An Image Deblocking Filter Method Based on Second Order Gradient
A deblocking and second-order gradient technology, applied in the field of image processing, can solve the problems of long deblocking time and high computational complexity, improve filtering efficiency and overall encoding efficiency, reduce encoding block response, and prevent additional information loss Effect
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[0047] The present invention provides a deblocking filtering method based on the second-order gradient of the image. For the convenience of describing the content of the present invention, firstly, the term definitions are as follows:
[0048] Definition 1: Traditional JPEG image compression method
[0049] The traditional JPEG image compression method is to compress the image in blocks according to the JPEG image compression standard, which includes the classic image block method, the two-dimensional discrete cosine transform method of the image block, the quantization and inverse quantization of the transform coefficient block method, entropy coding method of coefficient blocks, two-dimensional inverse discrete cosine transform method of coefficient blocks, and method of synthesizing a complete image with compressed image blocks, etc. For the specific description process, see "JPEG (Joint Photographic Experts Group): ISO / IEC IS 10918 –1 / ITU-T Recommendation T.81, Digital Com...
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