JP4090920B2 - Image processing control apparatus and image processing control method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an image processing control apparatus for controlling image processing.And image processing control methodIn particular, an image processing control device for setting a scanner and a processor for performing image processing such as FAXAnd image processing control methodAbout.
[0002]
[Prior art]
Conventionally, as a method for controlling image processing of input image data, a signal indicating an image range in the sub-scanning direction and the main scanning direction (hereinafter referred to as FGATE and LGATE) and a signal for starting an image in the main scanning direction are used. A synchronization signal (hereinafter, LSYNC) was used. FIG. 14 is a diagram showing an overview of a conventional digital copying machine. FIG. 15 is a diagram for explaining the operation of the reading optical system of the digital copying machine. When the original 101 is directly placed on the original table 102 of the digital copying machine 100 and set so that the reading surface faces downward (book reading), the reading optical system 200 is arranged in the horizontal direction when viewed from the front of the copying machine in the figure. The original image is read after being conveyed. At this time, first, the original is illuminated by the light source 202, and the reflected light is sequentially converged and reflected through the mirror 203 and the lens and relay mirror group 204, and is read by an image line sensor (hereinafter, CCD) 205.
[0003]
FIG. 16 is a diagram for explaining the relationship between a document, a control signal, and an effective image area in document image input, (a) is a diagram for explaining the relationship between the document and the control signal, and (b) is a diagram of the document image. It is a figure explaining scanning, and (c) is a figure which shows the timing of a control signal group and an effective image area | region. The sub-scanning range signal FGATE shown in FIG. 16A is a signal indicating the image range in the sub-scanning direction, that is, the scanning direction of the light source 202 and the mirror 203 shown in FIG. Similarly, the main scanning synchronization signal LSYNC is a synchronization signal that serves as a signal of the starting point of the line in the reading direction of the CCD 205 in FIG. 15, that is, the main scanning direction. The main scanning range signal LGATE is a signal indicating the image range of the document reading surface in the main scanning direction.
[0004]
In reading the original in the main scanning direction, as shown in a specific example of image scanning in FIG. 16B, the CCD 205 scans the line 1, line 2, line 3,... In the main scanning direction. The temporal relationship between these FGATE, LSYNC, and LGATE and image data is shown in FIG. In this way, processing is performed by replacing the data of the two-dimensional document image with image data on the time axis.
[0005]
FIG. 17 is a functional block diagram of the digital copying machine. A host CPU (Central Processing Unit, hereinafter abbreviated as CPU) 310 that gives instructions for overall processing sends processing and setting instructions to each block. Image data read by the CCD 205 is first sent to the scanner 311, subjected to A / D conversion and corrected for scanner characteristics, and subjected to image processing such as filter, mask processing, and error diffusion in the image processing unit 312. If necessary, it is sent to the image storage unit 313. In the masking process, unnecessary areas are masked according to the actual image size (document in FIG. 16A) range in the LGATE. The image storage unit 313 exchanges image data with the image processing unit 312, secures a temporary memory area for image editing for at least one copy output paper (hereinafter referred to as transfer paper), and the image processing unit By receiving image data from 312 and having a large-capacity storage medium such as an HD (hard disk), a large number of image data can be stored. In addition, it is possible to further increase the storage amount of image information by having a compression / decompression function of image data. The printer 314 receives the image data stored in the image storage unit 313 via the image processing unit 312 and outputs it to transfer paper.
[0006]
As the image processing unit 312, an ASIC (Application Specific Integrated Circuit) that has been designed specifically for the purpose of a specific application rather than a general-purpose CPU for reasons such as cost and speed of processing has been conventionally designed. Has improved performance. However, with the recent increase in IC operation speed, the problem of design burden for each product due to shortened product cycle period, and the spread of core embedded ICs, digital signal processors (hereinafter abbreviated as DSP) and An image processor specialized for image processing has begun to be used.
