JP2008290362A - Printing controller and image forming system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently rasterize print data when making printing based on multi-valued image data. <P>SOLUTION: A rasterizing section 33 color separates intermediate type print data and generates rasterized data for each of YMCK. A rasterized data transferring section 34 transfers image data (M, C, and K) other than that of the generated color in its charge to other RIP units 12M to 12K, and the image data (Y) in its charge to a rasterized data receiving section 35 of its own unit. The rasterized data receiving section 35 receives the rasterized data of the color (Y) in its charge, generated in its own unit, and rasterized data of the color (Y) in its charge, which are transferred from rasterized data transferring sections of the other units. A rasterized data reconciling section 36 reconciles the image data of the color in its charge, generated in its own unit, with the image data in its charge, generated in the other units. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a print control apparatus and an image forming system for controlling a printing operation of an image output apparatus.

  In a normal printer, print data in PDL (Page Description Language) format received from the host device is converted into intermediate format data inside the print control device, rasterized, and printed to the print mechanism unit. And print processing. In the case of an inexpensive apparatus, all processing is performed by a configuration having only one RIP (Raster Image Processing) unit for performing rasterization processing. However, an ultra-high-speed printer or the like has a plurality of RIP units. As a result, the processing speed is increased.

  Depending on the operation, the print data may be color or monochrome, and the intermediate format data inside the device may be generated in binary or multi-value. It varies depending on configuration, production, and settings. However, in any configuration, print data is finally sent to the printing mechanism unit to perform printing, and rasterization processing is also performed in the process up to that point.

  In general, this rasterization process requires sophisticated mathematical operations and the like, and is a process that requires a lot of time in a series of printing processes of the apparatus, and the printing performance greatly depends on this rasterizing process. For this reason, various methods have been proposed for improving the efficiency of rasterization processing by performing parallel / asynchronous processing of rasterization processing (multiple processing by multitasking, etc.) (see, for example, Patent Document 1). . This patent document 1 discloses a print control apparatus using a multi-thread control method for improving color processing efficiency.

  However, even if parallel / asynchronous processing is performed in a series of printing processes, if the apparatus configuration is such that all the processing is performed by one RIP unit, the rasterization processing still takes much time. There is a problem that the limit of speeding up of processing is lowered.

  Therefore, a method is used in which a plurality of independently operable RIP units are provided in one print control apparatus, and for example, RIP units are assigned to each color of CMYK to improve the efficiency of rasterization processing. It has been. However, even in such a print control apparatus having a plurality of RIP units, in order to generate rasterized data of the assigned color from multi-value intermediate format data in each RIP unit, color separation of multi-value intermediate format data is required. To generate rasterized data other than the assigned color. Therefore, when the input image data is multi-valued data, there is a problem that even if a plurality of RIP units are provided, the efficiency of distributed processing cannot be sufficiently exhibited.

JP 2000-141771 A

  In the conventional print control apparatus described above, when printing processing is performed based on multi-value image data, the same image data is transferred to a plurality of RIP units, and rasterized data for each color is generated. There is a problem that the efficiency of the rasterizing process is poor.

  An object of the present invention is to provide a print control apparatus and an image forming system capable of improving the efficiency of rasterization processing when printing processing is performed based on multi-valued image data.

[Print control device]
In order to achieve the above object, a printing control apparatus of the present invention is a printing control apparatus having a plurality of color conversion execution processing units provided for each printing color,
The plurality of color conversion execution processing units are respectively
Generating means for generating image data for each print color by color-separating input multi-value print data;
Transfer means for transferring image data other than the assigned color generated by the generation means to another color conversion execution processing unit;
Receiving means for receiving image data of the assigned color transferred from the transfer means of another unit;
Arbitration means for arbitrating between the image data of the assigned color generated by the generation unit of the own unit and the image data of the assigned color of the other unit received by the receiving means.

