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Compression method for screen image set

A screen image and compression method technology, applied in the field of image processing, can solve problems such as coupling damage and achieve high compression efficiency

Inactive Publication Date: 2015-07-15
BEIJING UNIV OF TECH
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However, this approach requires a change in the way predictions are e

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  • Compression method for screen image set
  • Compression method for screen image set

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Embodiment Construction

[0020] The compression method of this screen image collection includes the following steps:

[0021] (1) Calculate the hash value of each image block of each image;

[0022] (2) Measure the correlation between the image and the image by extracting the hash feature of the image block;

[0023] (3) Generate a minimum spanning tree based on the directed graph for all images to determine the prediction structure of the image set;

[0024] (4) Reorder the image set and determine the 4 optimal prediction reference images for each image;

[0025] (5) Use the 4 optimal prediction reference images of step (4) to replace the default 4 reference frames in the HEVC standard to predict the current image.

[0026] The present invention calculates the hash value of each image block, measures the correlation between the image and the image by extracting the hash feature of the image block, and then generates an improved minimum spanning tree based on the directed graph for all images. In this way, the ...

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Abstract

The invention discloses a compression method for a screen image set, and aims to obtain higher compression efficiency. The method comprises the following steps: (1) computing the Hash value of each image block of each image; (2) balancing the correlation between images by extracting the Hash characteristics of the image blocks; (3) generating a minimum spanning tree based on a directed graph for all the images in order to determine a prediction structure of the image set; (4) re-sequencing the image set to determine four optimal prediction reference images of each image; and (5) replacing four default reference frames in an HEVC (High Efficiency Video Coding) standard with the four optimal prediction reference images in the step (4) to predict a current image.

Description

Technical field [0001] The present invention belongs to the technical field of image processing, and specifically relates to a method for compressing a screen image collection. Background technique [0002] Screen images come from the screen desktops of various electronic devices. Unlike natural images, screen images are usually arranged in a random combination of text, graphics and natural images, so we also call them mixed images . Screen image content plays a pivotal role in many new media such as wireless display, remote desktop and cloud computing. Under today's high-resolution display requirements, the amount of data on the screen content is huge, which cannot be satisfied by the network bandwidth of today's society. For example: a screen content video with a resolution of 1080p and a frame rate of 30 Hz, the amount of data that needs to be transmitted per second is 149,9292,000 bits. It can be seen that the amount of data is huge, therefore, the compression of the scree...

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Application Information

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IPC IPC(8): H04N19/50H04N19/157H04N19/196H04N19/96
Inventor 施云惠李达丁文鹏尹宝才
Owner BEIJING UNIV OF TECH
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