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Visual lossless CMYK dynamic conversion algorithm

A conversion algorithm and dynamic technology, applied in graphics and image conversion, calculation, image data processing, etc., can solve the problems of poor static conversion performance, ink saving, and unsatisfactory average ink, etc., and achieve an obvious optimization effect

Inactive Publication Date: 2015-11-25
嘉兴慧谷信息技术有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of static conversion is poor, and the performance is not good in terms of ink saving, average ink usage, etc.

Method used

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  • Visual lossless CMYK dynamic conversion algorithm
  • Visual lossless CMYK dynamic conversion algorithm
  • Visual lossless CMYK dynamic conversion algorithm

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Experimental program
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Embodiment Construction

[0032] First, some background technologies are introduced;

[0033] 1. Graininess: For a given color in the RGB color space, it corresponds to multiple colors in the CMYK color space. The difference between these multiple colors is mainly reflected in the different values ​​​​of the K channel. For the CMYK color space, K is used to represent the result of mixing the three color channels of C, M, and Y, so some values ​​of the C, M, and Y channels can be reduced and the value of the K color channel can be increased (and vice versa) to generate RGB The same color in the color space. However, the K color channel represents black. The larger the value of this color channel, the closer the pixel in the picture will be to a black point. If the value of the K color channel is too large, even if the corresponding colors in the RGB color space are the same, The result presented by it will produce a grainy feeling, which will affect the visual effect. In the static conversion method, ...

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Abstract

The invention discloses a visual lossless CMYK dynamic conversion algorithm. An active area and a non-active area in an image are calculated based on a weighted entropy filter and a skin probability estimator, the particle structure is obvious is the active area, and the particle structure is not obvious is the non-active area, and the conversion manner of the active area needs to be particularly concerned so as to realize the visual lossless conversion. Therefore, a dynamic CMYK conversion method is realized on the premise of guaranteeing the visual losslessness, and after the conversion, the sum of the four channels of C, M, Y, K is the smallest, and the aim of saving ink is achieved.

Description

technical field [0001] The present invention relates to computer graphics processing technology. Background technique [0002] CMYK is a standard image format used by printers and other hardware. The conversion from rgb, CIELAB and other color spaces to CMYK color space is not unique, and is subject to the limitations of the hardware itself, so the current method is to use the iccprofile in the hardware supporting The conversion table performs static conversions. However, the performance of static conversion is poor, and the performance is not good in terms of ink saving, average ink usage, etc. Therefore, using dynamic transformations to improve performance has become a development direction in this field. Since CMYK loses information compared to RGB space, it is necessary to retain as much information as possible during dynamic conversion and static conversion to achieve visual loss. Contents of the invention [0003] The present invention proposes a visually lossless...

Claims

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Application Information

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IPC IPC(8): G06T3/00
Inventor 盛斌张越青周旭楚蒋斌王伟锋
Owner 嘉兴慧谷信息技术有限公司
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