JP4229796B2 - DATA DISPLAY DEVICE, DATA DISPLAY METHOD, DATA DISPLAY PROGRAM, AND RECORDING MEDIUM CONTAINING THE PROGRAM - Google Patents

Description

  The present invention relates to a data display device, a data display method, a data display program, and a recording medium on which the program is recorded, and in particular, a data display device, a data display method, and a data display program capable of optimally displaying a plurality of objects. And a recording medium on which the program is recorded.

  As electronic data composed of a plurality of objects, vector graphics for forming a graphic image by geometric figure information such as points, straight lines, and circles and drawing information such as painting and special effects are known. Since vector graphics reproduces an image by calculating elements necessary for drawing each time it is displayed, image quality suitable for resolution is maintained even when deformation processing such as enlargement / reduction is performed. For this reason, it is suitable for artificial images such as illustrations and drawings with clear lines and surface outlines, but not suitable for images such as photographs and natural images.

  As an example of a vector graphics display device, Patent Document 1 discloses a reduced vector map display device and method.

  In the display device disclosed in Patent Document 1, it is determined whether or not each object to be displayed is simplified by performing display / non-display determination. For this reason, it is possible to display a map in which objects are dense and difficult to see, and the number of objects to be displayed is further reduced, so that the display speed is increased and high-speed display is possible.

The data structure of image data in vector graphics is disclosed in Patent Document 2.
JP 2002-319442 A Japanese Patent Laid-Open No. 10-105697

  However, as with vector graphics, every time drawing processing for reduced display is performed, reduction processing is performed on all objects, and display / non-display determination is performed. There is a problem that processing is required and processing time is delayed.

  There is also a problem that a large amount of memory is required for processing.

  The present invention has been made in view of such problems, and provides a data display device, a data display method, a data display program, and a recording medium on which the program is recorded, which can perform display processing at high speed. With the goal.

  It is another object of the present invention to provide a data display device, a data display method, a data display program, and a recording medium on which the program is recorded, which can reduce the memory capacity required for display processing.

  In order to achieve the above object, according to one aspect of the present invention, a data display device includes a feature amount input means for inputting feature amounts of a plurality of objects, and the plurality of input feature amounts based on the size thereof. Array processing means for arranging the objects, comparison processing means for comparing the feature quantities of the arranged objects with a predetermined threshold value, and an object for inputting an object having a feature quantity larger than the threshold value based on the comparison result Input means and display processing means for performing processing for displaying the input object.

  In addition, the data display device includes: an object designating unit for designating an arbitrary object from the plurality of objects; a feature quantity extracting unit for extracting the feature quantity of the designated object from the arranged feature quantities; and the extracted feature It is preferable to further comprise threshold setting means for setting the amount as the predetermined threshold.

  According to another aspect of the present invention, the data display device includes a feature amount input unit that inputs feature amounts of a plurality of objects, and an array processing unit that arranges the plurality of input feature amounts based on their sizes. An object number designating unit for designating the number of objects to be displayed; a feature quantity extracting unit for extracting a feature quantity corresponding to the designated number of objects from the feature quantities of the arranged objects; and A comparison processing means for comparing the threshold value, an object input means for inputting an object having a feature value larger than the threshold value based on the comparison result, and an enlargement / reduction ratio of the input object based on the comparison result An enlargement / reduction ratio calculating means for calculating and a display processing means for performing processing for displaying the input object are provided.

  According to still another aspect of the present invention, a data display method is a data display method for displaying a plurality of objects in a data display device, wherein a feature amount input step for inputting feature amounts of the plurality of objects is input. An array processing step for arranging a plurality of feature quantities based on their sizes, a comparison processing step for comparing feature quantities of the arranged objects with a predetermined threshold value, and a threshold value based on the comparison result An object input step for inputting an object having a larger feature amount; and a display processing step for performing a process for displaying the input object.

  According to still another aspect of the present invention, a data display method is a data display method for displaying a plurality of objects in a data display device, wherein a feature amount input step for inputting feature amounts of the plurality of objects is input. An array processing step that arranges a plurality of feature quantities based on their sizes, an object number designation step that designates the number of objects to be displayed, and a feature quantity that corresponds to the number of objects designated from the feature quantities of the arranged objects A feature amount extraction step for extracting the feature amount, a comparison processing step for comparing the extracted feature amount with a predetermined threshold value, and an object input for inputting an object having a feature amount greater than the threshold value based on the comparison result Enlargement / reduction ratio calculation that calculates the enlargement / reduction ratio of the input object based on the step and comparison result Comprising the steps, and a display processing step of performing processing for displaying the input object.

  According to still another aspect of the present invention, a data display program is a program for causing a computer to execute a data display method for displaying a plurality of objects, a feature amount input step for inputting feature amounts of the plurality of objects, and an input An array processing step for arranging the plurality of feature quantities arranged based on the size, a comparison processing step for comparing the feature quantities of the arranged objects with a predetermined threshold value, and based on the comparison result. An object input step for inputting an object having a feature amount larger than the threshold value and a display processing step for performing a process for displaying the input object are executed.

