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Image forming apparatus, and image forming method

一种图像、图像数据的技术，应用在形成可见图像的图像形成装置领域，能够解决判断错误等问题，达到提高处理速度的效果

Active Publication Date: 2009-03-11
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of judging whether the image data is a white paper document based on the compression ratio may also lead to misjudgment because black paper filled with black color information has almost the same compression ratio as white paper filled with white color information

Method used

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  • Image forming apparatus, and image forming method
  • Image forming apparatus, and image forming method
  • Image forming apparatus, and image forming method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0026] FIG. 1 is a diagram showing the configuration of an image forming apparatus according to an embodiment of the present invention. FIG. 1 shows a laser printer as an example of an image forming apparatus. This configuration is also applicable to any image forming apparatus capable of forming visible images other than laser printers. Examples include inkjet printers, image integrators, offset presses, and their MFPs (Multifunction Peripherals).

[0027] The computer of the data processing device 101 shown in FIG. 1 may serve as a supply source for supplying image information to the image forming device 106 or as a control device for the image forming device 106 . The data processing device 101 may be a print server or a thin client. The image forming device 106 is, for example, a laser printer connected to the data processing device 101 via the network 102 . Data and instructions are communicated over network 102 .

[0028] In this embodiment, image information is data...

no. 2 example

[0059] Figure 10 is a flowchart showing the steps of the blank paper judging process according to the second embodiment. In the first embodiment, it is judged that one block image (image data of interest) in the continuous range repeatedly marked as "T" is full of white color information, and then it is judged that it will not be formed visible on the medium (such as paper) by the image forming process. image. In the second embodiment, high-speed white paper judgment can be performed even for color information that is hardly recognizable by humans.

[0060] In the blank paper judging process (step S1000) shown in FIG. 4 of the first embodiment, the Figure 10 The flowchart shown. The processing of steps S2001 to S2003 is the same as Figure 7 The processing in steps S1001 to S1003 is the same.

[0061] In this embodiment, in step S2004, the CPU 305 judges whether or not the compression rate of the block image obtained in step S2003 is equal to or greater than a threshold ...

no. 3 example

[0083] Figure 12 is a flowchart showing the steps of blank paper judgment processing according to the third embodiment. Unlike the second embodiment, Figure 12 The flowchart shown does not include a judgment process of comparing the compression rate of a block image with a threshold. In the third embodiment, it is judged that an image will not be formed on a medium such as paper, or it is judged that an image is contained that is hardly recognizable by humans, by the brightness of a block image in a continuous range having a repeated mark "T" being equal to or greater than a predetermined brightness. color information. Therefore, it is possible to perform blank paper determination processing without calculating the total data amount after block image compression.

[0084] When an OS (Operating System) or the like running on a computer executes part or all of the actual processing according to the instructions of the program code, the processing also realizes the functions...

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Abstract

An image forming apparatus for generating image data of a page divided into small areas continuously in a predetermined direction and forming an image based on the image data, includes a detection unit configured to detect a continuous range of the image data having the same image contents in the page, the page including at least one continuous range, a specifying unit configured to specify image data of interest in the continuous range of the image data detected by the detection unit, and a first determination unit configured to determine based on the image data of interest whether the page is a blank sheet.

Description

technical field [0001] The present invention relates to an image forming apparatus that forms a visible image, and an image forming method. Background technique [0002] In some widely used image forming devices at present, in each image forming process, it is judged whether the image is a white paper, whether the image is a color image or a black and white image, and the total number of output pages of the color image and the number of black and white images are judged. to manage the total number of output pages. The total number of judgment results based on the image forming apparatus is used for output management, output restriction, grasping of running costs, maintenance and billing management, and the like. [0003] The image forming apparatus receives PDL data (page description data), interprets and generates image data for image formation. Image data is sometimes divided into, for example, tile-shaped small areas, and together with additional information, image data...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G21/00G03G15/00B41J29/38
CPCG03G2215/048G03G15/5025H04N1/233H04N2201/33378H04N1/40
Inventor 武石大树
Owner CANON KK