A method for automatically adjusting gamma curves based on image gray statistics
An image grayscale and automatic adjustment technology, which is applied in the direction of image communication, TV system components, color TV components, etc., can solve the problem that the image does not have adjustability, does not have automatic adaptability, and cannot adapt to video very well. Image content and other issues, to achieve the effect of improving subjective experience, improving transparency, and improving brightness
Active Publication Date: 2018-12-11
杭州雄迈集成电路技术股份有限公司
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[0002] At present, when processing traditional video images, the gamma transformation adopted is to manually adjust the gamma curve, or to select one or several gamma curves. This method does not have automatic adaptability, and cannot be well adapted when the environment changes. Adapting to the content of the video image makes the effect of the image not very adjustable. Therefore, there is an urgent need for a gamma curve with real-time automatic adjustment function to automatically adapt to the content of the video image
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[0019] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following examples.
[0020] figure 1 The No. 1 curve is the traditional gamma0 curve, and the No. 2 curve is the automatically generated gamma line. figure 2 is the gray distribution map after the traditional gamma0 transformation, image 3 To automatically generate the grayscale distribution map after gamma transformation, where image 3 The gray distribution in the figure 2 is evenly distributed.
[0021] Such as Figure 1-3 Shown is a specific embodiment of a method for automatically adjusting the gamma curve based on image grayscale statistics, the embodiment obtains a method for automatically adjusting the gamma curve based on image grayscale statistics, the method includes the following steps:
[0022] Step 1): Statistics of brightness distribution of video images: Firstly, carry out gray-scale statistics on v...
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The invention discloses a method for obtaining automatic adjustment gamma curve based on image gray level statistics, belonging to the field of video image processing. At first, carrying out the graylevel statistics of the video image to obtain the bit width Nbit, gray scale rk and wide resolution w, high H of the video image, calculating image statistics of the video, judging the statistical data of the video image, pefroming interpolation operation, performing normalization approval to obtain a new gray-scale statistical mapping table, performing summing operation and convervting of the new gray-level statistical mapping table to obtain a valid gamma1 curve, performing weighted summing of Gamma 1 curve and traditional gamma 0 curve. The invention can carry out real-time conversion on images, has image gray self-adaptation, can improve brightness of dark images, reduce brightness of bright images, stretch low contrast images into high contrast images, and stretch high contrast images more evenly.
Description
technical field [0001] The invention relates to a method for automatically adjusting gamma curves, more specifically, to a method for automatically adjusting gamma curves based on image grayscale statistics, and belongs to the field of video image processing. Background technique [0002] At present, when processing traditional video images, the gamma transformation adopted is to manually adjust the gamma curve, or to select one or several gamma curves. This method does not have automatic adaptability, and cannot be well adapted when the environment changes. Adapting to the content of the video image makes the effect of the image not very adjustable. Therefore, a gamma curve with real-time automatic adjustment function is urgently needed to automatically adapt to the content of the video image. Contents of the invention [0003] In order to solve the above-mentioned problems in the prior art, the present invention provides a device capable of increasing the brightness of d...
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CPCH04N5/202
Inventor 甘文操
Owner 杭州雄迈集成电路技术股份有限公司