  According to still another aspect of the present invention, a data display program is a program for causing a computer to execute a data display method for displaying a plurality of objects, a feature amount input step for inputting feature amounts of the plurality of objects, and an input An array processing step for arranging the plurality of feature quantities arranged based on their sizes, an object number designation step for designating the number of objects to be displayed, and an object number designated from the feature quantities of the arranged objects A feature amount extraction step for extracting feature amounts, a comparison processing step for comparing the extracted feature amounts with a predetermined threshold value, and an object having a feature amount larger than the threshold value are input based on the comparison result. Based on the object input step and the comparison result, the scaling ratio of the input object is calculated. A scaling ratio calculating step of leaving, to execute a display processing step of performing processing for displaying the input object.

  According to still another aspect of the present invention, the recording medium is a computer-readable recording medium and records the above-described data display program.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the same parts and components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[First Embodiment]
FIG. 1 is a diagram illustrating a configuration of a data display system according to the first embodiment. With reference to FIG. 1, the data display system according to the present embodiment includes a recording medium 101, a network 102, and a data display device 106.

  The recording medium 101 is used for supplying electronic data 103 to the data display device 106. The recording medium 101 corresponds to a medium such as a flexible disk, a CD-ROM (Compact Disc-Read Only Memory), and a hard disk.

  The data display device 106 is connected to a server or other personal computer having a database storing the electronic data 103 via a network 102.

  The electronic data 103 is supplied to the data display device 106 directly from the recording medium 101 or via the network 102.

  The electronic data 103 includes object data 105 and feature amount data 104. Furthermore, the object data 105 includes a plurality of objects. The object is assumed to be vector graphics and has a data structure including information necessary for drawing such as shape, coordinates, and thickness. The feature amount data 104 is composed of feature amounts calculated from each object. The feature amount is assumed to be a value obtained by quantifying the thickness of the line drawn by the object, the font size, the area, or the like based on a predetermined reference, or a value calculated by a ratio to the drawing area. An object that can be clearly displayed even after performing a reduction process, such as a thick line drawn by an object, a large font size, or a large area, has a larger feature amount.

  The data structure of the electronic data 103 will be described later with a specific example.

  The data display device 106 is a device for displaying the electronic data 103 supplied from the recording medium 101 and / or the network 102.

  Further, referring to FIG. 1, a data display device 106 according to the present embodiment includes an address specifying unit 107, a feature data input processing unit 108, an object data input processing unit 109, a display processing unit 110, an array The processing unit 111, the comparison processing unit 112, the threshold value calculation unit 113, and the enlargement / reduction ratio calculation unit 114 are configured.

  The address designating unit 107 designates the address of the feature amount data 104 of the electronic data 103 to be read.

  The feature amount data input processing unit 108 reads the feature amount data 104 of the electronic data 103 specified by the address specifying unit 107 from another device via the recording medium 101 or the network 102, and reads the read feature amount data 104. The data is passed to the array processing unit 111.

  The arrangement processing unit 111 executes a process of arranging the feature amount data 104 transferred from the feature amount data input processing unit 108 in order of size. Then, the arranged feature amount data 104 is transferred to the comparison processing unit 112.

  The enlargement / reduction ratio calculation unit 114 receives an enlargement / reduction instruction from the user and calculates the enlargement / reduction ratio M based on the instruction. The enlargement / reduction ratio M is a ratio between a display area that has not been enlarged / reduced and a target display area after the instruction, or a ratio between the display area currently displayed and the target display area after the instruction. Calculated. Then, the enlargement / reduction calculation unit 114 passes the calculated enlargement / reduction ratio M to the threshold value calculation unit 113 and the display processing unit 110.

  The threshold calculation unit 113 calculates the threshold α based on the enlargement / reduction ratio M passed from the enlargement / reduction instruction unit 114. Then, the threshold value calculation unit 113 passes the calculated threshold value α to the comparison processing unit 112.

  The comparison processing unit 112 compares the arranged feature amount data 104 passed from the arrangement processing unit 111 with the threshold value α passed from the threshold value calculation unit 113 to determine an object to be displayed. Then, the comparison processing unit 112 passes information about the determined object to the array processing unit 111.

  The array processing unit 111 acquires the address of the object based on the information about the display target object passed from the comparison processing unit 112, and passes it to the address designating unit 107. The address designating unit 107 designates the address passed from the array processing unit 111 as the address of the object data 105 to be read.

  The object data input processing unit 109 reads the object data 105 of the electronic data 103 specified by the address specifying unit 107 from another device via the recording medium 101 or the network 102, and displays the read object data 105 as a display processing unit. 110.

  The display processing unit 110 generates and displays data necessary for drawing using the object data 105 passed from the object data input processing unit 109 and the enlargement / reduction ratio M passed from the enlargement / reduction ratio calculation unit 114. To do.

  Next, data display processing in the data display device 106 according to the present embodiment will be described using the flowchart of FIG. The data display process shown in the flowchart of FIG. 2 is executed by an operation control unit (not shown) that controls the overall operation of the data display device 106 reading and executing a program stored in a storage device (not shown). This is realized by controlling each unit shown in FIG.

  Here, it is assumed that the electronic data 103 supplied from the other device to the data display device 106 via the recording medium 101 or the network 102 has a specific data structure shown in FIG.

  Referring to FIG. 3, electronic data 103 in the specific example includes object data 105 as data 1 (405), data 2 (406), data 3 (407), and data 4 (408) representing each of a plurality of objects. The feature amount data 104 is composed of a plurality of feature amount data 401, 402, 403, 404 corresponding to data 1-4 representing each object.

