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Method for implementing built-in image compression based on run-length coding

A technology of run-length coding and image compression, which is applied in the field of run-length coding technology, can solve problems such as inability to form embedded code streams, achieve good compression performance, reduce time, and improve performance

Inactive Publication Date: 2008-02-27
ZTE CORP
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Problems solved by technology

The SR image compression method uses a method similar to run-length coding to record the number of non-important coefficients that appear continuously, and uniformly quantizes important coefficients. It also has comparable performance to EZW, but the disadvantage is that it cannot form an embedded code stream.

Method used

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  • Method for implementing built-in image compression based on run-length coding
  • Method for implementing built-in image compression based on run-length coding

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] As shown in Figure 1, the wavelet image compression method proposed by the present invention is generally composed of four parts: linear transformation, quantization, sorting coding and entropy coding. The linear transformation part adopts 9 / 7 biorthogonal wavelet transformation. The quantization part adopts fast successive approximation quantization. The sorting encoding part adopts the run length encoding which describes the run length in binary. The entropy coding part adopts adaptive arithmetic coding.

[0036] The encoding process of the inventive method for image compression is as shown in Figure 3, and the specific steps are shown in the following detailed description:

[0037] 1) Original image input;

[0038] 2) Carry out wavelet transform to the original image;

[0039] Specifically, the wavelet transform can ado...

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Abstract

This invention discloses a method for realizing inserted image compression based on travel coding including: inputting images, carrying out wavelet transformation, approaching to quantization quickly step by step and travel coding based on a binary system description and entropy coding and outputting compressed images, in which, the image coefficient after wavelet transformation is quickly quantized by setting up sub-band peak value to reduce the time necessary for approaching to quantization and increase the performance of the compression method and reduce the complexity of the method compared with many wavelet image compression methods with a zero-tree structure as the character.

Description

technical field [0001] The invention relates to an embedded wavelet image compression method for still images, in particular to a run length coding technique based on fast successive approximation quantization and binary description run length. Background technique [0002] With the advent of the information age, the amount of digital image data is quite large, and the mass storage, processing and transmission of image information has become one of the biggest problems in its hardware and software technology. Taking digital TV as an example, if it is a digital TV image in SIF (Source InputFormat) format, NTSC system, color, 4:4:4 sampling, then the amount of data per frame is 2028Kb, and the data flow per second can reach 60.8MB. A 650MB CD-ROM can only store 325 frames of images in total, and the playable program time is only 10.7 seconds. From this simple example, we can see how huge the amount of image information after digitization is. It is obviously unrealistic to si...

Claims

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Application Information

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IPC IPC(8): H04N7/26G06T9/00H04N19/124H04N19/129H04N19/63H04N19/91H04N19/93
Inventor 刘利章薛宝林王云峰
Owner ZTE CORP
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