[0007]
For example, as described in Japanese Patent Application No. 2001-126656, a DSP basically includes a signal processing unit (a processor unit including an ALU (Arithmetic and Logic Unit)) and a program storage unit for operating the signal processing unit. It is composed of (memory) and is positioned as middleware with both hardware and software. The DSP has a plurality of ALUs (Arithmetic and Logic Units) and has a SIMD (Single Instruction Multi Data) structure in which a plurality of ALUs execute simultaneously in parallel on a series of image data, and is not suitable for parallel processing. By using dedicated hardware for processing such as error diffusion, processing can be performed with higher speed and flexibility than conventional ASICs.
[0008]
FIG. 18 is a diagram illustrating a configuration example of a conventional DSP. The DSP 315 includes a processor unit for performing actual signal input / signal processing / signal output and a memory unit for incorporating a program for determining the operation of the processor, and performs various processes according to the program downloaded to the memory. . In this example, the image processing unit 312 is a DSP 315. The CPU 10 has a ROM that stores a control program therein, and a program to be downloaded to the DSP 315 is stored in the ROM.
[0009]
FIG. 19 is a flowchart showing the flow of downloading a program to the DSP. The CPU 310 downloads data to the DSP 315 at the time of boot processing when the power is turned on or after the end of the reset command. As shown in FIG. 19, the CPU 310 stores the contents of the DSP program area in the CPU 310 in the order of boot processing for each processing, setting for upstream processing, setting for DSP, and setting for downstream processing. (Install).
[0010]
[Patent Document 1]
Japanese Patent Application No. 2001-126656
[0011]
In image processing using a DSP, image processing is performed in units that are processed in parallel. As described above, when image data is exchanged with an external device such as an image storage unit, input / output image data is always input / output. If the size of the file is fixed, there is no need for resetting, and there is no need to be aware of it on the host side, so processing can be performed smoothly. However, when the sizes of received image data are different, it is necessary to change the effective image data amount in the main scanning direction.
[0012]
[Problems to be solved by the invention]
However, the processor control method using a DSP in the conventional example generally describes a method for downloading a program, but it has not been known about image size conversion in image data transfer.
[0013]
  The present invention has been made in view of the above problems, and an object of the present invention is to provide an image processing control apparatus that can set the amount of image data to be input and can exchange images of any data amount with peripheral devicesAnd image processing control methodIs to provide.
[0014]
  Another object of the present invention is to provide an image processing control apparatus capable of transferring an image of an arbitrary data amount with a peripheral device.And image processing control methodIs to provide.
[0015]
  Another object of the present invention is to provide an image processing control device capable of stably transferring image data.And image processing control methodIs to provide.
[0016]
[Means for Solving the Problems]
  In order to achieve the above object, an invention according to claim 1 is an image processing control apparatus for setting a processor for reading and processing an original image,
  Necessary for the processor to perform image processing on the document image using the image data width in the main scanning direction for reading the document image and the processing unit processed by the processor as parameters.SIMD numberA processing number calculation means for calculatingSIMD numberThe image data width setting means for setting the image data width to be image processed,The processing number setting means for setting whether the required SIMD number calculated by the processing number calculation means is fixed or variable depending on the processing contents of the image processing by the processor;An image processing control device comprising:
[0017]
  According to the first aspect of the present invention, it is necessary for the processor to perform image processing on the document image using the image data width in the main scanning direction for reading the document image and the processing unit processed by the processor as parameters.SIMD numberThe processing number calculation means to calculate the required calculationSIMD numberSince the image data width setting means sets the image data width to be image-processed, the data width of the input image data can be set, so that image processing that can exchange any amount of image data with the peripheral device is possible. A control device can be provided.
According to the first aspect of the present invention, the processing number setting means is provided for setting whether the required number of SIMDs calculated by the processing number calculation means is fixed or variable depending on the processing contents of the image processing by the processor. Therefore, it is possible to add control for selecting whether the change in the amount of image data is fixed or variable, so that efficient transmission / reception of image data between the peripheral device and / or its own output device is possible. A possible image processing control device can be provided.
