JP2676904B2 - Image supply device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image supply device that supplies digitized image data to a printing unit of a printer or a screen of a display device via a bitmap memory.

[Conventional technology]

Conventionally, in this type of device, when performing conversion processing by performing resolution conversion or enlarging / reducing an image captured from a host computer or the like, the size and number of each pixel before conversion processing are set for each pixel. Then, the image is converted and processed, continuously supplied to the bitmap memory, and an image for forming a recorded image is drawn.

[Problems to be solved by the invention]

However, in the image supply device, for example, as shown in FIG. 15 (a), when the number of images is increased by a magnification including a decimal point such as 1.5 times, a specific pixel (15th pixel) from the output start position is line by line. In the case of FIG. 7A, since the number of every second pixel from the output start position is changed, some lines are displayed with the same thickness line before the conversion process depending on the position of the image of each line. As shown in FIG. 15 (b), after the conversion process, the line thickness is different for each line, and there is a problem that an accurate image corresponding to the image before the conversion process is not formed.

The present invention has been made in view of the above problems, even in the case of a magnification including a decimal point, regardless of the output start position of the image,
An object of the present invention is to provide an image supply device capable of forming an accurate image such as a line having a uniform thickness corresponding to an image before conversion processing.

[Means for solving the problem]

In the first image supply device according to the present invention, the image supply for converting the pixels corresponding to the captured image data into a desired size and number and supplying the same to the storage means to form an image corresponding to the recorded image. In the apparatus, first calculation means for calculating a quotient and a remainder by dividing a total size of pixels before the conversion process corresponding to a position before the output start position by the size of the pixel after the conversion process, and the first calculation means. The size of the pixel before the conversion process is added to the remainder calculated by the calculation unit 1, and the added value is divided by the size of the pixel after the conversion process to calculate the quotient and the remainder, and the calculated remainder is calculated as follows. In the second calculation means for adding the pixel size before the conversion process to the calculation of the pixel, and dividing the added value by the size of the pixel after the conversion process. Determine the number of calculated quotients as the number of drawing pixels And pixel number determination means that are comprising a pixel determining means for determining a data value for a given pixel as a data value of the drawing pixel of just before the conversion process drawing number of pixels determined by the pixel number determining means.

Also, in the second image supply device according to the present invention, the pixels corresponding to the captured image data are converted into a desired size and number and supplied to the storage means to form an image corresponding to the recorded image. In the image supply device, first calculating means for calculating a quotient and a remainder by dividing the total size of pixels before the conversion process corresponding to the position before the output start position by the size of the pixel after the conversion process, The size of the pixel before the conversion process is added to the remainder calculated by the first calculating means,
And, the quotient and the remainder are calculated by dividing the added value by the size of the pixel after the conversion process, and when the pixel next to the calculated remainder is calculated, added to the size of the pixel before the conversion process, And second calculating means for dividing the added value by the size of the pixel after the conversion processing, pixel number determining means for determining the number of the quotient calculated by the second calculating means as the number of drawing pixels, and When the number of drawing pixels determined by the pixel number determining means is 1, the data value of the predetermined pixel before the conversion processing is determined as the data value of the drawing pixel, and the number of drawing pixels determined by the pixel determining means is If it is 2 or more, the data value of the predetermined pixel before the conversion processing and this data value and 1 of the predetermined pixel
Pixel determining means for determining the data value of the drawing pixel from the data value obtained by the theoretical product with the data value of the immediately preceding pixel.

Furthermore, in the third image supply device according to the present invention,
In the image supply device that converts the pixels corresponding to the captured image data into a desired size and number and supplies them to the storage means to form an image corresponding to the recorded image, which corresponds to the position before the output start position. A first calculation unit that calculates the quotient and the remainder by dividing the total size of the pixels before the conversion process by the size of the pixel after the conversion process, and the remainder before the conversion process calculated by the first calculation unit. The size of the pixel is added, and the added value is divided by the size of the pixel after the conversion process to calculate the quotient and the remainder, and the calculated remainder is calculated when calculating the next pixel. Of the quotient calculated by the second calculating means, and the number of quotients calculated by the second calculating means is determined as the number of drawing pixels. The pixel number determining means and the pixel number determining means When the determined number of drawing pixels is 1, the data value of the predetermined pixel before the conversion process is determined as the data value of the drawing pixel, and when the number of drawing pixels determined by the pixel number determining means is 2 or more. Is a pixel value for determining the data value of the drawing pixel from the data value of the predetermined pixel before the conversion process and the data value obtained by the logical sum of this data value and the data value of the pixel immediately preceding the predetermined pixel. And means.

