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Image processing device and image processing method

An image processing device and image processing technology, which are applied in the field of image processing, can solve problems such as restrictions on freedom of expression, and achieve the effect of reducing the feeling of images

Inactive Publication Date: 2015-08-12
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Although it can be called a true color universal design when working hard on the use of color and color matching when making documents, it is not easy to make all users have this awareness in practice
In fact, when users consciously carry out color universal design, not only the freedom of expression is limited, but also the effort required to use bright color matching to improve appeal is much greater than the labor required to find and process the best image.

Method used

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  • Image processing device and image processing method
  • Image processing device and image processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Human color vision refers to color recognition based on stimuli from L cone cytochromes (red response), M cone cytochromes (green response), and S cone cytochromes (blue response). The above-mentioned cone cytochromes of patients with abnormal color vision are out of balance or lose their function, so patients with abnormal color vision have weaker ability to recognize colors than healthy people. In other words, whether the color vision is abnormal depends on whether the input color can be recognized as the color of the red system, the color of the green system, or the color of the blue system.

[0022] figure 1 The structure of the embodiment of the present invention is shown. figure 1 Among them, 101 denotes an image input unit, which is used to acquire images from equipment such as a personal computer or a multifunctional multifunction machine, 102 denotes a hue judgment unit, which is used to judge the hue of image data of an input image, and 103 denotes a color ...

Embodiment 2

[0034] The halftone processing of Embodiment 1 uses an AM dither signal (dither processing), but the present invention is not limited thereto. In addition, an FM dither signal or error diffusion processing may be used as halftone processing. In this case, as in the first embodiment, the resolution of the dithering process or the conversion of the error diffusion process is performed based on the determined hue region.

[0035] Embodiment 2 performs dither processing or error diffusion processing on the input image data, but it is also possible to apply different halftone processing to one image data at the same time. Specifically, the use of FM dithering signals and error diffusion processing are similar in processing results, so it is allowed to use these two processing at the same time. However, AM dither signals and FM dither signals, and between AM dither signals and error diffusion processing are different in processing type, so they are not allowed to be used at the same...

Embodiment 3

[0038] As described above, the present invention expresses different colors by changing the screen ruling or resolution of the halftone process in each hue. Therefore, in parts where the mesh angle or dot pattern is different, the grayscales such as grayscale patterns are continuous. Sexuality is affected, and the resulting unexpected stereoscopic vision effect will make it impossible for patients with abnormal color vision to distinguish color differences.

[0039] In contrast, in Example 3, the mesh angles in the respective hue regions are made the same, and the halftone dot patterns are based on the same tone (same tendency). Figure 4A It is an example in which the mesh angle (mesh dithering processing) is different, Figure 4B This is an example in which halftone dot patterns are different.

[0040] The above-mentioned embodiment does not imply a uniform output color, that is, mesh angles in each version of CMYK. For example, red is represented by M and Y, and green is ...

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Abstract

An image processing system that facilitates process of color universal design that enables people with color amblyopia to recognize color difference as image pattern without changing characteristic of coloration and gradation and people with no disabilities who look the same image to feel less discomfort. A hue determining unit 102 determines hue of image data, and a selecting unit 105 selects halftone processing in accordance with the determined hue. If the selected halftone processing is dithering process that uses AM dithering, a halftone processing unit 106 executes halftone processing with different line per inch depending on the determined hue.

Description

technical field [0001] The present invention relates to an image processing device and an image processing method for color universal design processing. Background technique [0002] Color universal design is a design that is convenient for patients with abnormal color vision. At present, there are existing color universal design technical solutions, such as converting the color matching on important device parts such as operation panels and operation screens into colors that are easy to identify for patients with abnormal color vision. In addition, in the field of image output devices, Patent Document 1 (JP 2003-223635 A) discloses a technical solution for converting the color matching of printed documents into colors that are easily recognized by patients with abnormal color vision. In addition, there is a technical proposal of adding different patterns or textures for each color disclosed in Patent Document 2 (JP Patent No. 4228670). [0003] However, although the above-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/405H04N1/52H04N1/60
CPCH04N1/52
Inventor 平野政德
Owner RICOH KK
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