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Image processing apparatus and image processing method

一种图像处理设备、处理部的技术，应用在图像通信、电视、电气元件等方向，能够解决灰度属性和粒度退化等问题，达到抑制存储器容量、抑制增加、抑制退化的效果

Inactive Publication Date: 2008-06-11
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] That is, for smooth representation of text, lines, etc., the LPI is preferably as high as possible, but if the LPI is too high, the grayscale properties and granularity will degrade somewhat

Method used

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  • Image processing apparatus and image processing method
  • Image processing apparatus and image processing method
  • Image processing apparatus and image processing method

Examples

Experimental program
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Embodiment Construction

[0041] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0042] FIG. 1 is a diagram showing an overall configuration of a printer system according to an exemplary embodiment of the present invention. Here, provided are: an image forming apparatus 1 for expanding input electronic document information into an image and printing the image on paper; and a client PC (Personal Computer) 2 as a host computer for The image forming apparatus 1 provides the electronic document. Image data may be input to the image forming apparatus 1 from an image reader (not shown) other than the client PC 2 .

[0043]The image forming apparatus 1 includes an image processing section 10 for performing predetermined image processing on image data of, for example, an electronic document output from the client PC 2 , and a recording device 30 as the image forming section. For example, the image forming section may be a tandem digital colo...

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PUM

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Abstract

The present invention discloses an image processing apparatus and an image processing method. An image processing apparatus includes a receiving section, an edge detection section and a screen processing section. The receiving section receives image information. The edge detection section detects an edge area from the image information received by the receiving section. The screen processing section performs a screen process, which is based on area coverage modulation, for the image information on a basis of the detection result by the edge detection section. The screen processing section performs a screen process for the edge area detected by the edge detection section with (i) a screen angle, which is equal to that of a screen process performed for a non-edge area other than the edge area, and (ii) a number of lines per inch, which is an integer multiple of that of the screen process performed for the non-edge area.

Description

technical field [0001] The present invention relates to an image processing device and image processing method for generating an image signal representing gray scale by using an Area Coverage Modulation method. Background technique [0002] An image forming apparatus such as a copying machine or a printer using electrophotography, an inkjet system, etc. performs screen process (screen process) on input image information, and outputs a processing result using an output device, the screen process is expressed in terms of drawing dots With or without binary value to artificially reproduce halftone. [0003] From the viewpoint of image quality, documents generated by such image forming apparatuses include various objects such as images of photographs and the like, graphics with gradations, stripes and the like, and texts, lines and the like. [0004] The number of lines per inch (how many identical patterns are contained in each inch) is a representative parameter of screen pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/409H04N1/58
CPCH04N1/4058H04N1/40062H04N1/405H04N1/409H04N5/208
Inventor 浅野和夫美齐津亨斋藤武松尾纮太
Owner FUJIFILM BUSINESS INNOVATION CORP
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