In the fourth image supply device according to the present invention, the pixels corresponding to the captured image data are converted into a desired size and number and supplied to the storage means to form an image corresponding to the recorded image. In the image supply device, first calculating means for calculating a quotient and a remainder by dividing the total size of pixels before the conversion process corresponding to the position before the output start position by the size of the pixel after the conversion process, The size of the pixel before the conversion process is added to the remainder calculated by the first calculating means,
And the quotient and remainder are calculated by dividing the added value by the size of the pixel after the conversion process, and the calculated remainder is added to the size of the pixel before the conversion process when calculating the next pixel, And second calculating means for dividing the added value by the size of the image after conversion processing, pixel number determining means for determining the number of quotients calculated by the second calculating means as the number of drawing pixels, and the pixel The number of drawing pixels determined by the number determining means is the first pixel determining means for determining the data value of the predetermined pixel before the conversion process as the data value of the drawing pixel, and the number of drawing pixels determined by the pixel number determining means is In the case of 1, the data value of the predetermined pixel before the conversion processing is determined as the data value of the drawing pixel, and when the number of drawing pixels determined by the pixel number determining means is 2 or more, before the conversion processing The data value of a given pixel of and this data value and previous The second pixel determining means for determining the data value of the drawing pixel from the data value obtained by the logical product of the data value of the pixel one before the predetermined pixel and the number of drawing pixels determined by the pixel number determining means are In the case of 1, the data value of the predetermined pixel before the conversion processing is determined as the data value of the drawing pixel, and when the number of drawing pixels determined by the pixel number determining means is 2 or more, before the conversion processing Of the third pixel determining means for determining the data value of the drawing pixel from the data value of the predetermined pixel and the data value obtained by the logical sum of this data value and the data value of the pixel immediately preceding the predetermined pixel. A pixel determining means comprising at least two means,
A specifying unit for specifying a desired pixel determining unit among the pixel determining units.

[Operation] According to the above-described image supply device of the present invention, the pixel corresponding to the captured image data is converted into the desired size and number by the desired pixel determining means specified by the user from the panel as necessary. Process and supply the data to the bitmap memory.

Therefore, according to the present invention, even if the magnification includes a decimal point, the pixels can be determined by each pixel determining unit regardless of the image output start position, and thus an image such as a line having a uniform thickness can be formed. You can

〔Example〕

An embodiment of the present invention will be described in detail with reference to the drawings of FIGS.

FIG. 1 is a block diagram showing an outline when an image supply device according to the present invention is used in an image recording device such as a laser beam printer. In the figure, an image recording device includes an image supply device 11, a recording unit 12, and an AC power supply 13 for driving these.
And a panel 14 for inputting a recording operation instruction such as paper size, magnification, mode selection of image conversion processing according to the present invention from a user.

The image supply device 11 has a host interface connection terminal
Data consisting of an input code input from a host computer (not shown) via 15 is received, and image data for generating a predetermined image is generated from the input code. Further, the image supply device 11 is provided with a LAN connection terminal 16 for connecting to a local area network or the like.

The recording unit 12 is a device that records an image corresponding to the image data 18 on the recording paper 17, and receives the image data 18 and the operation command 19 from the image supply device 11, while the image supply device 11 and the recording operation are performed. A synchronization pulse 20 and a status signal 21 for synchronizing the above are output to the image supply device 11. The image data 18 from the image supply device 11 is input to a laser beam converter (not shown), and the polarization plane of the laser beam passing through the modulator is rotated according to the image data 18 by, for example, an electro-optical effect, and this so-called electrical The black-and-white binary image signal is converted into an optical ON / OFF signal of the laser beam by the dynamic shutter action, and an image corresponding to the image signal is recorded on the recording paper 17.

FIG. 2 is a block diagram showing a configuration of the image supply device 11 shown in FIG. In the figure, a host interface 31 (hereinafter, “interface” is referred to as “I / F”) is a circuit that receives input code data input from a host computer, for example, according to the RS232C standard.
The panel I / F 32 is a circuit for inputting an instruction from the panel 14 operated by the user. The recording unit I / F 33 is a circuit that relays each signal including the image signal 18 transmitted and received between the image supply device 11 and the recording unit 12 shown in FIG.