  In the present invention, when the input print data is a multi-value image, the image data other than the assigned color obtained by color-separating the multi-value print data is transferred to another unit and generated in the other unit. Since the image data of the assigned color is received from another unit, it is possible to prevent the process of generating the image data for each print color by separating the input print data by color separation. Therefore, according to the present invention, it is possible to improve the efficiency of rasterization processing when printing processing is performed based on multi-valued image data.

Preferably, the print control apparatus according to the present invention includes a determination unit that determines whether the input print data is a binary image or a multi-value image.
And a distribution unit that distributes the input print data to the color conversion execution processing unit for each data unit when the determination unit determines that the image is a multi-valued image.

[Image forming system]
The image forming system of the present invention has a plurality of color conversion execution processing units provided for each print color, and each of the plurality of color conversion execution processing units converts input multi-value print data into color. Generating means for generating image data for each print color by separating, transfer means for transferring image data other than the assigned color generated by the generating means to other color conversion execution processing units, and other units Receiving means for receiving the assigned color image data transferred from the transferring means, the assigned color image data generated by the generating unit of the own unit, and the assigned color image of the other unit received by the receiving means. A print control device having mediation means for mediation with data;
And an image output device whose printing operation is controlled by the print control device.

Preferably, the print control device is
Determination means for determining whether the input print data is a binary image or a multi-value image;
And a distribution unit that distributes the input print data to the color conversion execution processing unit for each data unit when the determination unit determines that the image is a multi-valued image.

  As described above, according to the present invention, it is possible to obtain an effect that it is possible to improve the efficiency of rasterization processing when printing processing is performed based on multi-valued image data.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an image forming system according to an embodiment of the present invention.

  The image forming system according to this embodiment includes an image forming apparatus 10 and a terminal device 20 that functions as a host device.

  The terminal device 20 generates print data in the PDL format and transmits it to the image forming apparatus 10. The image forming apparatus 10 receives the print data transmitted from the terminal device 20 and outputs an image corresponding to the print data on the printing paper.

  The image forming apparatus 10 according to the present embodiment includes a code unit 11, RIP (Raster Image Processing) units 12Y to 12K, mechanism control units 13Y to 13K, and printing mechanism units 14Y to 14K corresponding to CMYK colors. It is composed of The RIP units 12Y to 12K function as a plurality of color conversion execution processing units provided for each CMYK print color.

  The code unit 11 includes a data conversion unit 15 and an intermediate format data distribution unit 16.

  The data conversion unit 15 converts print data in a PDL (Page Description Language) format input from the terminal device 20 into intermediate format print data.

  The intermediate format data distribution unit 16 determines whether the intermediate format print data from the data conversion unit 15 is a binary image or a multi-value image, and if it is determined to be a multi-value image, the input print data is Distribution is performed for each page unit to the RIP units 12Y to 12K. For example, the intermediate format data distribution unit 16 transfers the first page data only to the RIP unit 12Y, transfers the second page data only to the RIP unit 12M, and transfers the third page data only to the RIP unit 12C. To distribute. In this embodiment, print data is distributed for each page unit. However, the print data may be distributed for other data units other than pages.

  In this way, when the intermediate format print data is a multi-valued image, the intermediate format data distribution unit 16 transfers the print data of a certain page to only one RIP unit. All pages are transferred to the RIP units 12Y to 12K. Here, the attribute data is data including information on page attributes such as resolution and paper size.

  Since the print data of the binary image is already decomposed for each color, the intermediate format data distribution unit 16 corresponds to each print data when the input print data is a binary image. It distributes to the RIP units 12Y to 12K.

  The code unit 11, the RIP units 12Y to 12K, and the mechanism control units 13Y to 13K function as a print control device for controlling the printing operation of the printing mechanism units 14Y to 14K. The printing mechanism units 14Y to 14K function as image output devices whose printing operations are controlled by the print control device.

  Next, FIG. 2 shows a hardware configuration of the RIP units 12Y to 12K shown in FIG. In FIG. 2, only the configuration of the RIP unit 12Y will be described for the sake of simplicity, but the other RIP units 12M to 12K have the same configuration.