[0018]
According to a second aspect of the present invention, in the image processing control apparatus according to the first aspect, the processing number calculation means further uses a scaling factor of the read original as a parameter.
[0019]
According to the second aspect of the present invention, since the processing number calculation means can further output an image by changing the magnification of the read document as a parameter, the image data can be exchanged with the peripheral device. Can be provided.
[0020]
According to a third aspect of the present invention, in the image processing control apparatus according to the first or second aspect, the processing number calculation means further uses the read original size and / or transfer paper size as a parameter. And
[0021]
According to the third aspect of the present invention, since the processing number calculation means can further use the read original size and / or the transfer paper size as parameters, the scaling factor can be calculated from the original size and the transfer paper size. It is possible to provide an image processing control apparatus capable of transferring an arbitrary amount of image data with a peripheral device even when the size and the transfer paper size are different.
[0024]
  Claims4The invention according to claim 13In the image processing control device according to any one of the above, after setting the image data width to be image-processed, start setting means for performing processing reception start setting in the processor in synchronization with the image data reading start signal , Further provided.
[0025]
  This claim4According to the present invention, after the image data width to be processed is set, the processor further includes start setting means for performing processing reception start setting in synchronization with the image data reading start signal, thereby providing a sub-scanning start signal. Therefore, it is possible to provide an image processing control apparatus that can operate more stably.
[0026]
  Claims5The invention according to claim 14The image processing control apparatus according to any one of the above, further comprising: an end setting unit configured to set a process reception end to the processor in synchronization with an image processing end signal of the image data.
[0027]
  This claim5According to the invention, the apparatus further includes end setting means for setting the processing acceptance end in the processor in synchronization with the image processing end signal of the image data, so that the sub-scan end signal is set and operated. Since the end specification can be expanded and an erroneous operation due to an input of an unnecessary control signal can be prevented at the rear end of the image data, an image processing control apparatus capable of a more stable operation can be provided.
According to a sixth aspect of the present invention, there is provided an image processing control method executed by an image processing control apparatus for setting a processor for reading and processing an original image, wherein the image data width in the main scanning direction for reading the original image is set. And a processing number calculating step in which the processor calculates the number of SIMDs necessary for image processing of the original image using the processing unit processed by the processor as a parameter, and the calculated number of SIMDs Whether the required number of SIMDs calculated by the processing number calculation means is fixed or variable depending on the image data width setting step for setting the image data width to be processed and the processing contents of the image processing by the processor. An image processing control method comprising: a processing number setting step to be set.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
  An image processing control apparatus according to the present invention will be described below with reference to the accompanying drawings.And image processing control methodThe preferred embodiment will be described in detail.
[0029]
(Embodiment 1)
FIG. 1 is a functional block diagram of an image processing control apparatus according to Embodiment 1 of the present invention. The CPU 10 sends processing and setting instructions to each block. The scanner 11 performs A / D conversion on the read image data to correct the scanner characteristics, and sends it to the DSP 15. The DSP 15 sets (installs) a program for image processing from the CPU 10, performs image processing such as filter, mask processing, and error diffusion on the image data received from the scanner 11, and outputs the image data to the image storage unit 13. The image storage unit 13 receives a designated image width setting of image data received from the DSP 15 from the CPU 10 and receives an image from the DSP 15. At the time of output, LSYNC, FGATE, and LGATE signals corresponding to the size of the accumulated image data are output and transmitted to the DSP 15. When printing, the printer 14 receives the image data from the DSP 15 and outputs it to the transfer paper.