The program memories 34 and 35 store operation programs of the CPU 36 including programs of three different modes for image data conversion processing according to the present invention. A random access memory (hereinafter referred to as “RAM”) 37 stores various data for the operation of the CPU 36, input code data input from the host I / F 31, and the like. The bitmap memory 38 stores an image recorded on the recording paper 17 in the recording unit 12 for one page in a bitmap format, for example. Further, the character pattern memories 39 and 40 store each character pattern formed of a dot matrix. Of these memories, the program memory 35 and the character pattern memory 40
Can be used with various types of programs and character patterns by exchanging it with a removable memory as needed.

The CPU 36 time-divisionally controls each of the above devices based on the operation programs stored in the program memories 34 and 35 via the CPU bus 41, and temporarily stores them in the input code data RAM 37 input from the host computer, The input code thus converted is converted into desired image data according to the operation program according to the present invention, and is drawn in the bitmap memory 38. Bitmap controller 42
The access timing and the address to the bitmap memory 38 are controlled, and the image data formed in the bitmap memory 38 is controlled to be transferred to the recording unit I / F 33. The PTC 48 is a known programmable time counter, which measures the operating time of the CPU 36 and generates timing signals.

Next, the conversion processing operation according to the present invention will be described based on the flowcharts of FIGS. 3 to 8 and FIGS. 10 to 14.

FIG. 3 is a main routine of the conversion processing operation. First, when the power supply 13 is turned on (step 101), the initial setting necessary for the operation of the CPU 36 is performed (step 102). And
It is determined whether there is a key input from the panel 14 or data input from the host computer (step 10
3). If there is a key input or data input, it is next determined whether the input is a key input or data input (step 104).

Here, if there is a key input from the panel 14, the process proceeds to a subroutine of FIG. 4 which will be described later for processing the key corresponding to the key input (step 104), and in the case of data input from the host computer. To proceed to the subroutine shown in FIG.
105). When the above process is completed, the process returns to step 103 to wait for the next key input or data input.

FIG. 4 is a subroutine for explaining a key processing operation. First, it is judged whether or not the key input is for setting a recording sheet of a desired size (step 201).

If the key input is for recording paper settings, set the paper of the appropriate size (step
202), and after setting the recording paper, returns to step 105 in FIG. If it is not the setting of the recording paper, it is determined whether the key input is for setting the desired magnification (step 203). Note that the setting of the magnification includes the setting of the resolution.

Here, if the key input is for setting the magnification, the corresponding magnification is set (step 204), and after setting the magnification, the process returns to step 105 in FIG. If the key input is not the magnification setting, it is determined whether or not there is a mode setting for converting the magnification of the image data (step 205).

Here, if the key input is for mode setting, after setting the corresponding mode (step 206), the process returns to step 105 in FIG. 3 and if the key input is not for mode setting, Returns directly to step 105 in FIG. 3 to end the above operation.

FIG. 5 is a subroutine for explaining the data processing operation. First, it is judged whether the input data is image data or control code (step 301).

Here, if the input data is a control code, operation control corresponding to the control code is performed (step 302), and when the operation control ends, step 106 in FIG. 3 is performed.
Then, the above operation is completed. If the input data is image data, it is determined which of the three modes the mode set in FIG. 4 is set (step
303).

Here, when the set mode is the mode 1, the process proceeds to a subroutine for performing image data conversion processing in the mode 1 described later with reference to FIG. If the mode is mode 2, the process proceeds to a subroutine for performing image data conversion processing in mode 2 described later with reference to FIG. 7 (step 305), and if the set mode is mode 3 Mode 3 described later with reference to FIG.
Then, the process proceeds to a subroutine for performing the image data conversion process (step 306). When the image data conversion process in the above mode is completed, the process returns to step 106 in FIG. 3 to end the above operation.

FIG. 6 to FIG. 8 are sub-routines for explaining the conversion processing operations of mode 1, mode 2 and mode 3 according to the present invention. In the present embodiment, the low resolution image data of 1/160 (inch / dot) sent from the host computer is converted to the resolution of 1/240 (inch / dot) of the recording unit 12 (1.5
The above-mentioned recording unit
The unit of 12 internal pixels is 1/720000. As a result, the pixel size before the conversion process becomes 720000/160 = 4500 as shown in FIG. 9 (a), and the pixel size after the conversion process changes from FIG. 9 (b) to (d). ), Respectively,
720000/240 = 3000. Further, in the present embodiment, for convenience of explanation, the horizontal direction of the pixel shown in FIG.
The vertical direction is the Y direction. Also, FIG. 9 (b)
The images shown in (d) to (d) are pixels after the conversion processing from mode 1 to mode 3, and the numbers in each pixel are shown in FIG. 9 (a).
It corresponds to the pixel indicated by the number before the conversion process shown in FIG.

