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Image compression method based on vision redundancy measurement

An image compression and redundancy technology, which is applied in the field of image processing, can solve problems such as inaccurate estimation of visual threshold and influence on compression effect, and achieve the effect of accurately measuring visual redundancy

Inactive Publication Date: 2014-02-19
XIDIAN UNIV
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Problems solved by technology

The existing methods cannot calculate the structural uncertainty of the image well, resulting in inaccurate estimation of the visual threshold and affecting the compression effect

Method used

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  • Image compression method based on vision redundancy measurement
  • Image compression method based on vision redundancy measurement
  • Image compression method based on vision redundancy measurement

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Embodiment Construction

[0034] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0035] Step 1: Predict the image I to be compressed to obtain the predicted image I'.

[0036] (1a) Input the image I to be compressed with the size of N×N, according to each pixel v in the image I to be compressed i and its surrounding pixels v i+j The degree of correlation, calculate the pixel v i The predicted value of v i ':

[0037] v i ′ = Σ j = 1 21 × 21 c i + j v i + j + ϵ , i ∈ ( 1 ~ N ...

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Abstract

The invention discloses an image compression method based on vision redundancy measurement. The image compression method mainly solves the problem that an existing image compression method is low in image compression efficiency. The image compression method includes the steps: (1) forecasting an image to be compressed through an autoregression model to obtain a forecasted image, (2) obtaining a residual image according to the image to be compressed and the forecasted image, and calculating local binary pattern values of pixels in the residual image, (3) counting the occurring probability of the same local binary pattern values in the neighbor areas around the pixels, and calculating the uncertainty of the image to be compressed, (4) calculating visual threshold values corresponding to the pixels according to the uncertainty to conduct redundancy removal operation on the image to be compressed to obtain the pre-processed image, and (5) compressing the pre-processed image to obtain a compressed image. According to the image compression method, vision redundancy information in the image can be effectively removed through the visual threshold values, the compression efficiency is promoted, and the image compression method can be used for transmitting online video, mobile phone picture-phone images and satellite remote sensing images.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an image compression method based on visual redundancy measure, so as to improve the data processing capability, and can be used to guide the image data compression in aerospace fields such as Tiangong-1 and Chang'e-1. technical background [0002] With the improvement of digital image and digital video processing technology, digital image has become the main carrier of information, which is processed, transmitted, stored and reconstructed in more and more applications. However, due to the continuous improvement in the resolution of image acquisition equipment, the data volume of digital images is also growing rapidly. Massive data puts forward high requirements on storage capacity and transmission bandwidth. How to effectively compress images is an urgent problem to be solved. [0003] The purpose of image compression is to represent and transmit the origin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/132H04N19/50H04N19/85
Inventor 吴金建张亚中石光明
Owner XIDIAN UNIV
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