[0030]
FIG. 2 is a diagram for explaining the relationship between image data and control signals in the image processing control apparatus according to the first embodiment, and FIG. 2 (a) is a diagram for explaining a setting operation performed by the CPU for the DSP and the image storage unit. Yes, (b) is a diagram for explaining the timing of image reading and setting. That is, FIG. 2 shows the relationship between the image data exchanged by the DSP 15 and the control signal when reading the image. Here, as shown in FIG. 2B, when the image data is transferred from the DSP 15 to the image storage unit 13, the designated image width is sent from the CPU 10 to the image storage unit 13 according to the number of pixels instead of having no LGATE signal. Set. In addition, when the DSP 15 receives image data from the image storage unit 13 and performs image processing, the amount of image data changes, so the setting of the image data amount may need to be changed. Therefore, the CPU 10 sets an image amount for one line in the DSP 15. This is because there is a case where the DSP 15 does not receive the LGATE signal in the same manner as the image storage unit 13 other than the method in which the DSP 15 grasps the amount of image data by the LGATE signal. By specifying the number of SIMDs, the DSP 15 can know how much data stored in the buffer (FIFO) should be processed even when there is no LGATE signal.
[0031]
FIG. 3 is a functional block diagram of another image processing control apparatus according to Embodiment 1 of the present invention. This image processing apparatus performs image processing using two DSPs. In this case, the CPU 10 makes settings for the DSP 15 a that performs image processing on read data from the scanner 11 and the DSP 15 b that performs image processing on transfer data from the image storage unit 13.
[0032]
4A and 4B are diagrams for explaining the structure of SIMD (Single Instruction Multi Data) in the DSP. FIG. 4A shows the relationship between input / output data and SIMD processing, and FIG. 4B shows SIMD and processor elements (PE). The relationship is shown. As shown in FIG. 4B, one SIMD includes a plurality of processor elements (PE). The PE is composed of an arithmetic unit (ALU), its register, a line memory (FIFO), and the like, and one PE is responsible for processing image data of one pixel. By arranging a plurality of PEs in parallel, it is possible to perform processing for the number of PEs simultaneously, and the number of processed image data (number of pixels) per SIMD is determined.
[0033]
Regarding the relationship between input data and SIMD processing shown in FIG. 4A, image data from the outside is buffered once in an input line memory (FIFO) 401, and then processed for each processing unit of 1 SIMD. The processed data is stored in the output FIFO 402. After this is performed for all image data, the processed data is output from the FIFO 402.
[0034]
5A and 5B are diagrams for explaining the relationship between the document reading surface, the control signal, the effective image area, and the SIMD. FIG. 5A is a diagram illustrating the relationship between the document and the control signal, and FIG. 5B is the image scanning direction. (C) is a diagram showing the relationship between the effective image area and SIMD. In this case, an LGATE signal is used, and the target range of SIMD processing is an LGATE section, and processing is performed by dividing the main scanning direction for each SIMD with respect to image data obtained by reading a read original surface.
[0035]
In this case, the SIMD number S required for processing an effective image is calculated as follows.
[0036]
S (number of SIMD) = number of image data per line / number of processes per SIMD
However, in this case,
(1) If it is not divisible as an integer value, the quotient is rounded up. This is because the effective area image cannot be covered if the fractional part is truncated.
[0037]
(2) If there is a function to perform processing with reference to surrounding pixels, it is necessary to acquire each other's SIMD area by the amount of the peripheral reference at the boundary of SIMD.
Number of processes per SIMD = PE number per SIMD−image overlap with SIMD on both sides.
[0038]
In this case, for example, in the case of referring to surrounding pixels to process the target pixel, such as filter processing, the image at the extreme end of SIMD cannot be processed correctly, so reference to the previous SIMD or the subsequent SIMD Since the necessary pixels need to be taken into SIMD, the overlap is reduced. That is, the actual number of PEs in the SIMD that the DSP 15 has is not all usable, but the number of pixels necessary for the peripheral reference of each process is subtracted from the number of processes per SIMD for the original effective image. This is because it must be done.
[0039]
Thus, the number of image data set by the CPU 10 is S (the number of SIMD) calculated by the above equation, and the program is processed by the program based on the number of DSP 15. The CPU 10 internally calculates the above formula and overlap. Further, the image width represented by the pixel is calculated by back-calculating the above formula “S (number of SIMD) = number of image data per line / number of processes per SIMD” “number of image data per line = S (number of SIMD) × 1 SIMD”. It can be understood as “number of hits”.
[0040]
Here, the CPU 10 includes a program for calculating the above formula and calculates the above formula. The CPU 10 also has a program for calculating the image data width and setting it in the DSP 15 to calculate the image data width. The program in which the CPU 10 calculates the above formula constitutes the processing number calculation means in the present invention, and the program in which the CPU 10 calculates the image data width and sets it in the DSP 15 constitutes the image data width setting means in the present invention.
[0041]
(Embodiment 2)
The second embodiment performs efficient image output by setting whether the image size to be output is fixed or variable depending on the device that outputs the image.
[0042]
FIG. 6 is a functional block diagram of the image processing control apparatus according to the second embodiment of the present invention. Here, the same reference numerals as those in FIG. 1 denote the same components, and the description will be mainly made of the differences from the first embodiment. The DSP 15 outputs the data after image processing to the printer 14 and / or the external device 16.
[0043]
The printer 14 outputs the image data to transfer paper. This output is, for example, an operation of a copy function provided in the same copying machine that reads the image with a scanner and then outputs it to a transfer sheet. On the other hand, the external device 16 outputs the data received from the DSP 15 in various ways according to the purpose. For example, when the configuration of the present invention is used for scanner reading, the external device 16 outputs the data to a monitor such as a PC, and in the case of a network printer, a specific device is selected and transferred in the same manner as the printer 14. In the case of a server or the like, it is an external device that stores data as electronic data.
[0044]
Considering the case of the printer 14 or the external device 16 considered as the output side here, the printer 14 is a device integrated with a device that reads by the scanner 11, and if the image data is transferred to the size of the transfer paper in the DSP 15. Even if it is not transferred, if the size of the transfer paper is set by the printer 14 and the corresponding effective area is received, or if it can be cut out after being received, the DSP 15 can fix the SIMD number. By fixing the number of SIMDs, the host CPU does not need to be aware of the image size, and wasteful hardware and software resources can be omitted.
[0045]
However, when the output side is the external device 16, it is desirable that the image output from the DSP 15 has a requested image size in advance in order to compensate for the processing of the effective image area and the transfer data according to the specifications of each device. FIG. 7 is a flowchart for explaining the operation of the image processing control apparatus according to the second embodiment of the present invention. First, the host CPU 10 determines whether the output image size is fixed or varies depending on whether the output system is its own printer 14 or the external device 16 (for example, a personal computer (PC)) in the process at that time. Is determined (step S701). If it is fixed (Yes in step S701), a fixed value is set (step S702), or if it is the same as the previous time, the fixed value setting operation is omitted. If the determination result is “change” (No in step S701), the SIMD number is calculated and set by the above-described method (step S703).
[0046]
In this way, it is possible to efficiently perform image processing by determining whether the output image size is fixed or fluctuating and setting in accordance with each method.
[0047]
(Embodiment 3)
The image processing control apparatus according to the third embodiment is configured to perform more reliable image processing by transmitting an image input signal to a DSP that receives image data.
[0048]
  In an image processing control device, when image data and a control signal are associated with each other and I / F is performed between devices to transfer an image, naturally, the operation of the control signal is signaled, and each device has image data. It is assumed that each process is performed by recognizing the image as a valid image area. However, if a device that outputs an image to the DSP 15 outputs a control signal without observing this premise, the DSP 15 cannot determine the image data indicated by the control signal, and therefore performs processing based on a control signal that does not violate the premise. Or the program set at that time is not suitable for the specifications of the image data.AndUnexpected behavior may occur.