Note that high density conversion and enlargement of pixels can be performed by the same algorithm, and low density conversion and reduction of pixels can be performed by the same algorithm. Therefore, it is natural that only the density conversion of pixels or only the enlargement / reduction of pixels can be performed, but it is also possible to simultaneously perform the density conversion of pixels and the enlargement / reduction of pixels.

In the following embodiment, an example of enlarging / reducing will be described.

Referring to FIG. 6, when the CPU 36 receives image data (step 401), the CPU 36 prints a print start position in the X direction (that is, an output start position in the X direction) and a print start line in the Y direction from the header of the image data. (That is, the output start position in the Y direction) is obtained (step 402). Then, the sum of the pixel sizes before the conversion process corresponding to the position before the print start position in the X direction obtained in this way, and the conversion process corresponding to the position before the print start position in the Y direction (line) The sum of the sizes of the previous pixels is divided by the size of the expanded pixel desired by the user to obtain the quotient and the remainder (step 40).
3). In this case, for example, as shown in FIG. 9 (e), the size of the pixel before expansion is b, the size of the pixel after expansion is a,
The print start position is located at the nth dot (in the Y direction, the dot is replaced with a line, and n is a positive integer of 1 or more), and is located inside the pixel of the (n-1) th dot before enlargement, The pixel after expansion closest to the nth dot before expansion is q
(Q is a positive integer of 0 or more), and the remainder is r, (n-
1) × b / a = q + r / a, and the remainder r = (n−1) × b−
q × a. The print start position after enlargement is the dot next to q, that is, the q + 1th dot. Therefore, in the case of the magnification of 1.5 times that of the above embodiment, the remainder r becomes 0 when the print start position (line) is an odd dot,
When the number of dots is even, the remainder r is 1500.

Next, it is determined whether or not the image data in the Y direction is completed (step 404).

If the image data in the Y direction has ended, the process returns to step 304 in FIG. 5, and if the image data in the Y direction has not ended, enlargement / contraction in the X direction in FIG. Reduction conversion processing is performed (step 405). And
When the conversion processing for enlargement / reduction in the X direction is completed, the size of the pixel before enlargement is first added to the remainder in the Y direction obtained in step 403 for conversion processing in the Y direction (step 40).
6), and the pixel size after expansion in the Y direction ay
(That is, it is divided by the size a in the y direction) to obtain the quotient and the remainder (step 407). Then, the pixels for one line that have been subjected to the enlargement / reduction conversion processing in the X direction in step 405 are drawn by the number of the obtained quotient (for the line), and the remainder is set as the remainder in the next Y direction (step 407). ), And then returning to step 404, it is determined whether the image data in the Y direction is completed.

Here, if the image data in the Y direction is not finished, the above operation is repeated. If the image data in the Y direction is finished, the conversion processing operation in the mode 1 is finished and the step of FIG. Return to 304.

FIG. 10 is a sub-routine for explaining the conversion processing operation of the enlargement in the X direction in the mode 1. In the figure, first, it is judged whether or not the image data in the X direction is completed (step 451).

Here, if the image data in the X direction has ended, the process returns to step 405 in FIG. 6, and if the image data in the X direction has not ended, the image data in the X direction obtained in step 403 has not been enlarged yet. Add the pixel size of (step 45
2), and this is the pixel size ax after enlargement in the X direction
(That is, it is divided by the size a in the x direction) to obtain the quotient and the remainder (step 453). Then, the pixels to be enlarged are drawn by the number of the quotients obtained above, and the remainder is set as the remainder in the next X direction (step 454). Then, the process returns to step 451 to determine whether or not the image data in the X direction is completed. to decide.

Here, if the image data in the X direction is not finished, the above operation is repeated, and if the image data in the X direction is finished, the conversion processing operation of the enlargement in the X direction by the mode 1 is finished. Returning to step 405 in FIG.

When the above conversion process is applied to the case of 1.5 times enlargement of FIG. 9, if each pixel and line before the conversion process of FIG. 9A has a quotient of 1 obtained in steps 407 and 453, 9th
As shown in FIG. 7B, after expansion, they are converted into one pixel and one line, respectively, and when the quotient is two, after expansion, the same pixel and two lines are converted so as to continue.

