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Data compression method and device for composite images

A composite image and data compression technology, which is applied in the field of image processing, can solve the problems of high compression efficiency, low distortion, and unsatisfactory extremes, and achieve the effect of reducing image distortion and improving compression efficiency

Inactive Publication Date: 2014-08-20
BEIJING ZHONGHE ZHUOYUAN TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Embodiments of the present invention provide a data compression method and device for composite images, aiming to solve the problem that existing compression methods cannot meet the requirements of extremely high compression efficiency and extremely low distortion when the channel capacity of data transmission is very small

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  • Data compression method and device for composite images

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Embodiment 1

[0021] figure 1 The implementation flow of the data compression method for composite images provided by Embodiment 1 of the present invention is shown, and the details are as follows:

[0022] It should be noted that the present invention is especially suitable for data processing where the sender is a composite image and the capacity of the data transmission channel between the image source and the receiver is very small, such as the scene of image transmission from an on-board intelligent terminal to a monitoring terminal.

[0023] In step S101, the edge blur of the composite image is restored, the composite image includes symbols, lines and static background.

[0024] In this embodiment, the composite image refers to a composite image composed of symbols, lines and a static background. In 3D drawing, each graphic is composed of pixels, and each momentary picture is composed of frames. Because the pixels on the screen are limited, if you want to show the position of the pol...

Embodiment 2

[0035] figure 2 A specific structural block diagram of the data compression apparatus for composite images provided by Embodiment 2 of the present invention is shown. For convenience of description, only parts related to the embodiment of the present invention are shown. In this embodiment, the data compression device for composite images includes: a blur recovery unit 21 , an image difference unit 22 , a data acquisition unit 23 and a data stream generation unit 24 .

[0036] Wherein, the blur restoration unit 21 is used to restore the edge blur of the composite image, the composite image includes symbols, lines and static background;

[0037] An image difference unit 22, configured to acquire several difference images corresponding to the composite images adjacent in time one by one, and the difference images include symbols and lines;

[0038] A data acquisition unit 23, configured to process the plurality of differential images by using run-length coding, and acquire pix...

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Abstract

The invention belongs to the technical field of image processing, and provides a data compression method and device for composite images. The method includes the steps that edge blur of the composite images is recovered, and each composite image comprises symbols, lines and a static background; a plurality of difference images corresponding to the composite images adjacent in time are obtained one by one, and each difference image comprises symbols and lines; the difference images are processed through run coding to obtain pixel data and length data; the pixel data and the length data are encoded by adopting dictionary coding and entropy coding respectively to obtain coded data streams. Under the condition of small channel capacity for data transmission, the compression efficiency of the images is improved, and image distortion is reduced.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a data compression method and device for synthesizing images. Background technique [0002] Existing image sequences and video compression algorithms are universal, such as MJPEG, H.264, etc., this feature makes it impossible to make full use of the characteristics of the data, and the existing compression methods cannot maintain low distortion while maintaining high compression efficiency, or in Low distortion while maintaining high compression efficiency. For the synthetic image displayed on the screen on the aircraft, it is mainly composed of various symbols and lines, and the background is static, while ground monitoring requires the ability to clearly identify the content of the image, but the channel capacity of the data transmission between the two is very small 1. Existing compression methods cannot meet the requirements of extremely high compression...

Claims

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Application Information

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IPC IPC(8): H04N19/46H04N19/85H04N19/86H04N19/139H04N19/90
Inventor 吕春史伟仁
Owner BEIJING ZHONGHE ZHUOYUAN TECH
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