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A Method of Entropy Encoding Curves

A technology of entropy coding and coding method, which is applied in the field of entropy coding of curves, which can solve the problem of large amount of data and achieve the effect of small amount of encoded data.

Active Publication Date: 2016-10-12
ZHEJIANG UNIVIEW TECH CO LTD
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Problems solved by technology

Although this scheme eliminates non-curve background information, it uses coordinate representation, especially for large resolution images such as HD (High Definition, high definition) or UHD (Ultra High Definition, ultra high definition), the amount of data is still large

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  • A Method of Entropy Encoding Curves

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Embodiment Construction

[0030] In order to solve the problem of a large amount of information in curve coding mentioned in the background art, the present invention provides a method for curve entropy coding. As we all know, entropy coding is a technique for lossless data compression. In this technology, each letter, number, or symbol in a piece of text is replaced by a bit (Bit) of different lengths. All letters, numbers, or symbols need to be distinguishable from each other after compression, and the number of bits expressed should be the smallest. The technique of the present invention will explain in detail how to use the idea of ​​entropy coding to entropy code the curve, so as to achieve the purpose of representing the curve completely with a small amount of data. Describe in detail below through specific embodiment.

[0031] Several pixel points are connected sequentially to form a curve. In order to represent this curve, the following method is considered to be an ideal method: describe th...

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Abstract

The invention provides a method for carrying out entropy coding on a curve. The method for carrying out the entropy coding on the curve comprises the steps that coding is carried out on the position of an initial pixel point of the curve; coding is carried out on the direction of the initial pixel point of the curve, and absolute coding is carried out by using three bits in the coding of the direction of the initial pixel point; coding is carried out on the directions of other pixel points except the initial pixel point, wherein the coding carried out on the directions of other pixel points except the initial pixel point specifically comprises the steps that coding is carried on the direction of the nth pixel point of the curve, relative coding is carried out on the coding of the direction of the nth pixel point by using the direction of the (n-1)th pixel point, and the n is a natural number larger than or equal to two. According to the method for carrying out the entropy coding on the curve, one curve is clearly expressed, and meanwhile the purpose of minimum coding data amount is achieved.

Description

technical field [0001] The invention relates to the technical field of image coding, in particular to a method for entropy coding curves. Background technique [0002] In the field of video surveillance and image intelligent analysis, it is necessary to extract objects from images, or extract moving foreground from moving videos, or extract different color regions in images, etc. Many edges or contour curves will be formed during the above extraction operation. These curves need to be saved and transmitted as features. Therefore, it is necessary to design a method to represent the curve and reduce the redundant information as much as possible. [0003] In the prior art, the coordinates of each point of the curve are usually used to represent the curve. Although this solution eliminates non-curve background information, it uses coordinate representation, especially for large-resolution images such as HD (High Definition, high definition) or UHD (Ultra High Definition, ultr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T9/00
Inventor 吴参毅
Owner ZHEJIANG UNIVIEW TECH CO LTD
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