FIG. 7 is a sub-routine for explaining the conversion processing operation in mode 2. In the figure, step 50
Since steps 1 to 504 are the same as steps 01 to 404 of the mode 1 shown in FIG. 6, description thereof will be omitted. C
The PU 36 returns to step 305 of FIG. 5 when the Y direction image data is judged to have ended in step 504, and when the Y direction image data has not ended, the PU 36 shown in FIG. The conversion processing of the enlargement / reduction of X direction is performed (step 505). When the conversion processing for enlargement / reduction in the X direction is completed, the size of the pixel before enlargement is first added to the surplus in the Y direction obtained in step 503 for the conversion processing in the Y direction (step 506). Is divided by the pixel size ay after expansion in the Y direction to obtain the quotient and the remainder (step 50).
7). Then, the value of the quotient is determined (step 508).

Here, when the value of the quotient is 1, the pixels for one line subjected to the enlargement / reduction conversion processing in the X direction in step 505 are drawn (step 509). If the quotient value is 2 or more, the first 1 pixel is calculated by ORing the 1-line pixel that has undergone the enlargement / reduction conversion processing in the X direction in step 505 and the pixel of the immediately preceding line. The pixels for the line are drawn, and the pixels for one line, which have been subjected to the conversion processing of enlargement / reduction in the X direction, are drawn for the number of remaining quotients (for the line) (step 510). Then, the remainder obtained in step 507 is used as the next remainder in the Y direction (step 511),
Next, returning to step 504, it is determined whether or not the image data in the Y direction is completed.

Here, when the image data in the Y direction is not finished, the above operation is repeated, and when the image data in the Y direction is finished, the conversion processing operation in the mode 2 is finished and the step of FIG. Return to 305.

FIG. 11 is a sub-routine for explaining the conversion processing operation of the enlargement in the X direction in the mode 2. In the figure, first, it is judged whether or not the image data in the X direction is completed (step 551).

Here, if the image data in the X direction has ended, the process returns to step 505 in FIG. 7, and if the image data in the X direction has not ended, the image data in the X direction obtained in step 503 has not yet been enlarged. Add the pixel size of (step 55
2) Further, this is divided by the pixel size ax after expansion in the X direction to obtain the quotient and the remainder (step 553). Then, the value of the quotient is judged (step 554).

Here, when the value of the quotient is 1, one pixel that has undergone conversion processing for enlargement in the X direction is drawn (step 55).
Five). When the value of the quotient is 2 or more, one pixel that has undergone the conversion processing for enlargement in the X direction and one pixel before that pixel
One pixel at the head is drawn by the OR operation, and one pixel subjected to the conversion processing of the expansion in the X direction is drawn by the number of remaining quotients (step 556). Then, the remainder obtained in step 554 is set as the next remainder in the Y direction (step 557),
Next, returning to step 551, it is determined whether or not the image data in the X direction has been completed.

If the image data in the X direction has not been completed, the above operation is repeated. If the image data in the X direction has been completed, the conversion processing operation of the enlargement in the X direction in the mode 2 is completed. Returning to step 505 in FIG.

When the above conversion process is applied to the case of 1.5 times enlargement in FIG. 9, when the quotient obtained in steps 507 and 553 is 1, as shown in FIG. 1
If the quotient is converted to a line and the quotient is 2, the leading 1 after expansion
The pixel and one line are converted by taking the OR logic with the previous pixel and the previous line. Therefore, the image can be made darker than in mode 1, and if there is one line, it can be thickened and unified.

FIG. 8 is a sub-routine for explaining the conversion processing operation of mode 3. In the figure, step 60
Since steps 1 to 604 are the same as steps 401 to 404 of mode 1 shown in FIG. 6, description thereof will be omitted.
If the CPU 36 determines in step 604 that the image data in the Y direction has ended, it returns to step 306 in FIG. 5, and if the image data in the Y direction has not ended, FIG. The conversion processing of the enlargement / reduction in the X direction is performed (step 605). Then, when the conversion processing of enlargement / reduction in the X direction is completed, the size of the pixel before enlargement is first added to the surplus in the Y direction obtained in step 603 for conversion processing in the Y direction (step 606). Is divided by the pixel size ay after expansion in the Y direction to obtain the quotient and the remainder (step 60).
7). Then, the value of the quotient is determined (step 608).

