Color stretching method and system for rgb mode image
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A pattern image and stretching system technology, applied in the field of color stretching methods and systems, can solve problems such as large amount of computation, and achieve the effect of saving the calculation process and reducing the amount of color stretching computation
Active Publication Date: 2017-12-12
TENCENT TECH (SHENZHEN) CO LTD
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[0006] In the traditional method, when the fragment renderer in the graphics processor performs color stretching on the RGB mode image, it needs to perform stretching calculation on the R color value, G color value and B color value of all texel elements of the texture of the image, for An image with a width of M pixels and a height of N pixels needs to be stretched and calculated M×N×3 times, and the amount of calculation is very large
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[0025] Such as figure 1 Shown, in one embodiment, a kind of color stretching method of RGB mode image, comprises the following steps:
[0026] Step S102, acquiring the color value of the texel currently processed by the fragment renderer in the texture of the RGB mode image. The color values include R color values, G color values, and B color values.
[0027] In one embodiment, before step S102, the color stretching method of the above-mentioned RGB mode image further includes the following steps: converting the RGB mode image to be processed into a texture; uploading the texture of the RGB mode image to a graphics processor; The processor preprocesses the texture of the uploaded RGB mode image; obtains the texture elements of the preprocessed texture one by one and sends them to the fragment renderer.
[0028] After the texture of the RGB mode image is uploaded to the graphics processor, the graphics processor performs related processing on the texture. The rasterization...
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Abstract
A color stretching method for an RGB mode image, comprising the following steps: acquiring the color value of a texture element currently processed by a fragment renderer in a texture of an RGB mode image; reading the column corresponding to the color value from the RGB stretched value texture The color stretching value stored on the above; construct the color stretching image of the RGB mode image according to the read color stretching value; the color value within the value range of the corresponding base color is sequentially stored in the channel of the RGB stretching value texture The color stretch value. In the above method, the fragment renderer only needs to find the color stretch value stored in the column corresponding to the corresponding channel in the RGB stretch value texture of the color value of the currently processed texel to obtain the color of the currently processed texel The stretch value saves the calculation process of the color stretch value, thereby reducing the amount of color stretch calculation. In addition, a color stretching system for images in RGB mode is also provided.
Description
【Technical field】 [0001] The invention relates to image processing technology, in particular to a color stretching method and system for RGB mode images. 【Background technique】 [0002] Most colors can be produced by combining red, green, and blue colors with a certain color value. Therefore, red, green, and blue are also called primary colors. The color range of red, green, and blue is 0-255. The image in RGB mode includes R channel, G channel and B channel, which are used to store the R color value, G color value and B color value of all pixels in the image respectively, and the R color value, G color value and B color value of the pixel represent respectively Composite the red, green, blue color values of the pixel's color. When calculating the R color value, G color value, and B color value, the R color value, G color value, and B color value are generally normalized, that is, divided by 255, and the decimal obtained after dividing by 255 is used as The correspondin...
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