Image compression method based on wavelet transformation
A technology of wavelet transform and image compression, applied in the information field, can solve the problems of increasing the theoretical delay of the encoding system, occupying a large number of cycles, increasing the number of clock cycles, etc., to achieve hardware pipeline operations, reduce the number of cycles, and reduce delays Effect
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[0022] The applicant has found through research and use that in the prior art, in order to realize embedded coding, JPEG2000 adopts bit-plane scanning one by one in the process of encoding wavelet coefficients, and performs block coding (EBC) by scanning each bit-plane three times. After all the coefficient blocks are encoded, the encoded coefficient blocks are optimized and truncated (OT) within the range of the image block. This method will greatly increase the number of clock cycles required for encoding, and optimize the encoded coefficient blocks. Truncation (OT) increases the theoretical delay of the encoding system. In addition, although this method can precisely control the bit rate of each individual image, there is no effective way to stably control the quality of the image sequence composed of multiple images.
[0023] Aiming at the above-mentioned defects, the present invention proposes a coding method for scanning one bit plane at a time. This method can cancel the...
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