[0049]
FIG. 8 is a sequence diagram illustrating an operation example of the image processing control apparatus according to the third embodiment of the present invention. First, a startup request is notified from the outside to the CPU 10 during startup. Upon receiving the startup notification, the CPU 10 performs boot processing to the DSP 15, the upstream processing 801 that outputs image data to the DSP 15, and the downstream processing 802 that receives and processes image data from the DSP 15, and then sets each component Will continue. Here, only the settings for the DSP 15 are shown, and the CPU 10 performs processing settings, that is, downloads a program to the DSP 15. When the download of the program is completed, the DSP 15 returns a setting completion response to the CPU 10. However, at this time, even if image data is output, the DSP 15 does not receive an image.
[0050]
Here, the CPU 10 finishes all the preparations, and immediately before starting the image processing, inputs an image input signal 1 (Kick) to the DSP 15, and the DSP 15 is ready to receive image data. Then, the CPU 10 starts processing by sending a processing command to the upstream processing 801, sends processing signals to the DSP 15 as needed, and the DSP 15 processes the received signals and sends them to the downstream processing 802. The kick is automatically accepted when image data is input, and then automatically turned off when the image data processing ends, and the kick is set for each image sheet. In this example, two jobs are shown. The first time shows that two images from the upstream processing 801 have been sent, and the second time shows that one image has been sent. In addition to setting for each different process as described above, it is possible to eliminate unnecessary input by signaling image input, and stable image processing can be performed.
[0051]
(Embodiment 4)
The image processing control apparatus according to the fourth embodiment forcibly terminates reception of an image by the processing end setting from the CPU 10 to the DSP 15 and allows the host CPU 10 to control the image end position and forcibly accepts image processing. Thus, the image processing operation is stabilized.
[0052]
FIG. 9 is a sequence diagram illustrating an operation example of the image processing control apparatus according to the fourth embodiment of the present invention. As shown in FIG. 9, in the sequence example of the operation of the image processing control apparatus according to the fourth embodiment, an image is received by the processing start setting (enable setting), and the image is forcibly accepted by the processing end setting from the CPU 10 to the DSP 15. It is possible to end. As a result, the host CPU 10 can also control the image end position. The image processing operation can be stabilized by forcibly terminating the image processing reception.
[0053]
(Embodiment 5)
The image processing control apparatus according to the fifth embodiment is configured such that even if the document is further scaled, the image can be scaled and output.
[0054]
FIG. 10 is a functional block diagram of an image processing control apparatus according to Embodiment 5 of the present invention. The same reference numerals perform the same functions as in the first to fourth embodiments. In the fifth embodiment, different configurations and functions will be mainly described. The DSP 15 is set with an image processing program from the CPU 10, performs image processing such as filter, mask processing, and error diffusion on the image data received from the scanner 11, and outputs it to the image storage unit 13. The image storage unit 13 receives the designated image width setting of the image data received from the DSP 15 from the CPU 10 and receives an image from the DSP 15. At the time of output, LSYNC, FGATE, and LGATE corresponding to the size of the accumulated image data are output and passed to the DSP 15. When printing is finally performed, the printer 14 receives image data from the DSP 15 and outputs the image data to a transfer sheet.
[0055]
FIG. 11 is a functional block diagram of another image processing control apparatus according to the fifth embodiment of the present invention. Here, image processing is performed using two DSPs. In this case, the CPU 10 makes settings for the DSP 15c that performs image processing on read data from the scanner and the DSP 15d that performs image processing on transfer data from the image storage unit.
[0056]
Here, when the user tries to change the size of the image by designating the scaling factor, the scaling process itself is set by the DSP 15c in the path that receives the image data from the scanner 11 and reaches the image storage unit 13, and the scaling process is performed. The doubled image data is stored in the image storage unit 13.
[0057]
In this case, the number of SIMD necessary for the DSP 15d that receives the image data from the image storage unit 13 to process the effective image is calculated as follows.
[0058]
S (number of SIMD) = number of image data for one line × magnification / number of processes per SIMD
However, in this case,
(1) If the quotient is not divisible and the decimal part appears, round up the decimal part. This is because the effective area image cannot be covered if it is discarded.