  Data 1 (405) to 4 (408) representing each object includes information necessary for drawing such as the shape, coordinates, and thickness of the object. The data structure of the object shown in FIG. 3 is a vector graphics data structure, but the data structure of the object data 105 is not limited to the data structure shown in FIG. 3, but is an existing vector graphics data structure. Good.

  The feature quantity data 401, 402, 403, and 404 each have a data structure having information in which the feature quantity value and the position information of the object corresponding to the feature quantity are in a one-to-one pair.

  Referring to FIG. 2, first, feature quantity data 104 of electronic data 103 designated by address designation section 107 is read in a feature quantity data input processing section (S1001).

  Next, in the array processing unit 111, the feature data 104 read by the feature data input processing unit 108 is arrayed in order of size (S1002).

  Here, if the magnitude relationship between the feature quantities of the feature quantity data 401, 402, 403, and 404 shown in FIG. 3 is Sd1> Sd2> Sd3> Sd4, the feature quantity data 104 read in step S1001 has already been obtained. If they are arranged in order of size, the arrangement processing unit 111 may arrange them in the order in which they are read in step S1002. On the other hand, if the feature amount data 104 read in step S1001 is not arranged in order of size, it is arranged in the order of size.

  Next, the enlargement / reduction ratio calculation unit 114 waits for an enlargement / reduction instruction from the user (NO in S1003). When an instruction from the user is received (YES in S1003), the enlargement / reduction ratio M is determined based on the instruction. Calculated (S1004).

  Next, the threshold calculation unit 113 calculates and determines the threshold value α based on the enlargement / reduction ratio M calculated in step S1004 (S1005). In step S1005, the threshold value α is calculated as α = L / M with respect to the limit value L that can be displayed. It is assumed that the limit value L that can be displayed is calculated or set based on a predetermined standard.

  Here, the setting of the limit value L that can be displayed on the data display device 106 will be described with reference to FIGS. 4 and 5. FIG. The feature amount and the limit value L that can be displayed are determined in units of pixels. In FIG. 4, an area 801 having a width Xa pixel and a height Ya pixel represents a drawing area, and pixels 802, 803, 804, and 805 represent one pixel in the drawing area 801. In FIG. 5, a region 901 having a width Xb pixel and a height Yb pixel represents a display region, and a pixel 902 represents one pixel in the display region 901. Further, for simplicity of explanation, it is assumed that Xa = 2Xb, Ya = 2Yb, and the pixels 802, 803, 804, 805, and 902 include only white pixels or black pixels.

  When the drawing area 801 is displayed on the display area 901, since Xa = 2Xb and Ya = 2Yb, the drawing area 801 is reduced and displayed in a quarter of the width and height. It is necessary to let In this reduction process, the four pixels 802, 803, 804, and 805 correspond to the pixel 902 that is one pixel in the display area 901. At this time, of the four pixels 802, 803, 804, and 805, if the pixel 902 is set as a black pixel when the black pixel is equal to or larger than the P pixel, the limit value L that can display “P”. It corresponds to.

  Note that the description of setting the limit value L that can be displayed using FIGS. 4 and 5 represents one specific example of setting the limit value L that can be displayed, and the present invention is not limited to this.

  After the threshold value α is calculated in step S1005, the comparison processing unit 112 compares the feature amount data 104 arranged in step S1002 with the threshold value α calculated in step S1005. It is determined whether to compare from the end with the large feature amount of the arranged feature amount 104 or from the end with the small feature amount. Therefore, first, the maximum value Smax and the minimum value Smin of the feature amount, which is the end of the sequence, are acquired (S1006).

  Next, the absolute value of the difference between each of the maximum value Smax and minimum value Smin acquired in step S1006 and the threshold value α is calculated (S1007). If the absolute value of the difference between the maximum value Smax and the threshold value α is Dmax, and the absolute value of the difference between the minimum value Smin and the threshold value α is Dmin, the absolute values obtained in step S1007 are respectively Dmax = | Smax− α |, Dmin = | Smin−α |.

  Next, the magnitudes of the absolute value Dmax and the absolute value Dmin calculated in step S1007 are compared (S1008).

  If the absolute value Dmax is larger than the absolute value Dmin as a result of the comparison in step S1008 (YES in S1008), the array search pointer for searching for the position of the feature data 104 arranged in step S1001 is the absolute value Smin. (S1009). In this case, the comparison with the threshold value α is performed from the end where the feature amount of the feature amount 104 arranged in step S1001 is small.

  On the other hand, as a result of the comparison in step S1008, if the absolute value Dmin is larger than the absolute value Dmax (NO in S1008), the array search pointer is set to a position given by the absolute value Smax (S1010). In this case, the comparison with the threshold value α is performed from the end with the large feature quantity of the feature quantity 104 arranged in step S1001.

  It should be noted that the processing of the above-described steps S1006 to S1010 is performed by comparing the threshold value α from the end with the large feature amount of the feature amount data 104 arranged at step S1001, or from the end with the small feature amount. It suffices if it is possible to determine whether to compare with α and to initialize the array search pointer. Therefore, the method is not limited to the method described above.

