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A low-resolution image coding method based on intelligent quantization technology

A low-resolution image and encoding method technology, applied in the field of digital image compression, can solve problems such as uncontrollable pixel encoding quality

Active Publication Date: 2018-07-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Description
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  • Application Information

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Problems solved by technology

Compared with the traditional implementation method of "coding compression + low-resolution display" based on the JPEG image coding standard, the present invention can flexibly allocate coding resources according to the specific requirements of low-resolution display output, thereby improving the coding of output pixels. Quality, to overcome the shortcomings of traditional methods that cannot control the quality of pixel coding

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  • A low-resolution image coding method based on intelligent quantization technology
  • A low-resolution image coding method based on intelligent quantization technology
  • A low-resolution image coding method based on intelligent quantization technology

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Embodiment Construction

[0044] The present invention mainly adopts the mode of simulation experiment to verify the feasibility of the system model, and all steps have been verified by experiment. In order to realize the image compression based on the transform domain down-sampling technology, the specific implementation steps are as follows:

[0045] Step 1, image preprocessing

[0046] Set image width W=8 m , the image height H=8 n , where m and n are all natural numbers, divided into N=(W×H) / 8 according to the method of image segmentation in the traditional JPEG image compression standard 2 A non-overlapping square image block with a size of 8×8, denoted as B 1 , B 2 ,...,B i ,...,B N , here, W represents the width of the image, H represents the height of the image, N represents the total number of image blocks after the image is divided, i represents the index of the image block, i∈{1,2,...,N};

[0047] Step 2, image block coding parameter setting based on intelligent quantization technology...

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Abstract

The present invention provides a low-resolution image coding method based on intelligent quantization technology, which uses intelligent quantization technology to perform reasonable coding resource allocation, and utilizes intelligent quantization technology to perform differential coding and reconstruction of pixels in the image, which needs to be displayed High-quality compression encoding is performed on the output pixels, and low-quality compression encoding is performed on pixels that do not need to be displayed and output, so as to meet the requirements of efficient low-resolution image reconstruction after encoding. Compared with the traditional implementation method of "coding compression + low-resolution display" based on the JPEG image coding standard, the present invention can flexibly allocate coding resources according to the specific requirements of low-resolution display output, thereby improving the coding of output pixels. Quality, to overcome the shortcomings of traditional methods that are difficult to control the quality of pixel coding.

Description

technical field [0001] The invention belongs to the field of image coding, and mainly relates to digital image compression technology. Background technique [0002] With the development of multimedia technology, the encoding and compression of images is required not only to meet the changing transmission conditions, but also to adapt to different display environments, especially for the captured image signals, it needs to be able to adapt to mobile devices including smartphones and tablet computers. Demand for various playback terminals equipped with only low-resolution display screens. Therefore, how to take into account the high-efficiency low-resolution display requirements in the process of encoding and compressing image signals is a major challenge in the field of image encoding. [0003] The low-resolution display of images usually involves down-sampling the image signal in the spatial domain, reducing the displayed pixels to meet the requirements of low-resolution re...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/146H04N19/124H04N19/166
CPCH04N19/124H04N19/146H04N19/166
Inventor 朱树元曾辽原
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA