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An image coding method and device

An image coding and image technology, applied in the field of image processing, can solve the problems of low coding efficiency, distinguish between regions of interest and background regions, etc., and achieve the effect of improving coding efficiency

Active Publication Date: 2016-12-07
VIMICRO ELECTRONICS CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In the prior art, common coding techniques are used to encode the image including the region of interest, that is, no distinction is made between the region of interest and the background region, and the set search window may include the background region, while the background region It is an area that users are not interested in, so in many cases, more useless work is done, and the efficiency of encoding will be very low

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Embodiment Construction

[0021] Embodiments of the present invention provide an image encoding method and device, which are used to improve the encoding efficiency of an image of a region of interest in an image.

[0022] In order to improve coding efficiency, an embodiment of the present invention proposes a motion estimation coding scheme for a region of interest.

[0023] In the prior art, the motion estimation process is a process of defining a search window in a reference frame, and searching for a block that best matches the current block to be encoded in this window. When defining a search window in a reference frame, the reference frame is considered as a whole, and the characteristics of different regions of the reference frame are not considered.

[0024] However, the embodiment of the present invention considers that the region of interest is an important concept in the field of video surveillance, distinguishes the places of interest or more important to the user in the image from the back...

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Abstract

The invention discloses an image coding method and device, which are used to improve the coding efficiency of the image of the region of interest in the image. An image coding method provided by the present invention includes: determining the search window corresponding to the current macroblock to be coded in the region of interest of the current frame image, wherein the search window is located on the coded image at the same position as the current macroblock to be coded In the region of interest with the same location of the region of interest; the current macroblock to be coded is coded according to the encoded image in the search window corresponding to the current macroblock to be coded.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image coding method and device. Background technique [0002] For image coding, the coding process can be roughly divided into two types: intra-frame coding and inter-frame coding. [0003] Before encoding the image, a frame of image is first divided into several macroblocks, and the macroblock is the coding unit, and the macroblocks are encoded one by one according to the raster scanning order until the encoding of the macroblocks of the entire image is completed. [0004] The so-called intra-frame coding means that when coding a frame of image, any macroblock in the frame can only be coded by using the coded macroblock in the image as a reference. [0005] The so-called inter-frame encoding means that when encoding the macroblock in the current frame image, it is necessary to refer to the content in the encoded image before the current frame image, and thes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/167H04N19/176H04N19/56
Inventor 季鹏飞
Owner VIMICRO ELECTRONICS CORP