  As shown in FIG. 2, the RIP unit 12 </ b> Y includes a CPU 21, a memory 22 configured by a RAM, a storage device 23 configured by a hard disk drive (HDD), and a communication IF (interface) 24. ing. These components are connected to each other via a control bus 25.

  The communication IF 24 transmits / receives data to / from the other RIP units 12M to 12K, the code unit 11, and the mechanism control unit 13Y via the network.

  The CPU 21 controls the operation of the RIP unit 12Y by executing predetermined processing based on the print control program stored in the memory 22 or the storage device 23.

  FIG. 3 is a block diagram showing a functional configuration of the RIP unit 12Y realized by executing the above print control program.

  As shown in FIG. 3, the RIP unit 12Y includes an intermediate format data receiving unit 31, a buffer memory 32, a rasterization processing unit 33, a rasterized data transfer unit 34, a rasterized data receiving unit 35, and a rasterized data arbitration process. A unit 36 and a print data sending unit 37 are included.

  The intermediate format data receiving unit 31 receives the intermediate format print data transferred from the intermediate format data distribution unit 16 and stores it in the buffer memory 32. Then, the intermediate format data receiving unit 31 requests the rasterization processing unit 33 to perform rasterization processing on the intermediate format print data stored in the buffer memory 32.

  The buffer memory 32 is a memory for temporarily storing intermediate format print data received by the intermediate format data receiving unit 31.

  When the rasterization processing unit 33 receives a rasterization processing request from the intermediate format data receiving unit 31, the rasterization processing unit 33 performs rasterization processing of the intermediate format data stored in the buffer memory 32. Specifically, the rasterization processing unit 33 generates rasterized data (raster format image data) for each print color by color-separating the intermediate format print data.

  The rasterized data transfer unit 34 transfers image data (M, C, K) other than the assigned color generated in the rasterization processing unit 33 to the other RIP units 12M to 12K. Further, the rasterized data transfer unit 34 transfers the image data (Y) of the assigned color generated by the rasterization processing unit 33 to the rasterized data receiving unit 35.

  The rasterized data receiving unit 35 receives the assigned color (Y) rasterized data from the rasterized data transfer unit 34 of its own unit and the assigned color (Y) rasterized data transferred from the rasterized data transfer unit of the other unit.

  The rasterized data arbitration processing unit 36 performs mediation between the image data of the assigned color generated by the rasterization processing unit 33 of the own unit and the rasterized data data of the assigned color of the other unit received by the rasterized data receiving unit 35. Do. Specifically, the rasterized data arbitration processing unit 36 prints the rasterized data data by comparing and referring to the attribute data included in the received rasterized data and the attribute data transferred from the intermediate format data receiving unit 31. Perform processing to rearrange in page order.

  The print data sending unit 37 sends the print data after the arbitration processing is performed by the rasterized data arbitration processing unit 36 to the mechanism control unit 13Y.

  Next, the operation of the RIP unit 12Y in the image forming system of this embodiment will be described in detail with reference to the drawings.

First, the operation of the code unit 11 will be described with reference to the flowchart of FIG.
When the data conversion unit 15 receives PDL format print data from the terminal device 20 (step S101), the data conversion unit 15 converts the received PDL format print data into intermediate format print data (step S102).

  Then, the intermediate format data distribution unit 16 determines whether the intermediate format print data converted by the data conversion unit 15 is a multi-value image or a binary image (step S103). If it is determined that the intermediate format print data is a binary image, the intermediate format data distribution unit 16 assigns the intermediate format data and attribute data of the assigned color to all the RIP units 12Y to 12K. Are transferred (step S104).

  If it is determined in step S103 that the intermediate format print data is a multi-valued image, the intermediate format data distribution unit 16 checks the free capacity of the buffer memory of each of the RIP units 12Y to 12K (step S105). After the attribute data is transferred to all the RIP units 12Y to 12K (step S106), intermediate format data that is actual data is transferred only to the RIP unit having the largest free space in the buffer memory (step S107). .