Here, if the value of the quotient is 1, the pixels for one line that have been subjected to the enlargement / reduction conversion processing in the X direction in step 605 are drawn (step 609). If the value of the quotient is 2 or more, the first 1 pixel is ANDed with the 1-line pixel that has been subjected to the enlargement / reduction conversion processing in the X direction in step 605 and the pixel of the immediately preceding line. Pixels for lines are drawn. At this time, when ANDing the four points of the original pixels as shown in FIG. 9 (d), ANDs in the diagonal direction are taken and then those ORs are drawn. To do. Next, the pixels for one line that have been subjected to the conversion processing for enlargement / reduction in the X direction are drawn by the number of the remaining quotients (for the lines) (step 61).
0). Then, the remainder obtained in step 607 is set as the next remainder in the Y direction (step 611), and then the procedure returns to step 604 and Y
It is determined whether the image data of the direction is completed.

Here, if the image data in the Y direction is not finished, the above operation is repeated. If the image data in the Y direction is finished, the conversion processing operation in the mode 3 is finished and the steps in FIG. Return to 306.

FIG. 12 is a sub-routine for explaining the conversion processing operation of the enlargement in the X direction in the mode 3. In the figure, first, it is judged whether or not the image data in the X direction is completed (step 651).

Here, if the image data in the X direction has ended, the process returns to step 605 in FIG. 8, and if the image data in the X direction has not ended, the image data in the X direction obtained in step 603 has not yet been enlarged. Add the pixel size of
2) Further, this is divided by the pixel size ax after the enlargement in the X direction to obtain the quotient and the remainder (step 653). Then, the value of the quotient is determined (step 654).

Here, if the value of the quotient is 1, one pixel that has undergone the conversion processing for enlargement in the X direction is drawn (step 65).
Five). When the value of the quotient is 2 or more, one pixel that has undergone the conversion processing for enlargement in the X direction and one pixel before that pixel
One pixel at the head is drawn by the AND operation, and one pixel that has undergone the conversion processing of the enlargement in the X direction is drawn by the number of remaining quotients (step 656). And step 654
The remainder obtained in step S is set as the remainder in the next Y direction (step 65
7) Next, returning to step 651, it is determined whether or not the image data in the X direction is completed.

Here, if the image data in the X direction is not completed, the above operation is repeated, and if the image data in the X direction is completed, the conversion processing operation of the enlargement in the X direction by the mode 3 is completed. Returning to step 605 in FIG.

When the above conversion process is applied to the case of 1.5 times enlargement of FIG. 9, if the quotient obtained in steps 607 and 653 is 1, as shown in FIG. 1
If the quotient is converted to a line and the quotient is 2, the leading 1 after expansion
Pixel and one line are converted by taking AND logic with the previous pixel and previous line. For this reason, the image can be made thinner than in mode 1, and if there is one line, it can be finely unified.

FIG. 13 is a sub-routine for explaining the conversion processing operation in the reduction mode. In the reduction mode, the same reduction conversion processing is performed regardless of the mode designation.
In the figure, steps 701 to 704 are the same as steps 401 to 404 of mode 1 shown in FIG. If the CPU 36 determines in step 704 that the image data in the Y direction has ended, the CPU 36 returns to any of steps 304 to 306 in the designated mode in FIG. 5, and the image data in the Y direction has ended. If it does not exist, conversion processing of enlargement / reduction in the X direction of FIG. 14 described later is performed (step 705). When the X-direction enlargement / reduction conversion process is completed, one line of pixels subjected to the X-direction enlargement / reduction conversion process is drawn (step 70).
6). At this time, it is possible that the drawing position has not been updated on the previous line. In this case, since the previous line has already been drawn at the drawing position, the drawing content is ORed and the drawing is performed. Next, the size of the pixel before reduction is added to the Y-direction remainder calculated in step 703 (step 70
7) This is divided by the size ay of the pixel after reduction in the Y direction to obtain the quotient and the remainder (step 708). When the obtained quotient is 0, the drawing position in the Y direction is set as the drawing position of the next line without updating the drawing position in the Y direction, and the obtained quotient is 1.
In this case, the drawing position in the Y direction is updated by one to prepare for the drawing of the next line, and the above-obtained remainder is set as the next remainder. Next, returning to step 704, it is judged whether or not the image data in the Y direction is completed.

Here, when the image data in the Y direction is not finished, the above operation is repeated, and when the image data in the Y direction is finished, the conversion processing operation in the reduction mode is finished and the operation shown in FIG. Steps 304-306 for the specified mode
Return to any of.

FIG. 14 is a sub-routine for explaining the conversion processing operation in the reduction mode in the X direction. In the figure, first X
It is determined whether the image data of the direction is completed (step 751).

