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Stationary image compression coding method based on asymmetric inversed placement model

A still image, compression coding technology, applied in the field of NAMC representation, still image compression coding based on asymmetric inverse layout model, can solve the problem that it is not suitable for image lossy representation

Inactive Publication Date: 2009-02-11
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, the color image representation method based on rectangular NAM proposed in this paper is a lossless representation method of images, which is not suitable for lossy representation of images.

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  • Stationary image compression coding method based on asymmetric inversed placement model
  • Stationary image compression coding method based on asymmetric inversed placement model
  • Stationary image compression coding method based on asymmetric inversed placement model

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[0099] attached Figure 4 is a schematic diagram of the STC method (ε=10), ε is the error tolerance; Figure 4 (a) is from an F16 grayscale image with a size of 512×512, Figure 4 (b) is from Figure 4 Sub-image matrix of size 16×16 extracted in (a). Figure 4 (c) is 51 similar blocks obtained according to the Gouraud shadow method and the binary tree decomposition rule when ε=10. Figure 4 (d) is based on Figure 4 The reconstructed image of the linear tree table and color table in (c), it is easy to know that the PSNR of the reconstructed image is 41.7117. according to Figure 4 (c) The corresponding binary tree representation structure can calculate the length of the linear tree table as 101, so Figure 4 (b) The BPP expressed by the STC method is (101+51×4×8) / (16×16)=6.7695.

[0100] Figure 5 is a schematic diagram (ε=10) of the NAMC method of the present invention, by using the NAMC representation algorithm described in the present invention, can put Figure 4 (...

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Abstract

By the idea of the location problem, the invention discloses a still image coding compression method based on a non-symmetric adverse-layout model, which is called an NAMC representation method for short. A coding technology mainly divides a gray-scale image into nonoverlapping same-class blocks by utilizing an expanding Gouraud shadowing method and a rectangular non-symmetric adverse-layout model method; then all the same-class blocks are coded. A decoding technology mainly reconstructs a decoding image by utilizing the expanding Gouraud shadowing method according to a coordinates table and a color table of NAMC coding result. On the premise of ensuring the image quality, the NAMC representation method has lower bit rate and less number of the blocks, thus has higher processing speed, and is an image coding compression method superior to the commercialized JPEG method at present. The still image coding compression method can not only be used in the traditional JPEG market such as scanners, printers, digital cameras, etc., but can also be used in the emerging field such as network transmission, wireless communication, medical images, etc.

Description

technical field [0001] The technical field of the present invention is computer image processing, and relates to image representation and image compression coding methods, specifically a still image compression coding method based on an asymmetric inverse layout model, referred to as NAMC representation method. Background technique [0002] Image representation is an important problem in the fields of computer graphics, computer vision, robotics, image processing, and pattern recognition. An effective image representation method can not only save storage space, but also improve the speed of image processing. With the advent of the digital information age and the development of multimedia computer technology, the amount of various image data that people face has increased dramatically. Due to the large amount of image information, the requirements for fast and real-time transmission cannot be met. A difficult problem restricting the development of the Internet. Therefore, t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T9/00H04N1/41
Inventor 陈传波郑运平方少红刘小峰
Owner HUAZHONG UNIV OF SCI & TECH
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