Next, the operation of the intermediate format data receiving unit 31 will be described with reference to the flowchart of FIG.
When the intermediate format data receiving unit 31 receives data from the intermediate format data distribution unit 16 (step S201), the intermediate format data receiving unit 31 determines whether the received data is only attribute data or includes actual data in the intermediate format (step S201). Step S202).

  If it is determined in step S 202 that the data received from the intermediate format data distribution unit 16 includes actual data in the intermediate format, the intermediate format data receiving unit 31 stores the received intermediate format data in the buffer memory 32. In step S203, the rasterization processing unit 33 is requested to rasterize the stored intermediate format data (step S204).

  When it is determined in step S202 that the data received from the intermediate format data distribution unit 16 does not include the actual data in the intermediate format and is only attribute data, the intermediate format data reception unit 31 rasterizes the received attribute data. The data is directly transferred to the data receiving unit 35 (step S205).

Next, operations of the rasterization processing unit 33 and the rasterized data transfer unit 34 will be described with reference to the flowchart of FIG.
When the rasterization processing unit 33 receives a rasterization processing request from the intermediate format data receiving unit 31 (step S301), the rasterization processing unit 33 determines whether the rasterization processing request is for a multi-valued image or binary for an image (step S301). S302).

  If this rasterization processing request is for a multi-valued image, the rasterization processing unit 33 executes rasterization processing of multi-valued intermediate format data stored in the buffer memory 32 (step S303). Then, the rasterized data transfer unit 34 transfers the rasterized data of Y color as the assigned color to the rasterized data receiving unit 35 of the own unit together with the attribute data, and the rasterized data of M, C, K colors other than the assigned color. Are transferred together with the attribute data to the rasterized data receivers of the RIP units 12M to 12K which are other units (step S304).

  In step S <b> 302, when the rasterization processing request from the intermediate format data receiving unit 31 is for a binary image, the rasterization processing unit 33 executes the rasterization processing of the binary intermediate format data stored in the buffer memory 32. (Step S305). Then, the rasterized data transfer unit 34 transfers the rasterized data and attribute data to the rasterized data receiving unit 35 of its own unit (step S306).

Next, the operation of the rasterized data receiving unit 35 will be described with reference to the flowchart of FIG.
When the rasterized data receiving unit 35 receives data from any one of the host devices of the rasterized data transfer unit 34 of its own unit, the rasterized data transfer unit of another unit, or the intermediate format data receiving unit 31 of its own unit (step S401) It is determined whether only attribute data has been received or whether both attribute data and rasterized data have been received (step S402).

  If it is determined in step S402 that only the attribute data has been received, the rasterized data receiving unit 35 receives the rasterized data corresponding to the received attribute data from the rasterized data transfer unit from another RIP unit. Waiting (step S403), when rasterized data is transferred from the rasterized data transfer unit of another RIP unit, this rasterized data is received (step S404). Then, the rasterized data receiving unit 35 transfers the attribute data and the received rasterized data to the rasterized data arbitration processing unit 36 (step S405).

  When it is determined in step S402 that both attribute data and rasterized data have been received, the rasterized data receiving unit 35 transfers the received attribute data and rasterized data to the rasterized data arbitration processing unit 36 (step S405).

Finally, the operations of the rasterized data arbitration processing unit 36 and the print data sending unit 37 will be described with reference to the flowchart of FIG.
When the rasterized data arbitration processing unit 36 receives the attribute data and the rasterized data from the rasterized data receiving unit 35 (step S501), the rasterized data arbitration processing is performed using the attribute data to process the plurality of rasterized data in the order of print pages. A rearrangement process is performed (step S502). Then, the print data sending unit 37 transmits the print data after the arbitration processing by the rasterized data arbitration processing unit 36 to the mechanism control unit 13Y (step S503).

