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1/5 small-wave core optimizing design computing method based on JPEG2000 picture compression

An image compression and optimization design technology, applied in computing, image coding, image data processing, etc., can solve problems such as lack of optimized design algorithms

Inactive Publication Date: 2007-06-13
XI AN JIAOTONG UNIV
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Problems solved by technology

Regarding the research on extending the wavelet kernel of the JPEG2000 standard, especially the optimization design of the wavelet kernel based on the JPEG2000 standard, there has been no official publication of research work in this area after searching for patents and related papers, let alone an optimal design algorithm in this area

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  • 1/5 small-wave core optimizing design computing method based on JPEG2000 picture compression
  • 1/5 small-wave core optimizing design computing method based on JPEG2000 picture compression
  • 1/5 small-wave core optimizing design computing method based on JPEG2000 picture compression

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Embodiment Construction

[0017] The following subsections introduce the specific implementation steps of the technical solution.

[0018] According to the technical scheme of the present invention, first construct a 7 / 5 biorthogonal wavelet filter bank that satisfies the exact reconstruction condition of a symmetrical compact support, and this filter bank is made up of four filters, namely low-pass decomposition filter And synthesis filter, high-pass analysis filter and synthesis filter, they form a two-channel filter bank, which is also a sub-band coding system. Among them, due to the complementary low-pass filter and high-pass filter at the decomposition end, the complementary low-pass filter and high-pass filter at the synthesis end, and the requirement of precise reconstruction conditions (PR) for decomposition and synthesis, the low-pass synthesis filter and high-pass The coefficients of the analysis filter, high-pass synthesis filter and low-pass analysis filter only have sign differences, so th...

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Abstract

The algorithm can be in use for expanding kernel of wavelet based on JPEG2000 standard. In subband coding system, the algorithm uses first order Markov procedure of Gaussian white noise as mathematical model of the input image, and based on gain guide line of Vaidyanathan subband coding, the method designs optimal kernel of wavelet in theory in use for JPEG2000 image compression. Then, based on self-defining function in second portion of JPEG2000 standard, the method embeds universal mathematical general expression of kernel of wavelet needed to design to uptodate verification software Jasper1.701.0 provided by JPEG2000 standard. Afterwards, based on signal-noise ratio rule of peak value, the method optimizes kernel of wavelet designed based on gain guideline of Vaidyanathan subband coding. The method is applicable to new kernel of wavelet based on JPEG2000 standard. Compression image can be image in any classes from general image in natural image, medical image etc.

Description

technical field [0001] The invention belongs to the technical field of digital image processing and VLSI design thereof, and relates to an image compression algorithm, in particular to a 7 / 5 wavelet kernel optimization design algorithm based on JPEG2000 image compression. The algorithm is very effective for extending the wavelet kernel of JPEG2000 still image compression standard and optimizing JPEG2000 chip design. Background technique [0002] With the development of Internet technology and applications, people have higher and higher requirements for image compression methods, compression quality, compression ratio and real-time compression. The image compression standard JPEG2000 is selected as the core algorithm. The wavelet kernel used for wavelet coding in JPEG2000 standard is the key and difficult point of image compression system design. The JPEG2000 standard can realize functions such as high-quality image compression at low bit rates, compression of regions of in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24G06T9/00
Inventor 杨国安郑南宁郭树岗梅魁志
Owner XI AN JIAOTONG UNIV