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Colour-picture damage-free compression method based on perceptron

A lossless compression, color image technology, applied in the field of image processing, can solve the problems of slow execution speed, low compression efficiency, high algorithm complexity, and achieve the effect of fast encoding speed, high compression ratio, and high encoding efficiency

Inactive Publication Date: 2003-03-26
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

This method overcomes the disadvantages of slow execution speed, high algorithm complexity and low compression efficiency in previous image lossless compression algorithms.

Method used

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  • Colour-picture damage-free compression method based on perceptron
  • Colour-picture damage-free compression method based on perceptron
  • Colour-picture damage-free compression method based on perceptron

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Embodiment Construction

[0047] image 3 Both digital video cameras and USB interfaces are commercially available. They mainly complete the collection of various images that need to be compressed, and convert the optical signal of the image to be processed into a digital signal. The image is input to the computer, which is convenient for computer processing, transmission and other operations. Computer processing mainly reads in the collected images through the existing USB interface software, and the processed image files are output to the buffer memory of the computer, which is convenient for local storage (stored in the hard disk); data transmission and storage are carried out through network storage devices , processing; or directly decode, where the flow chart of decoding is shown in Figure 8 , and then display. The lossless compression coding of images is realized by software. The whole process of image compression is described in detail below in conjunction with specific examples, see Figur...

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Abstract

The invention relates to the image processing area including following steps. (1) With being read from the USB port by the computer, the target images to be processed are stored in the memory. (2) The images to be compressed are carried out the lossless color sphace transformation. (3) The current pixels are predicted by using the two dimensions weighted predication model. The predicted residual is calculated. (4) Whether the mapped predicted residual is less than the preset error limit or not is determined. The self-adopting adjustment is needed if the residual exceeds the threshold. (5) The RICE entroy coding is accepted. (6) The compressed result of the image is output and saved. The invented method possesses the advantages of lower complexity, higher compression ratio and high executing speed.

Description

technical field [0001] The invention relates to the field of image processing, and designs and implements a color image lossless compression method based on a neural network perceptron. Background technique [0002] With the wide application of multimedia technology in recent years, image lossless compression technology plays an important and irreplaceable role in some important image information storage and transmission applications, which can greatly reduce the impact on storage media capacity and transmission bandwidth requirements. Especially in the application system that is repeatedly stored, in order to maintain the original quality of the image, it is generally required to use lossless compression technology. [0003] Since there is redundant information among image pixels, the purpose of image compression can be achieved by utilizing the correlation between image data and re-encoding to remove redundant information in image data. As for the color image, it can be ...

Claims

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Application Information

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IPC IPC(8): G06N3/06G06T9/00
Inventor 贾克斌沈兰荪庄新月张鸿源徐遄
Owner BEIJING UNIV OF TECH
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