  Next, in order to specify the position of the threshold value α from the feature value data 104 arranged in step S1001, the feature value data 104 arranged in step S1001 is compared with the threshold value α. Therefore, as a parameter for temporarily storing the feature quantity, a feature quantity S1 representing a feature quantity larger than the threshold value α and a feature quantity S2 representing a feature quantity smaller than the threshold value α are provided, and the feature quantity S1 and the feature quantity are provided. S2 is initialized (S1011). First, it is determined whether or not the feature quantity S1 and the feature quantity S2 are adjacent in the arrangement in step S1001 (S1012). Since the determination of whether or not the feature amount S1 and the feature amount S2 are adjacent to each other in step S1012 is to determine the position of the threshold value α in the arranged feature amount data 104, the feature amount S1 and the feature amount are determined. S2 may indicate both ends of the sequence, and in this case, it is determined that they are adjacent.

  As a result of the determination in step S1012, if it is determined that the feature quantity S1 and the feature quantity S2 are not adjacent (NO in S1012), the feature quantity S at the position of the array search pointer is acquired (S1013), The feature amount S is compared with the threshold value α (S1014).

  Next, the feature amount S1 or the feature amount S2 is updated based on the result of the size comparison in step S1014. That is, when the feature amount S is greater than the threshold value α and the feature amount S is greater than the feature amount S1 (YES in S1014 and YES in S1015), the feature amount S is set as the feature amount S1 (S1017). On the other hand, when the feature amount S is larger than the threshold value α and the feature amount S is smaller than the feature amount S1 (YES in S1014 and NO in S1015), the process in step S1017 is skipped and the feature amount S1 is not updated. .

  When the feature amount S is smaller than the threshold value α and the feature amount S is smaller than the feature amount S2 (NO in S1014 and YES in S1016), the feature amount S is set as the feature amount S2 (S1018). On the other hand, when the feature amount S is smaller than the threshold value α and the feature amount S is greater than the feature amount S2 (NO in S1014 and NO in S1016), the process in step S1018 is skipped and the feature amount S2 is not updated. .

  When the processes of steps S1012 to S1018 described above are completed, the array search pointer is moved to the position of the next adjacent array (S1019), the process returns to step S1012, and the feature amount S1 and the feature amount S2 are again set. It is determined whether the sequences are adjacent.

  Note that the above-described processing of step S1012 to step S1019 is repeated until it is determined that the arrangement of the feature quantity S1 and the feature quantity S2 is adjacent. This process is not limited to the above-described method, as long as the position of the threshold value α can be specified in the feature amount data 104 arranged in step S1001.

  On the other hand, if it is determined in step S1012 that the feature amount S1 and the feature amount S2 are adjacent to each other (YES in S1012), an object having the feature amount S1 or more determined to be greater than or equal to the threshold value α. The display target is determined (S1020).

  Next, the array processing unit 111 acquires the address of the object determined as the display target in step S1020 (S1021). The address specifying unit 107 specifies the address of the object acquired in step S1021, and the object data input processing unit 109 acquires only the object data to be displayed (S1022).

  Subsequently, in the display processing unit 110, data necessary for drawing is generated and displayed based on the object data acquired in step S1022 and the enlargement / reduction ratio M calculated in step S1004 (S1023).

  If an end instruction is given by the user after the display process in step S1023 (YES in S1024), all the processes are ended. If the end instruction is not given (NO in S1024), the process returns to step S1003 to wait for the enlargement / reduction instruction again, and the subsequent processes are repeated.

  The above is the data display processing in the data display device 106 according to the present exemplary embodiment.

  Furthermore, the display when the above-described data display processing is performed on the electronic data 103 whose specific example is shown in FIG. 3 will be described specifically with reference to FIGS. Also here, it is assumed that the feature amount data 401, 402, 403, and 404 shown in FIG. 3 are arranged in the order of feature amounts Sd1> Sd2> Sd3> Sd4.

  FIG. 6 is a diagram showing a specific example of display when the threshold value α determined in step S1005 is α <Sd4. In this case, in step S1022, the object data 4, 1, 2, 3 corresponding to the feature amounts Sd1, Sd2, Sd3, Sd4 determined to be equal to or larger than the threshold value α in step S1020 are read and scaled. It is drawn and displayed based on the rate M. In the specific example shown in FIG. 6, the object represented by data 4 is a circle 501, the object represented by data 1 is a square 502, the object represented by data 2 is a line 503, and the object represented by data 3 is a line 504. It corresponds to.

  On the other hand, FIG. 7 is a diagram showing a specific example of display when the threshold value α determined in step S1005 is Sd3 <α <Sd2. In this case, in step S1022 described above, the object data 4, 1 corresponding to the feature amounts Sd1, Sd2 determined to be equal to or greater than the threshold value α is read, drawn based on the enlargement / reduction ratio M, and displayed. Yes. At this time, since the feature amounts Sd3 and Sd4 are determined to be equal to or less than the threshold value α in step S1022, the corresponding object data 2 and 3 are not read in step S1022. In the specific example shown in FIG. 7, the object represented by data 4 corresponds to a circle 601, and the object represented by data 1 corresponds to a rectangle 602.

  On the other hand, FIG. 8 is a diagram showing a specific example of display when the threshold value α determined in step S1005 is Sd2 <α <Sd1. In this case, in step S1022 described above, the object data 4 corresponding to the feature amount Sd1 determined to be equal to or greater than the threshold value α is read, and is drawn and displayed based on the enlargement / reduction ratio M. Similarly, since the feature values Sd2, Sd3, Sd4 are determined to be equal to or less than the threshold value α in step S1022, the corresponding object data 1, 2, 3 are not read in step S1022. In the specific example shown in FIG. 8, the data 4 corresponds to a circle 701.

