Image code compression and decoding methods and devices

An image coding and image compression technology, applied in the field of image processing, can solve the problems of low coding and compression efficiency, achieve the effect of improving text compression performance and compression ratio

Active Publication Date: 2018-06-29
XIAN WANXIANG ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The embodiment of the present invention provides a method and device for image codec compression to at least solve the technical problem of low coding and compression efficiency due to the consideration of the text compression scheme based on the correlation of the whole block

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  • Image code compression and decoding methods and devices
  • Image code compression and decoding methods and devices
  • Image code compression and decoding methods and devices

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Experimental program
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Embodiment 1

[0031] According to an embodiment of the present invention, an embodiment of an image coding and compression method is provided. It should be noted that the steps shown in the flow charts of the drawings can be executed in a computer system such as a set of computer-executable instructions, and, Although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0032] figure 1 is a schematic flow chart of an image encoding and compression method according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0033] Step S102, identifying the image to be compressed to obtain the text image part;

[0034] Step S104, performing a preset transformation on the first type of component in the text image part to obtain a low frequency component and a high frequency component corresponding to the first type of component;...

Embodiment 2

[0055] According to an embodiment of the present invention, an embodiment of an image decoding method is provided. It should be noted that the steps shown in the flow charts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and, although A logical order is shown in the flowcharts, but in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0056] image 3 is a schematic flowchart of an image decoding method according to an embodiment of the present invention, such as image 3 As shown, the method includes the following steps:

[0057] Step S302, classify the acquired image code stream according to the preset classification, and obtain the code stream of the text image part and the code stream of the picture image part;

[0058] Step S304, matching the corresponding decoding algorithm to the low-frequency component and high-frequency component in...

Embodiment 3

[0075] According to an embodiment of the present invention, an embodiment of an image coding and compression device is provided, Figure 5 is a schematic structural diagram of an image coding and compression device according to an embodiment of the present invention, such as Figure 5 As shown, the device includes:

[0076] The identification module 52 is used to identify the image to be compressed to obtain the text image part; the image processing module 54 is used to perform preset transformation on the first type component in the text image part to obtain the low frequency component and the high frequency component corresponding to the first type component. Frequency component; compression module 56, is used for encoding the low-frequency component and the second type component in the text part image by the first preset encoding algorithm, and encodes the high-frequency component by the second preset encoding algorithm to obtain image compression stream.

[0077]In the e...

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Abstract

The invention discloses image code compression and decoding methods and devices. The image code compression method comprises the steps of: identifying an image to be compressed to obtain a text imageportion; performing a preset transformation on a first type of components in the text image portion to obtain low frequency components and high frequency components corresponding to the first type ofcomponents; and coding the low frequency components and a second type of components in the text image portion through a first preset coding algorithm, and coding the high frequency components througha second preset coding algorithm to obtain an image compression code stream. The methods and the devices solve the technical problem of low code compression efficiency due to the consideration of whole block-based correlation of the text compression scheme.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image codec compression method and device. Background technique [0002] With the rapid advancement of Internet technology, image-based real-time communication methods are becoming more and more ubiquitous, and achieving a higher ratio of image compression can significantly reduce the transmission delay of images in the network, improve image transmission quality and improve user experience . [0003] However, an image basically contains content such as text, pictures, graphics and / or natural video, so the encoding and compression method based on image content is currently a relatively new image compression encoding processing scheme; but the text content in the image is generally colored It is relatively single, and the texture details are gathered, so the text encoder and arithmetic encoder based on block-based basic color recognition can more effectively i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/85H04N19/91H04N19/60H04N19/186
CPCH04N19/186H04N19/60H04N19/85H04N19/91
Inventor 苏睿吴传会
Owner XIAN WANXIANG ELECTRONICS TECH CO LTD
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