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A Color Error Diffusion Method

A technology of error diffusion and diffusion method, which is applied in the direction of image communication, electrical components, etc., can solve the problems of inability to deal with multi-channel output color space and general effect, and achieve the effect of strong flexibility, strong adaptability, and reduced distortion

Active Publication Date: 2016-08-17
浙江知多多网络科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method only uses part of the color plane of the output space, and only a simple decision tree method is used in the process of determining the output value, which cannot handle multi-channel output color spaces, and the effect is also average.

Method used

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  • A Color Error Diffusion Method
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Embodiment Construction

[0035] In order to describe the present invention more specifically, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and examples. The binary error diffusion method involved in the present invention and the multi-level grayscale error diffusion method obtained by expanding on this basis have the following forms: are numerous and should not be construed as limited to the implementation examples set forth herein.

[0036] image 3 is a block diagram of the error diffusion method of an implementation example of the present invention, and the symbols with - marks in the figure are vectors, where To reproduce the input image in the device color space, is the output binary color image.

[0037] Step 1 first follow the Figure 4 Convert the original image to an image that reproduces the color space of the device through a color space converter The image has four CMYK color planes, and the value range...

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Abstract

The invention relates to a color error diffusion method. As to general digital printers and printing presses, output colors are limited. The color error diffusion method comprises the steps of performing color conversion on a colorful image to obtain the image of reproducer color space and decomposing the obtained image into a plurality of gray level images of color planes; performing processing by selecting a two-level grayscale color error diffusion method, expanding the selected two-level grayscale color error diffusion method to a multi-level grayscale color error diffusion method; performing quantization and error diffusion processing on the obtained color image in the reproducer color space. According to the color error diffusion method, the embedded multi-level grayscale color error diffusion method is introduced to control the number of the output overlap points, quantization processing is performed in output color space, color distortion caused by complex color conversion is avoided, generation of the overlap points can be effectively controlled, and output demands of color space of any number of color planes can be met.

Description

technical field [0001] The invention belongs to the technical field of image reproduction, and in particular relates to a color error diffusion method. The method is suitable for color image reproduction systems, especially for color digital image printing, image display and other systems. Background technique [0002] General digital printers and printing presses only have very limited colors that can be output, and they cannot accurately reproduce a color digital image with 256 levels of color gradation. Digital halftone technology was created to solve such problems. It is based on the visual characteristics of the human eye and image coloration characteristics, and uses mathematical calculation tools on binary or multi-color binary (including multi-level grayscale) color rendering devices. Technology that accurately reproduces images in continuous tone gradation. This technology can convert a high-resolution color scale image into a low-resolution binary (or multi-value...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/46H04N1/60
Inventor 朱文华杨冰
Owner 浙江知多多网络科技有限公司
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