  As described above, in the data display device 106 according to the present embodiment, the processing of steps S1001 to S1020, which is processing until the object to be displayed is determined, is processed using only the feature amount data 104. Therefore, the enlargement / reduction processing of the object data 105 is not required. For this reason, data processing for display can be executed at high speed. Further, since the object data 105 is not used in the processing of steps S1001 to S1020, it is not necessary to read the object data 105. Therefore, the memory capacity to be used can be reduced.

  In step S1022, it is not necessary to read object data that is not a display target. Therefore, the memory capacity can be reduced. In step S1023, there is no need to execute processing for generating data necessary for drawing object data that is not a display target. Therefore, the display process can be speeded up.

[Second Embodiment]
FIG. 9 is a diagram illustrating a configuration of a data display system according to the second embodiment. Referring to FIG. 9, the data display system according to the present exemplary embodiment includes a recording medium 201, a network 202, and a data display device 206.

  Since the recording medium 201 and the electronic data 203 are the same as the recording medium 101 and the electronic data 103 according to the first embodiment, description thereof will not be repeated here.

  Further, referring to FIG. 9, the data display device 206 according to the present embodiment includes an address specifying unit 207, a feature data input processing unit 208, an object data input processing unit 209, a display processing unit 210, an object The number designation unit 211, the array processing unit 212, the display determination unit 213, the threshold value acquisition unit 214, and the enlargement / reduction rate calculation unit 215 are configured.

  The feature amount data input processing unit 208 receives the feature amount data 204 of the electronic data 203 specified by the address specifying unit 207 in the same manner as the feature amount data input processing unit 108 in the data processing apparatus 106 according to the first embodiment. Then, the data is read from another apparatus via the recording medium 201 or the network 202, and the read feature data 204 is transferred to the array processing unit 212.

  The object number designating unit 211 receives an instruction from the user regarding the number of objects to be displayed, and determines the number N of objects to be displayed. Then, the determined number N of objects to be displayed is passed to the array processing unit 212.

  The array processing unit 212 executes processing for arranging the feature amount data 104 passed from the feature amount data input processing unit 208 in the order of size, and at the same time, N pieces of N pieces that are the number passed from the object number designating unit 211 The feature amount is determined as a display target. Then, the array processing unit 212 passes the N feature amounts determined as display targets to the display determination unit 213.

  The threshold acquisition unit 214 acquires a threshold given by α = L with respect to a limit value L that can be displayed. Note that the limit value L that can be displayed is calculated based on the predetermined criterion as described above. Then, the threshold value acquisition unit 214 passes the acquired threshold value α to the display determination unit 213.

  The display determination unit 213 determines whether or not the N feature amounts passed from the array processing unit 212 can be displayed based on the threshold value α passed from the threshold acquisition unit 214. Then, the display determination unit 213 passes the determination result to the array processing unit 212 according to the determination result.

  Similar to the array processing unit 111 in the data processing apparatus 106 according to the first embodiment, the array processing unit 212 receives addresses of N objects determined as display targets based on the determination result in the display determination unit 213. Acquired and passed to the address specifying unit 207. The address specification unit 207 specifies the address passed from the array processing unit 212 as the address of the object data 205 to be read. Then, the object data input processing unit 209 reads the object data 205 of the electronic data 203 specified by the address specifying unit 207 from another device via the recording medium 201 or the network 202, and displays the read object data 205. The data is passed to the processing unit 210.

  Alternatively, the display determination unit 213 passes the N feature amount and the threshold value α to the enlargement / reduction rate calculation unit 215 according to the determination result.

  The enlargement / reduction rate calculation unit 215 calculates an enlargement / reduction rate M that can optimally display the N feature amounts based on the N feature amounts passed from the display determination unit 213 and the threshold value α. Then, the enlargement / reduction calculation unit 215 passes the calculated enlargement / reduction ratio M to the display processing unit 210.

  The display processing unit 210 generates and displays data necessary for drawing using the object data 205 passed from the object data input processing unit 209 and the enlargement / reduction rate M passed from the enlargement / reduction rate calculation unit 215. To do.

  Next, data display processing in the data display device 206 according to the present embodiment will be described using the flowchart of FIG. The data display process shown in the flowchart of FIG. 10 is also executed by an operation control unit (not shown) that controls the operation of the entire data display device 206 reading out a program stored in a storage device (not shown). This is realized by controlling each unit shown in FIG.

  In this case as well, the electronic data 203 supplied from the other device to the data display device 206 via the recording medium 201 or the network 202 is specifically the data structure shown in FIG. 3 in the first embodiment. Suppose that

  Referring to FIG. 10, the feature amount data reading process and the array processing in steps S2001 and S2002 are the same as the feature amount data reading process and the array processing in steps S1001 and S1002 of the first embodiment. Therefore, the description here will not be repeated.

  Next, the object number designating unit 211 waits for an instruction on the number of display objects from the user (NO in S2003) and receives an instruction from the user (YES in S2003). Based on the instruction, the object to be displayed is displayed. N is determined (S2004).

  Next, in the array processing unit 212, the position of the array search pointer is initialized (S2005). In step S2005, the initial value is set to the maximum value of the feature quantity that is the end of the feature quantity data arranged in order of size in step S2001, and is initialized.

