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Image rendering method based on color shift and correction

An image coloring, color image technology, applied in image data processing, 2D image generation, texture/color, etc., can solve the problem that color cannot maintain spatial consistency, and achieves overcoming color space inconsistency, convergence and improvement of coloring accuracy. , fast and accurate coloring effect

Active Publication Date: 2016-07-13
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide an image coloring method based on color transfer and correction, and solve the problem that the coloring process at each pixel point in the prior art is independent during the image coloring process, resulting in The problem of color not maintaining spatial consistency during the transfer process to achieve accurate and fast colorization of images

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  • Image rendering method based on color shift and correction
  • Image rendering method based on color shift and correction
  • Image rendering method based on color shift and correction

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Embodiment Construction

[0022] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0023] like figure 1 As shown, the present invention has designed a kind of image coloring method based on color transfer and correction, and this method is based on source color image and target gray-scale image, and this method mainly comprises four parts: 1. conversion between colors; 2. initial coloring; 3. Color correction is performed on the points with spatial inconsistencies; ④ color image output. From the beginning of image space selection to the end of image coloring output, under the condition of ensuring that the color does not cross the border, realize the color diffusion in the local area, and achieve the purpose of fast and accurate correction of color inconsistencies. The steps are as follows:

[0024] Step 1, color space conversion; in the color space selection part, select the appropriate color space——YCbCr space, through the conversion from R...

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Abstract

The invention discloses an image rendering method based on color shift and correction. The image rendering method comprises the steps of carrying out space conversion and obtaining component information of brightness and color at any pixel point of a target gray scale image; reading out any one pixel point t in the target gray scale image; selecting a pixel point s in a source color image by using a non-local approach, with a window determined by the pixel point s having similar variance features and discrete Fourier transform features to those of a window determined by the pixel point t; carrying out initial rendering for a color value of the pixel t according to a color value of the pixel s; establishing a coupling total variation model, solving the model to obtain an optimal color value, taking the solved optimal value as a corrected color value, and keeping a brightness value unchanged; and repeating the above steps, correcting each pixel point t of the target gray scale image, and outputting the corrected image. The invention can well overcome the problem of inconsistent color space after rendering, and achieves automatic, quick and accurate rendering.

Description

technical field [0001] The invention relates to an image coloring method based on color transfer and correction, belonging to the technical field of image processing. Background technique [0002] In information transmission and exchange, images are an important communication medium. In the human visual system, color is one of the important factors reflecting visual cognition. Since the sensitivity of the human eye to grayscale information is far less than that of color information, it is hoped that grayscale images can be turned into color images to enhance visual effects, that is, image colorization technology, also known as grayscale image colorization. Image colorization is the computer-assisted process of adding color to still images or video sequences. At present, it has a wide range of applications in the fields of film and television, medical treatment, space exploration, industry, and scientific research. At the same time, the research on image coloring methods ha...

Claims

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Application Information

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IPC IPC(8): G06T11/00
CPCG06T11/001
Inventor 金正猛赵敏钧郭少健冯子朋杨真真
Owner NANJING UNIV OF POSTS & TELECOMM
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