Method for providing format of storing images in high compress performance

A technology of image storage and high compression, applied in image coding, image data processing, instruments, etc., can solve unsatisfactory problems

Inactive Publication Date: 2004-10-27
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

[0003] Just because the image storage format with high compression performance is so important in terms of economy and military, and the image format with the best co

Method used

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  • Method for providing format of storing images in high compress performance
  • Method for providing format of storing images in high compress performance
  • Method for providing format of storing images in high compress performance

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Embodiment Construction

[0015] The specific steps are:

[0016] 1. Use the method of chain coding to record the image. There are three kinds of vertices on the square lattice of the image, represented by 1, 2, and 3 respectively, and record the corresponding vertices along one direction, which is the unit image of the vertex chain coding. The record of , records the image by recording the boundary of the graph. In a square dot matrix image, along the border, graphics can be recorded by marking the border pixel vertices;

[0017] 2. Use the automatic search method of the binary image to automatically search the boundary of the image. For the eight-nearest neighbor image, we define the following boundary calibration automaton: the state set of the automaton is as follows figure 2 shown. Among them, the pixel with × sign is the current position of the automaton, the pixel with the arrow is the position of the automaton at the previous moment, the arrow indicates the direction of the automaton walking...

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Abstract

Based on automaton of demarcating borderline and vertex chain encoding method, image recording, image unit searching, ternary notation coding and image restoration are encoded through vertex chain. Implementing step are: selecting three vertexes 1, 2, 3 on square dot matrix of image, recording corresponding vertexes along a direction so as to obtain record of image unit in method of vertex chain encoding; generating vertex chain coding of image unit by using automaton of demarcating borderline automatically; registering coordinate of starting point of chain coding in ternary notation. Outstanding strongpoint is high compress performance of exceeding all image storage formats in current.

Description

technical field [0001] The invention relates to a method for obtaining an image storage format with high compression performance, belonging to the technical field of computer image processing. Background technique [0002] The size of the image file is large, which is a big trouble in the transmission of the image file. For example, on the network, if the image file is large, the transmission time will be long, which makes the information transmitted on the network very crowded. A main performance index of an image file is to express the image with as few bytes as possible, that is, the size of the image file should be small. Specifically, figure 1 In the picture shown, the BMP format is 442k, the IFF format is 113k, and the GIF format is 7.72k. Therefore, to transmit the same picture on the network, assuming that the BMP format takes 1 second, it only takes 0.256 seconds and 0.017 seconds to use the IFF format and GIF format respectively. Due to the large amount of tran...

Claims

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Application Information

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IPC IPC(8): G06T9/00
Inventor 顾国庆
Owner UNIV OF SHANGHAI FOR SCI & TECH
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