  Next, the array processing unit 212 determines N feature quantities to be displayed from the position of the array search pointer (S2006). As described above, in step S2005, the sequence search pointer is set to the maximum value of the feature value that is the end of the sequence. Therefore, in step S2006, N feature values are displayed in order from the largest feature value. To be determined.

  Next, the display determination unit 213 extracts N feature amounts determined as display targets in step S2006 from the feature amounts read in step S2001 (S2007).

  Next, the threshold value acquisition unit 214 acquires the threshold value α based on the limit value L that can be displayed calculated based on a predetermined criterion (S2008). In step S2008, the threshold value α is acquired with α = L with respect to the limit value L that can be displayed.

  Next, the display determination unit 213 determines whether or not the N feature amounts extracted in step S2007 can be displayed based on the threshold value α acquired in step S2008 (S2009).

  In step S2009, when all the N feature quantities extracted in step S2007 are larger than the threshold value α, it is determined that the feature quantities can be displayed (YES in S2009), and the enlargement / reduction ratio calculation unit 215 In step S2010, the enlargement / reduction ratio M at which the N feature values can be optimally displayed is calculated based on the N feature values and the threshold value α (S2010).

  On the other hand, in step S2009, when there is a feature quantity smaller than the threshold value α among the N feature quantities extracted in step S2007, it is determined that the N feature quantities cannot be displayed (S2009). The process returns to step S2003, and the object number designation unit 211 again waits for an instruction on the number of display objects from the user (S2003). Then, the subsequent processing is repeated.

  The acquisition of the address of the object data to be displayed and the reading process of the object data in the array processing unit 212 and the object data input processing unit 109 in steps S2011 and S2012 are performed in steps S1021 and S1022 in the first embodiment. Since this is the same as the above process, the description here will not be repeated.

  Subsequently, in the display processing unit 210, data necessary for drawing is generated and displayed based on the object data read in step S2012 and the enlargement / reduction ratio M calculated in step S2010 (S2013).

  If an end instruction is given by the user after the display process in step S2013 (YES in S2014), all the processes are ended. If no end instruction is given (NO in S2014), the process returns to step S2003 to wait for an instruction for the number of display objects again, and the subsequent processes are repeated.

  The above is the data display processing in the data display device 206 according to the present embodiment.

  Furthermore, the display when the above-described data display process is performed on the electronic data 103 whose specific example is shown in FIG. 3 will be specifically described with reference to FIG.

  In the above-described step S2003, if it is specified by the user that the number of objects to be displayed is two, the feature value data of the electronic data 103 whose specific example is shown in FIG. The feature amounts corresponding to the two values Sd1 and Sd2 in order from the value Sd1 are determined as display target feature amounts, and the object data 4 and 1 corresponding to the feature amounts are displayed.

  FIG. 7 is a diagram illustrating a specific example of display when it is determined in step S2009 described above that these two feature amounts can be displayed. In this case, in the above-described step S2012, the object data 4, 1 corresponding to the feature amounts Sd1, Sd2 determined to be displayable in step S2009 is read, drawn based on the enlargement / reduction ratio M, and displayed. Yes. In the specific example shown in FIG. 7, the object represented by data 4 corresponds to a circle 601, and the object represented by data 1 corresponds to a rectangle 602. In step S2010 described above, the enlargement / reduction ratio M is an enlargement / reduction ratio calculated so that an optimum display can be realized.

  As described above, in the data display device 206 according to the present embodiment, the processing from steps S2001 to S2010, which is the processing until the object to be displayed is determined and the enlargement / reduction ratio is calculated, is the same as that of the first embodiment. Similarly, the processing is performed using only the feature data 204, and the enlargement / reduction processing of the object data 205 is not required. For this reason, data processing for display can be executed at high speed. Further, since the object data 205 is not used in the processing of steps S2001 to S2011, it is not necessary to read the object data 205. Therefore, the memory capacity to be used can be reduced.

  In step S2012, it is not necessary to read object data that is not a display target, as in the first embodiment. Therefore, the memory capacity can be reduced. Further, in step S2013, there is no need to execute processing for generating data necessary for drawing object data that is not a display target. Therefore, the display process can be speeded up.

  Further, based on the feature quantity of the designated number N of objects and the limit value L that can be displayed, an enlargement / reduction ratio M that can be optimally displayed is calculated to perform enlargement / reduction processing. For this reason, it is possible to make the display easy to see.

[Third Embodiment]
FIG. 11 is a diagram illustrating a configuration of a data display system according to the third embodiment. Referring to FIG. 11, the data display system according to the present embodiment includes a recording medium 201, a network 302, and a data display device 306.

  Since the recording medium 301 and the electronic data 303 are the same as the recording medium 101 and the electronic data 103 according to the first embodiment, description thereof will not be repeated here.

  Further, referring to FIG. 11, the data display device 306 according to the present embodiment includes an address specifying unit 307, a feature data input processing unit 308, an object data input processing unit 309, a display processing unit 310, and an array. The processing unit 311, the comparison processing unit 312, the threshold value calculation unit 313, the enlargement / reduction ratio calculation unit 314, and the object designation unit 315 are configured.

  The feature amount data input processing unit 308 receives the feature amount data 304 of the electronic data 303 specified by the address specifying unit 307 in the same manner as the feature amount data input processing unit 108 in the data processing apparatus 106 according to the first embodiment. Then, it is read from another device via the recording medium 301 or the network 302, and the read feature amount data 304 is transferred to the array processing unit 311.

