High dynamic range image compression method based on mixed tone mapping algorithm
A high dynamic range, high dynamic image technology, applied in video processing and image fields, can solve the problems of insufficient preservation of image color information and image naturalness, low dynamic image color distortion, poor image contrast, etc.
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[0057] refer to figure 1 , the implementation steps of the present invention are as follows:
[0058] Step 1: Input Image
[0059] Input an image in .hdr format (HDR) that cannot be displayed clearly on a common low dynamic display device.
[0060] Step 2: Generation of image brightness information:
[0061] In order to maintain the integrity of image color information reconstruction, here we only compress the brightness information of the image, first we get its brightness information from the original high dynamic color image,
[0062] Lworld=0.27·R+0.67·G+0.06·B
[0063] Among them, Lworld is the brightness information of the high dynamic image, and R, G and B are the pixel values of the R, G, and B color channels of the input high dynamic image.
[0064] Step 3: Global linear mapping algorithm based on image content:
[0065] The global tone mapping algorithm can very well reconstruct the overall effect of the image. Among them, the linear mapping algorithm has rece...
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