  According to the image forming system of the present embodiment, when the print data converted into the intermediate format data by the data conversion unit 15 is a multi-value image, the intermediate format data distribution unit 16 of the code unit 11 includes the RIP unit 12Y. The print data is distributed to the RIP units 12Y to 12K for each page unit by transmitting the print data only to the RIP unit having the largest capacity of the buffer memory among ˜12K. In each RIP unit 12Y to 12K, image data other than the assigned color obtained by color-separating the multi-value print data is transferred to the other unit, and the assigned color image data generated in the other unit. Is received from other units. Therefore, according to the present embodiment, it is possible to prevent the process of generating the image data for each print color by separating the input print data by color separation. As a result, when the printing process is performed based on the multivalued image data, the efficiency of the rasterizing process can be improved.

  In the image forming system according to the present embodiment, since the multi-value intermediate format data is not transmitted to all the RIP units 12Y to 12K, it is only necessary to transmit each data to one RIP unit. The amount of data transfer between the unit 11 and the RIP units 12Y to 12K can also be reduced.

1 is a block diagram illustrating a configuration of an image forming system according to an embodiment of the present invention. 2 is a block diagram showing a hardware configuration of a RIP unit 12Y in the image forming system according to the embodiment of the present invention. FIG. FIG. 3 is a block diagram illustrating a functional configuration of a RIP unit 12Y in the image forming system according to the embodiment of the present invention. It is a flowchart which shows operation | movement of the code unit 11 in one Embodiment of this invention. 6 is a flowchart illustrating an operation of an intermediate format data receiving unit 31 in the image forming system according to the embodiment of the present invention. 4 is a flowchart showing operations of a rasterization processing unit 33 and a rasterized data transfer unit 34 in the image forming system according to the embodiment of the present invention. 4 is a flowchart illustrating an operation of a rasterized data receiving unit 35 in the image forming system according to the embodiment of the present invention. 4 is a flowchart illustrating operations of a rasterized data arbitration processing unit and a print data sending unit 37 in the image forming system according to the embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 11 Code unit 12Y-12K RIP unit 13Y-13K Mechanism control part 14Y-14K Printing mechanism part 15 Data conversion part 16 Intermediate format data distribution part 20 Terminal apparatus 21 CPU
22 memory 23 storage device 24 communication IF (interface)
25 control bus 31 intermediate format data receiving unit 32 buffer memory 33 rasterization processing unit 34 rasterized data transfer unit 35 rasterized data receiving unit 36 rasterized data arbitration processing unit 37 print data sending unit S101 to S107 steps S201 to S205 steps S301 to S306 steps S401 ~ S405 step S501 ~ S503 step

Claims (4)

A print control apparatus having a plurality of color conversion execution processing units provided for each print color,
The plurality of color conversion execution processing units are respectively
Generating means for generating image data for each print color by color-separating input multi-value print data;
Transfer means for transferring image data other than the assigned color generated by the generation means to another color conversion execution processing unit;
Receiving means for receiving image data of the assigned color transferred from the transfer means of another unit;
Arbitration means for arbitrating between the image data of the assigned color generated by the generation unit of the own unit and the image data of the assigned color of the other unit received by the receiving means;
A printing control apparatus. Determination means for determining whether the input print data is a binary image or a multi-value image;
The print control apparatus according to claim 1, further comprising a distribution unit that distributes input print data to the color conversion execution processing unit for each data unit when the determination unit determines that the image is a multi-value image. . A plurality of color conversion execution processing units provided for each printing color, and each of the plurality of color conversion execution processing units performs color separation on the input multi-valued print data to generate an image for each printing color; Generation means for generating data, transfer means for transferring image data other than the assigned color generated by the generation means to another color conversion execution processing unit, and assigned color transferred from the transfer means of the other unit Receiving means for receiving the image data, and arbitrating means for arbitrating between the image data of the assigned color generated by the generating means of the own unit and the image data of the assigned color of the other unit received by the receiving means A printing control device comprising:
An image output device whose printing operation is controlled by the print control device;
An image forming system. The printing control device is
Determination means for determining whether the input print data is a binary image or a multi-value image;
4. The image forming system according to claim 3, further comprising a distribution unit that distributes the input print data to the color conversion execution processing unit for each data unit when the determination unit determines that the image is a multi-valued image. .

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