Here, when the image data in the X direction is completed,
Returning to step 705 in FIG. 13, if the image data in the X direction has not ended, one pixel subjected to the conversion processing for reduction in the X direction is drawn (step 752). At this time, it is possible that the drawing position has not been updated in the previous pixel.
In this case, since the previous pixel has already been drawn at the drawing position, the drawing content is logically ORed to draw.
Then, the size of the pixel before reduction is added to the remainder in the X direction obtained in step 703 (step 753), and this is further reduced to X.
The pixel size after reduction in the direction is divided by ax to obtain the quotient and the remainder (step 754). If the obtained quotient is 0, the drawing position in the X direction is not updated and the above position is set as the next drawing position. If the quotient is 1, the drawing position in the X direction is updated by one. Then, while preparing for the drawing of the pixel next, the remainder obtained above is set as the next remainder (step 755). Next, returning to step 751, it is determined whether or not the image data in the X direction has been completed.

Here, when the image data in the X direction is not finished, the above operation is repeated, and when the image data in the X direction is finished, the conversion processing operation of the reduction in the X direction in the reduction mode is finished. Return to step 705 in FIG.

In addition, in the embodiment, the conversion processing of the image of the mode 1 to the mode 3 can be selected on the panel, but the present invention is
Not limited to this, it is also possible to provide an image supply device that performs image conversion processing only by the function of one of the modes. In addition, the conversion processing for reduction in the X direction is
It can be used in combination with the case of expansion in the Y direction of each mode. Similarly, the conversion processing of expansion in the X direction of each mode is
It goes without saying that it can be used in combination with the case of the direction reduction mode. Further, the X-direction and Y-direction enlargement ratios and reduction ratios can be set to arbitrary magnifications.

Therefore, according to the present invention, even if the desired magnification is a magnification including a decimal point, a line having a uniform and desired thickness corresponding to the image before the conversion processing is provided by the function of each mode regardless of the print start position of the image. An accurate image such as can be formed and supplied to the bitmap memory.

〔The invention's effect〕

As described above, in the present invention, the print start position of the pixel before the conversion process is divided by the size of the pixel after the conversion process to calculate the remainder, and the remainder is added to the size of the pixel before the conversion process, Further, since the number of drawing pixels for each magnification is determined by dividing by the pixel size after conversion processing, there is no variation in the number of pixels existing at the same dot printing position in each line before conversion processing. Even if the magnification includes a decimal point, regardless of the print start position of the image
It is possible to form an accurate image such as a line having a uniform thickness corresponding to the image before the conversion process.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an outline when the image supply device according to the present invention is used in an image recording device such as a laser beam printer, and FIG. 2 is a block diagram showing a configuration of the image supply device shown in FIG. 3 is a flowchart of a main routine for explaining the conversion processing operation of the image supply apparatus shown in FIG. 2, and FIGS. 4 and 5 are flowcharts of a subroutine for explaining the key processing operation and the data processing operation. Sixth
FIG. 8 to FIG. 10 and FIG. 10 to FIG. 14 are flowcharts of subroutines for explaining the processing operation in each mode according to the present invention, and FIG. 9 shows pixels before conversion processing and pixels after conversion processing in each mode. FIG. 15 is a diagram showing an example of a pixel for explaining a conventional example. 11 ... image supply device, 12 ... recording unit, 13 ... power supply, 14 ...
... panel, 18 ... image data, 31 ... host I / F, 32 ...
... Panel I / F, 33 ... Recording unit I / F, 34,35 ... Program memory, 36 ... Central processing unit (CPU), 37 ... RAM, 38 ...
... bitmap memory, 39, 40 ... character pattern memory, 41 ... CPU bus, 42 ... bitmap controller.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshihide Narumi 1275 Iwatsuki, Iwatsuki City, Saitama Prefecture Fuji Zerox Co., Ltd. Iwatsuki Plant (56) Reference JP-A-2-26766 (JP, A) JP HEI 2-81654 (JP, A) JP-A-2-150172 (JP, A)

Claims (4)

