Image grayscale method and storage medium
An image grayscale and image technology, which is applied in the field of image processing to achieve the effects of improving fidelity, good matching, and reducing redundancy.
Active Publication Date: 2020-01-14
SHENZHEN TECH UNIV
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[0005] The technical problem mainly solved by the present invention is how to reduce the computational complexity of the image grayscale algorithm and at the same time reduce the amount of information loss in the grayscale process to improve the fidelity of the grayscale image
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[0044] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Wherein, similar elements in different implementations adopt associated similar element numbers. In the following implementation manners, many details are described for better understanding of the present application. However, those skilled in the art can readily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the application are not shown or described in the description, this is to avoid the core part of the application being overwhelmed by too many descriptions, and for those skilled in the art, it is necessary to describe these operations in detail Relevant operations are not necessary, and they can fully understand the relevant operations according to the description in the specification and genera...
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An image graying method and a storage medium. Downsampling processing is performed on an input color image to obtain the energy of all color channels of a downsampled scaled image, and optimal coefficients of the color channels are obtained according to an iterative algorithm of transform coefficients so as to perform grey level transformation on an original color image according to the optimal coefficients to obtain a gray level image. According to the image graying method, downsampling processing is firstly performed on the color image, so that the color image reduces the redundancy of image information while retaining primary image information, thereby facilitating reducing the computational complexity in the process of obtaining the optimal coefficients in the later period; according to the image graying method, an iterative algorithm is introduced to obtain the optimal coefficients of the color channels, so that there is a good matching degree between the transform coefficients of the color channels and the color image, loss of the image information in the color image graying process can be effectively reduced, the primary image information of the original color image can be retained to the greatest extent, and the fidelity of the gray level image is facilitated to be improved.
Description
technical field [0001] The invention relates to the technical field of image processing, in particular to an image grayscale method and a storage medium. Background technique [0002] Image grayscale processing is a common method for image processing, which mainly refers to the process of converting color images into grayscale images. The RGB color coding method is a common form of color images. The color of each pixel in the image is determined by the three components of R, G, and B, and each component has 255 values, so a pixel can have more than 1600 10,000 (255*255*255) color variation range, while the grayscale image is a special color image when the three components of R, G, and B are the same, and each pixel can have a variation range of 256 colors. Therefore, the grayscale image, like the color image, still reflects the distribution characteristics of the entire image in terms of chromaticity and brightness. In digital image processing, images in various formats are...
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IPC IPC(8): G06T7/90G06T3/40
CPCG06T3/40G06T7/90
Inventor 袁誉乐曹建民赵勇王新安
Owner SHENZHEN TECH UNIV