[0059]
(2) When there is a function to process by referring to the peripheral pixels, it is necessary to acquire each other's SIMD area only for the peripheral reference at the boundary of SIMD.
Number of processes per SIMD = number of PEs per SIMD-image overlap with SIMD on both sides
It becomes.
[0060]
(Embodiment 6)
The image processing control apparatus according to the sixth embodiment can exchange arbitrary image data even if the document size and the transfer paper size are different.
[0061]
FIG. 12 is a functional block diagram of an image processing control apparatus according to Embodiment 6 of the present invention. FIG. 13 is a functional block diagram of another image processing control apparatus according to the sixth embodiment of the present invention. In the other image processing control apparatus shown in FIG. 13, two DSPs, a DSP 15f that performs image processing and transmits the processed image to the image storage unit 13, and a DSP 15g that receives image data from the image storage unit 13. Is provided. In the image processing control apparatus according to the sixth embodiment, the user selects a transfer sheet, and scales and outputs the document according to the transfer sheet size.
[0062]
In this case, the number of SIMDs necessary for the DSP 15e (FIG. 12) and the DSP 15g (FIG. 13) that receive the image data from the image storage unit 13 to process an effective image is calculated as follows.
[0063]
S (number of SIMD) = number of image data of one line × transfer sheet size ÷ original size ÷ number of processes per SIMD
However, in this case,
(1) When the quotient is not divisible by an integer and a decimal point appears, the decimal point is rounded up. This is because the effective area image cannot be covered if it is discarded.
[0064]
(2) When there is a function to process by referring to the peripheral pixels, it is necessary to acquire each other's SIMD area only for the peripheral reference at the boundary of SIMD.
Number of processes per SIMD = number of PEs per SIMD-image overlap with SIMD on both sides
It becomes.
[0065]
【The invention's effect】
  As explained above, claim 1And 6According to the invention, since the data width of the input image data can be set, there is an effect that it is possible to provide an image processing control apparatus that can exchange an arbitrary amount of image data with a peripheral device.
Further, according to the inventions according to claims 1 and 6, since it is possible to add control for selecting whether the change of the image data amount is fixed or variable, it is possible to connect the peripheral device and / or the output device owned by the peripheral device. It is possible to provide an image processing control apparatus that can efficiently exchange image data between the two.
[0066]
According to the second aspect of the present invention, since the image can be scaled and output, the image processing control apparatus capable of transferring the scaled image data amount with the peripheral device can be provided.
[0067]
According to the third aspect of the present invention, there is an effect that it is possible to provide an image processing control device capable of transmitting / receiving an arbitrary amount of image data to / from peripheral devices even when the document size and the transfer paper size are different.
[0069]
  Claim4According to the invention, as the control for setting and operating the sub-scan start signal, the specification of image data transmission / reception can be expanded, and erroneous operation due to the input of unnecessary control signals can be prevented, so that image processing capable of more stable operation is possible. The control device can be provided.
[0070]
  Claim5According to the invention, the operation end specification can be expanded by controlling the operation by setting the sub-scan end signal, and an erroneous operation due to an input of an unnecessary control signal can be prevented at the rear end of the image data, so that a more stable operation is possible. An effect is provided that a simple image processing control device can be provided.
[Brief description of the drawings]
FIG. 1 is a functional block diagram of an image processing control apparatus according to a first embodiment of the present invention.
FIGS. 2A and 2B are diagrams for explaining a relationship between image data and control signals in the image processing control apparatus according to the first embodiment, and FIG. 2A is a diagram for explaining a setting operation performed by a CPU on a DSP and an image storage unit; Yes, (b) is a diagram for explaining the timing of image reading and setting.
FIG. 3 is a functional block diagram of another image processing control apparatus according to the first embodiment of the present invention.
4A and 4B are diagrams for explaining the configuration of SIMD in a DSP, where FIG. 4A shows the relationship between input data and SIMD processing, and FIG. 4B shows the relationship between SIMD and a processor element (PE).
