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Coding and decoding method for images or videos

a technology of coding and decoding method, applied in the field of computer coding and decoding technology, can solve the problem of large data content size, and achieve the effect of reducing the size of data content in the code stream and ensuring the safety of the code stream

Active Publication Date: 2016-02-23
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]A new coding and decoding method for images or videos are provided by embodiments of the present invention to further improve coding or decoding efficiency.
[0018]By using the technical scheme of the present invention, only the index of a specific object in a visual dictionary and corresponding geometric relationship information are included in a code stream of an image, so that the size of data content in the code stream is greatly reduced. Moreover, the decoding process must refer to the visual dictionary, in this case, even the code stream is captured, the code stream still cannot be decoded without the corresponding visual dictionary, thus the safety of the code stream is guaranteed.

Problems solved by technology

However, even image features are used to code or decode images, the size of data content is still very large.

Method used

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  • Coding and decoding method for images or videos
  • Coding and decoding method for images or videos

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Embodiment Construction

[0023]The embodiments of the present invention are described more fully hereinafter with reference to the accompanying drawings, which form a part hereof, and which show, by way of illustration, specific exemplary embodiments by which the invention may be practiced. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be through and complete, and will fully convey the scope of the invention to those skilled in the art. Among other things, the present invention may be embodied as systems, methods or devices. The following detailed description should not to be taken in a limiting sense.

[0024]Throughout the specification and claims, the following terms take the meanings explicitly associated herein, unless the context clearly dictates otherwise. The phrase “in one embodiment” as used herein does not necessarily refer to the same emb...

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Abstract

A coding and decoding method for images or videos is provided by embodiments of the present invention to improve coding and decoding efficiency. The method includes: establishing a visual dictionary, wherein, the visual dictionary includes one or more visual words; extracting features from a specific object in an image; determining whether there is a visual word in the visual dictionary matching the specific object by using a feature matching method; obtaining the index of the visual word matched and a geometric relationship between the specific object and the visual word matched, wherein, the geometric relationship is represented by a project parameter; entropy coding the index of the visual word matched and the project parameter instead of entropy coding the specific object.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority from CN Patent Application Serial No.201310551681.6, filed on Nov. 7 2013, the entire contents of which are incorporated herein by reference for all purposes.FIELD OF THE INVENTION[0002]The present invention is related to computer coding and decoding technology, especially related to a coding and decoding method for images or videos.BACKGROUND OF THE INVENTION[0003]In the prior art, most of the coding or decoding method and coder or decoder thereof are based on analysis of the code of images and videos themselves, and further redundant image pixels are compressed to improve coding or decoding efficiency.[0004]With the development of local feature technology of images and videos, another coding or decoding method appears in the prior art. Instead of compressing image pixels, image features are extracted and compressed; and at a decoding side, images are then reconstructed with reference to the image features...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04N19/20G06T9/00H04N19/593H04N19/23H04N19/94
CPCH04N19/20G06T9/008H04N19/23H04N19/593H04N19/94
Inventor HUANG, TIEJUNGAO, WENMA, SIWEI
Owner PEKING UNIV
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