  The object designating unit 315 receives an instruction of the display target object from the user, and passes information specifying the designated display target object to the array processing unit 212.

  The array processing unit 311 executes processing for arranging the feature amount data 104 transferred from the feature amount data input processing unit 308 in order of size, and also transfers the feature amount data 104 from the object specifying unit 315 from the feature amount data 104. Based on the specified information, the feature quantity S corresponding to the designated display target object is extracted. Then, the array processing unit 311 passes the extracted feature amount S to the threshold value calculation unit 313. Further, the arrangement processing unit 311 passes the arranged feature amount data 304 to the comparison processing unit 312.

  The threshold value calculation unit 313 calculates a threshold value α obtained by α = S based on the feature amount S passed from the array processing unit 311. Then, the threshold value calculation unit 313 passes the calculated threshold value α to the comparison processing unit 312 and the enlargement / reduction rate calculation unit 314.

  The enlargement / reduction rate calculation unit 314 calculates the enlargement / reduction rate M based on the threshold value α passed from the threshold value calculation unit 313 and the limit value L that can be displayed. Then, the enlargement / reduction calculation unit 314 passes the calculated enlargement / reduction rate M to the display processing unit 310.

  Similar to the comparison processing unit 112 of the data display device 106 according to the first embodiment, the comparison processing unit 312 transfers the feature data 304 arranged from the arrangement processing unit 311 and the threshold calculation unit 313. The object to be displayed is determined by comparing with the threshold value α. Then, the comparison processing unit 312 passes information on the determined object to the array processing unit 311.

  Similar to the array processing unit 111 in the data processing device 106 according to the first embodiment, the array processing unit 311 is based on the information about the display target object passed from the comparison processing unit 312, and the address of the object Is transferred to the address specifying unit 307. The address specifying unit 307 specifies the address passed from the array processing unit 311 as the address of the object data 305 to be read.

  The object data input processing unit 309 reads the object data 305 of the electronic data 303 specified by the address specifying unit 307 from another device via the recording medium 301 or the network 302, and displays the read object data 305. 310.

  The display processing unit 310 uses the object data 305 passed from the object data input processing unit 309 and the enlargement / reduction rate M passed from the enlargement / reduction rate calculation unit 314 to generate and display data necessary for drawing. To do.

  Next, data display processing in the data display device 306 according to the present embodiment will be described using the flowchart of FIG. The data display process shown in the flowchart of FIG. 12 is also executed by an operation control unit (not shown) that controls the overall operation of the data display device 306 by reading a program stored in a storage device (not shown). This is realized by controlling each unit shown in FIG.

  In this case as well, the electronic data 303 supplied from the other device to the data display device 306 via the recording medium 301 or the network 302 is specifically the data structure shown in FIG. 3 in the first embodiment. Suppose that

  Referring to FIG. 12, a series of processing from step S3001 to S3007 is the same as the processing from S1001 to S1023 in the first embodiment. More specifically, the calculation process of threshold value α in step S3003 corresponds to the process of steps S1003 to S1005 in the first embodiment, and the determination of the feature quantity of the display target that is equal to or larger than threshold value α in step S3004. The processing corresponds to the processing in steps S1006 to S1020 in the first embodiment. Therefore, description here will not be repeated.

  After the display process is performed in step S3007, if an end instruction is given by the user (YES in S3008), all the processes are ended. If the end instruction is not given (NO in S3008), the object designation unit 315 waits for the designation of the object from the user (NO in S3009).

  When the object designation unit 315 receives an instruction from the user (YES in S3009), the array processing unit 311 extracts the feature quantity S of the designated object from the feature quantity data 304 read in step S3001 ( S3010).

  Next, the threshold value calculation unit 313 determines the feature amount S of the object extracted in step S3010 as the threshold value α (S3011). That is, in step S3011, the threshold value α is α = S.

  Next, the enlargement / reduction ratio calculation unit 314 calculates the optimum enlargement / reduction ratio M based on the limit value L that can be displayed and the threshold value α determined in step S3011 (S3012). The limit value L that can be displayed is calculated based on a predetermined standard.

  Then, the process returns to step S3004, and thereafter, the process after step S3004 is repeated using the threshold value α determined in step S3011 and the enlargement / reduction ratio M calculated in step S3012. Since this process is the same as that of the first embodiment, description thereof will not be repeated here.

  Furthermore, the display when the above-described data display processing is performed on the electronic data 103 whose specific example is shown in FIG. 3 will be described specifically with reference to FIGS.

  Assume that the display shown in FIG. 6 is performed on the data display device 306. Furthermore, in step S3009 described above, it is assumed that the user has designated a square 502 object as a display target object for the display. The data corresponding to the object that is the rectangle 502 is data 1 (405) with reference to FIG. 3, and the feature amount data corresponding to the data 1 is feature amount data 402.

  At this time, when the feature amount Sd2 of the feature amount data 402 is determined to be the threshold value α in step S3011, the feature amount is determined as a result of the determination processing of the feature amount of the display target that is equal to or larger than the threshold value α in step S3004. Sd1 and Sd2 are determined as the feature quantities to be displayed, and the objects to be displayed are determined as objects corresponding to data 4 and data 1. Then, the data display device 306 performs the display shown in FIG.

