Picture encoding method based on lossy compression chain code
A technology of image encoding and encoding method, which is applied in the field of image encoding based on lossy compression chain codes, can solve the problems of low compression rate and achieve the effect of improving compression rate, reducing storage space occupation, and being easy to implement
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[0022] Such as figure 2 Shown, method of the present invention comprises the following steps:
[0023] Step 1: Scan the contour boundary pixels of the image to be coded sequentially from left to right and from top to bottom, use the pixel at the upper left corner of the contour as the starting coding point, and save the coordinates of the starting coding point.
[0024] Step 2: take the initial coding point as the current pixel, search for the first 16 adjacent pixels separated from the current pixel by 1 pixel in a predetermined direction (such as clockwise or counterclockwise), and use the absolute 16-direction coding method to The 16 adjacent pixels are encoded, and the encoded 16-direction code values are stored. Such as image 3 As shown, the chain code in the absolute 16-direction coding mode moves along the boundary pixels of the image contour in a manner of 16 adjacent to it with a distance of one pixel. Each moving direction passes through 2 pixels or 3 pixels. W...
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