(57) [Claims] 1. An image supply device for converting a pixel corresponding to captured image data into a desired size and number and supplying the same to a storage means to form an image corresponding to a recorded image, before an output start position. Dividing the total size of the pixels before the conversion process corresponding to the position of by the size of the pixel after the conversion process,
A first calculation means for calculating a quotient and a remainder; and a remainder calculated by the first calculation means, the pixel size before conversion processing being added, and the addition value being divided by the pixel size after conversion processing. Calculate the quotient and the remainder, add the calculated remainder to the size of the pixel before the conversion process when calculating the next pixel, and divide the added value by the size of the pixel after the conversion process. Second calculation means; pixel number determination means for determining the number of quotients calculated by the second calculation means as the number of drawing pixels; and the conversion processing for the number of drawing pixels determined by the pixel number determination means. An image supply apparatus comprising: a pixel determining unit that determines a data value of a predetermined pixel before as a data value of a drawing pixel. 2. An image supply device for converting a pixel corresponding to captured image data into a desired size and number and supplying the same to a storage means to form an image corresponding to a recorded image, before an output start position. Dividing the total size of the pixels before the conversion process corresponding to the position of by the size of the pixel after the conversion process,
A first calculation means for calculating a quotient and a remainder; and a remainder calculated by the first calculation means, the pixel size before conversion processing being added, and the addition value being divided by the pixel size after conversion processing. Calculate the quotient and the remainder, add the calculated remainder to the size of the pixel before the conversion process when calculating the next pixel, and divide the added value by the size of the pixel after the conversion process. A second calculation unit, a pixel number determination unit that determines the number of quotients calculated by the second calculation unit as the number of drawing pixels, and a case where the number of drawing pixels determined by the pixel number determination unit is 1 When the number of drawing pixels determined by the pixel number determining means is 2 or more, the data of the predetermined pixel before the conversion process is determined as the data value of the drawing pixel. A data value and a pixel immediately before the data value and the predetermined number of pixels The image supply device, characterized in that the data value obtained by the logical multiplication between the data values that comprise a pixel determining means for determining a data value of the drawing pixel. 3. An image supply device for converting a pixel corresponding to captured image data into a desired size and number and supplying the same to a storage means to form an image corresponding to a recorded image, before an output start position. Dividing the total size of the pixels before the conversion process corresponding to the position of by the size of the pixel after the conversion process,
A first calculation means for calculating a quotient and a remainder; and a remainder calculated by the first calculation means, the pixel size before conversion processing being added, and the addition value being divided by the pixel size after conversion processing. Calculate the quotient and the remainder, add the calculated remainder to the size of the pixel before the conversion process when calculating the next pixel, and divide the added value by the size of the pixel after the conversion process. A second calculation unit, a pixel number determination unit that determines the number of quotients calculated by the second calculation unit as the number of drawing pixels, and a case where the number of drawing pixels determined by the pixel number determination unit is 1 Is determined as the data value of the predetermined pixel before the conversion processing as the data value of the drawing pixel, and when the number of drawing pixels determined by the pixel number determining means is 2 or more, the predetermined value before the conversion processing is determined. Pixel data value and this data value and the image immediately preceding the predetermined pixel Image supply apparatus characterized in that it comprises a pixel determining means for determining a data value of the drawing pixel from the data values obtained, the by logical sum of the data values. 4. An image supply device for converting a pixel corresponding to captured image data into a desired size and number and supplying the same to a storage means to form an image corresponding to a recorded image, before an output start position. Dividing the total size of the pixels before the conversion process corresponding to the position of by the size of the pixel after the conversion process,
A first calculation means for calculating a quotient and a remainder; and a remainder calculated by the first calculation means, the pixel size before conversion processing being added, and the addition value being divided by the pixel size after conversion processing. Calculate the quotient and the remainder, add the calculated remainder to the size of the pixel before the conversion process when calculating the next pixel, and divide the added value by the size of the pixel after the conversion process. Second calculation means; pixel number determination means for determining the number of quotients calculated by the second calculation means as the number of drawing pixels; and the conversion processing for the number of drawing pixels determined by the pixel number determination means. First pixel determining means for determining the data value of the previous processed pixel as the data value of the drawing pixel, and when the number of drawing pixels determined by the pixel number determining means is 1, the predetermined pixel before the conversion processing Determine the data as the data value of the drawing pixel, When the number of drawing pixels determined by the determining means is 2 or more, the data value of the predetermined pixel before the conversion process and the logical product of this data value and the data value of the pixel immediately before the predetermined number of pixels are calculated. If the number of drawing pixels determined by the second pixel determining means for determining the data value of the drawing pixel from the obtained data value and the pixel number determining means is 1,
When the data value of the predetermined pixel before the conversion processing is determined as the data value of the drawing pixel, and the number of drawing pixels determined by the pixel number determining means is 2 or more, the data value of the predetermined pixel before the conversion processing. And at least two of the third pixel determining means for determining the data value of the drawing pixel from the data value obtained by the logical sum of this data value and the data value of the pixel immediately preceding the predetermined pixel. An image supply device comprising: a pixel determining unit; and a designating unit that designates a desired pixel determining unit among the pixel determining units.