FIGS. 5A and 5B are diagrams for explaining a relationship between a document reading surface, a control signal, an effective image area, and SIMD. FIG. 5A is a diagram illustrating a relationship between a document and a control signal, and FIG. (C) is a diagram showing the relationship between the effective image area and SIMD.
FIG. 6 is a functional block diagram of an image processing control apparatus according to a second embodiment of the present invention.
FIG. 7 is a flowchart for explaining the operation of the image processing control apparatus according to the second embodiment of the present invention;
FIG. 8 is a sequence diagram illustrating an operation example of an image processing control apparatus according to a third embodiment of the present invention.
FIG. 9 is a sequence diagram illustrating an operation example of the image processing control apparatus according to the fourth embodiment of the present invention.
FIG. 10 is a functional block diagram of an image processing control apparatus according to a fifth embodiment of the present invention.
FIG. 11 is a functional block diagram of another image processing control apparatus according to a fifth embodiment of the present invention.
FIG. 12 is a functional block diagram of an image processing control apparatus according to a sixth embodiment of the present invention.
FIG. 13 is a functional block diagram of another image processing control apparatus according to Embodiment 6 of the present invention.
FIG. 14 is a diagram showing an overview of a conventional digital copying machine.
FIG. 15 is a diagram illustrating the operation of a reading optical system of a digital copying machine.
FIGS. 16A and 16B are diagrams illustrating the relationship between a document, a control signal, and an effective image area in document image input, FIG. 16A is a diagram illustrating a relationship between the document and the control signal, and FIG. It is a figure explaining scanning, and (c) is a figure which shows the timing of a control signal group and an effective image area | region.
FIG. 17 is a functional block diagram of a conventional digital copying machine.
FIG. 18 is a diagram illustrating a configuration example of a conventional DSP.
FIG. 19 is a flowchart showing a flow of downloading a program to a conventional DSP.
[Explanation of symbols]
10,310 CPU
11,311 scanner
13,313 Image storage unit
14,314 Printer
15, 15a, 15b, 15c, 15d, 15e, 15f, 15g DSP
101 manuscript
102 Document table
202 Light source
205 CCD
312 Image processing unit
401, 402 FIFO
801 Upstream processing
802 Downstream processing

Claims (6)

An image processing control apparatus for setting a processor for reading and processing a document image,
Processing number calculation means for calculating the number of SIMDs required for the processor to image-process the document image, using as parameters the image data width in the main scanning direction for reading the document image and the processing unit processed by the processor; ,
Image data width setting means for setting the image data width to be image-processed according to the calculated required SIMD number ;
The processing number setting means for setting whether the required SIMD number calculated by the processing number calculation means is fixed or variable depending on the processing contents of the image processing by the processor;
An image processing control apparatus comprising:   The image processing control apparatus according to claim 1, wherein the processing number calculation unit further uses a scaling factor of the read document as a parameter.   The image processing control apparatus according to claim 1, wherein the processing number calculation unit further uses the read original size and / or the transfer paper size as a parameter. After setting the image data width to be image processed, the image data in synchronism with the read start signal, according to claim 1 to 3, characterized in that the start setting means for processing reception start setting to the processor, further comprising The image processing control apparatus according to any one of the above. Wherein in synchronization with the image processing end indication of the image data, the image processing according to the termination setting means for processing acceptance end setting to the processor, any one of claims 1-4, characterized in that it comprises further Control device. An image processing control method executed by an image processing control device for setting a processor for reading and processing a document image,
  A processing number calculation step in which the processor calculates the number of SIMDs necessary for image processing of the document image, using the image data width in the main scanning direction for reading the document image and the processing unit processed by the processor as parameters. ,
  An image data width setting step for setting the image data width to be image-processed according to the calculated number of required SIMDs;
  A processing number setting step for setting whether the required number of SIMDs calculated by the processing number calculation means is fixed or variable depending on the processing content that the processor performs image processing;
  An image processing control method comprising:

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