  FIG. 7 is a diagram showing a specific example of display when it is determined in step S3004 described above that the feature amounts Sd1 and Sd2 are display targets. In this case, in step S3006 described above, the object data 4 and 1 corresponding to the feature amounts Sd1 and Sd2 are read and drawn based on the enlargement / reduction ratio M and displayed. In step S3007 described above, since the enlargement / reduction ratio M is an enlargement / reduction ratio calculated so that an optimum display can be performed, the display is easy to see.

  Thus, in the data display device 306 according to the present embodiment, the feature amount S of the designated object is set as the threshold value α. For this reason, it is possible to avoid displaying an object having a feature amount equal to or less than the feature amount S of the designated object. Further, since the enlargement / reduction ratio M that can be optimally displayed is calculated based on the threshold value α and the limit value L that can be displayed, the enlargement / reduction process is performed, so that the display can be easily viewed.

  The data display device described in the above first to third embodiments has the above-described configuration, and it is not necessary to perform an object enlargement / reduction process in the process of determining an object to be displayed. Whether or not it is a display target can be determined. For this reason, it can process at high speed.

  In addition, it is possible to perform a process of reading only feature data and determining an object to be displayed, and since it is not necessary to read object data other than the display object in the process, the memory capacity required for the process can be reduced. .

  Further, by designating the number of objects to be displayed, the electronic data is enlarged and reduced at an optimum enlargement / reduction ratio at which the designated number of objects are displayed, so that the display becomes easy to see.

  Furthermore, by designating an arbitrary object as a display target, an object having a feature quantity larger than the feature quantity of the designated object is displayed. It becomes easy to see.

  Furthermore, a method for determining an object to be displayed in the above-described data display device can be provided as a program. Such a program is recorded on a computer-readable recording medium such as a flexible disk attached to the computer, a CD-ROM, a ROM (Read Only Memory), a RAM (Random Access Memory), and a memory card as a program product. It can also be provided. Alternatively, the program can be provided by being recorded on a recording medium such as a hard disk built in the computer. A program can also be provided by downloading via a network.

  The provided program product is installed in a program storage unit such as a hard disk and executed. The program product includes the program itself and a recording medium on which the program is recorded.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows the specific example of a structure of the data display system concerning 1st Embodiment, and the structure of the data display apparatus 106. FIG. It is a flowchart which shows the data display process in the data display apparatus 106 concerning 1st Embodiment. It is a figure which shows the specific example of the data structure of the electronic data 103. FIG. It is a figure explaining the limit value L which can be displayed in a data display device. It is a figure explaining the limit value L which can be displayed in a data display device. It is a figure which shows the specific example of the display in a data display apparatus. It is a figure which shows the specific example of the display in a data display apparatus. It is a figure which shows the specific example of the display in a data display apparatus. It is a figure which shows the specific example of a structure of the data display system concerning 2nd Embodiment, and the structure of the data display apparatus 206. FIG. It is a flowchart which shows the data display process in the data display apparatus 206 concerning 2nd Embodiment. It is a figure which shows the specific example of a structure of the data display system concerning 3rd Embodiment, and the structure of the data display apparatus 306. It is a flowchart which shows the data display process in the data display apparatus 306 concerning 3rd Embodiment.

Explanation of symbols

  101, 201, 301 Recording medium, 102, 202, 302 Network, 103, 203, 303 Electronic data, 104, 204, 304, 401-404 Feature data, 105, 205, 305, 405-408 Object data, 106, 206, 306 Data display device, 107, 207, 307 Address specification unit, 108, 208, 308 Feature data input processing unit, 109, 209, 309 Object data input processing unit, 110, 210, 310 Display processing unit, 111, 212, 311 Array processing unit, 112, 312 Comparison processing unit, 113, 313 Threshold calculation unit, 114, 215, 314 Enlargement / reduction ratio calculation unit, 213 Display discrimination unit, 214 Threshold acquisition unit, 801, 901 area 802-805 902 pixels, 50 ～504,601,602,701 object.

Claims (5)

Feature quantity input means for inputting feature quantities of a plurality of objects;
Arrangement processing means for arranging the plurality of inputted feature quantities based on their sizes;
Comparison processing means for comparing the feature quantities of the arranged objects with a predetermined threshold value;
An object input means for inputting an object having a characteristic amount larger than the threshold based on the comparison result;
A data display device comprising: display processing means for performing processing for displaying the input object. Object designating means for designating an arbitrary object from the plurality of objects;
Feature quantity extraction means for extracting the feature quantity of the specified object from the arranged feature quantities;
The data display device according to claim 1, further comprising threshold setting means for setting the extracted feature amount as the predetermined threshold. A data display method for displaying a plurality of objects in a data display device,
A feature amount input step of inputting feature amounts of the plurality of objects;
An array processing step of arranging the plurality of input feature quantities based on the size;
A comparison processing step for comparing the feature quantity of the arranged objects with a predetermined threshold;
An object input step of inputting an object having a feature amount larger than the threshold based on the comparison result;
A data display method comprising: a display processing step for performing processing for displaying the input object. A program for causing a computer to execute a data display method for displaying a plurality of objects,
A feature amount input step of inputting feature amounts of the plurality of objects;
An array processing step of arranging the plurality of input feature quantities based on the size;
A comparison processing step for comparing the feature quantity of the arranged objects with a predetermined threshold;
An object input step of inputting an object having a feature amount larger than the threshold based on the comparison result;
A data display program for executing a display processing step for performing processing for displaying the input object. A computer-readable recording medium on which the data display program according to claim 4 is recorded.

Images