Colorful image compressed bit stream color component real-time separation method and device

A color component, image compression technology, applied in image coding, image data processing, instruments, etc., can solve the problem of inability to achieve real-time separation, and achieve good scalability and portability.

Inactive Publication Date: 2009-05-06
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the existing JPEG2000 compressed code stream color component separation method cannot realize real-time separation, thereby providing a method that can realize the real-time separation of JPEG2000 compressed code stream color components

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  • Colorful image compressed bit stream color component real-time separation method and device
  • Colorful image compressed bit stream color component real-time separation method and device
  • Colorful image compressed bit stream color component real-time separation method and device

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] Before explaining the real-time color component separation method of the present invention, firstly, the JPEG2000 code stream of the color image in the JPEG2000 standard is analyzed. Such as figure 1 As shown, the JPEG2000 code stream of a color image consists of 5 parts: the main header, color component 0, color component 1, color component 2, and code stream end marker. The main header includes SOC, SIZ, COD, QCD and other marker segments; the three color components include Tile header and several encoded data packets; the code stream end mark indicates the end of the compressed code stream of a frame of images, fixed is 0xFFD9. The separated single-color code stream is composed of three parts: the main header, the color component, and the end mark of the code stream. figure 1 A comparison of the overall structure of the JPEG2000 co...

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Abstract

The invention discloses a coloring weight real-time separating method for coloring image compression bit stream, which comprises the following steps: detecting marks of a SOC marking segment and a SIZ marking segment for input bit stream, and starting to separate the coloring weight in the bit stream after detecting the marks; and performing different processing for different marking segments in the bit stream, and finishing the real-time separating operation of the coloring weight after receiving a bit stream ending mark. The invention further discloses a coloring weight real-time separating device, which comprises a shift register, a marking segment mark detecting and control module, a control bus, a SIZ marking segment processing module, a COD marking segment processing module, a QCD marking segment processing module, a COC marking segment processing module, a QCC marking segment processing module, a SOT marking segment processing module and a bit stream ending processing module. The invention achieves the JPEG2000 coloring weight separating function required by hardware, thus being advantageous for parallel execution of JPEG2000 decompression. The invention has good expandability and portability.

Description

technical field [0001] The invention relates to the field of image compression processing, in particular to a method for real-time separation of color components of a color image compression code stream and a corresponding device. Background technique [0002] With the development of multimedia technology and computer science, image compression and decompression functions have become an essential function of various multimedia devices. In many practical systems, such as digital cameras and medical image equipment, JPEG2000 is widely used as a compression algorithm. While JPGE2000 has the advantages of high compression ratio and multi-resolution support, it also has the characteristics of complex algorithm and large amount of calculation. Especially in some real-time applications, it is required that the decompression system can decompress the JPEG2000 color compressed code stream efficiently and quickly. For these real-time applications, the usual method is to use large-sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T9/00
Inventor 王贞松郭勐李玲
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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