Method for detecting area of skin color of human body in image compression domain

A skin-color area and image compression technology, which is applied in the field of human skin-color area detection, can solve problems such as complicated operation steps, low detection accuracy of skin-color area, and large amount of calculation, and achieve the effects of simplifying operation steps, increasing speed, and improving accuracy

Inactive Publication Date: 2008-03-26
广州创艺信息科技有限公司
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Problems solved by technology

[0011] The purpose of the present invention is to provide a human body skin color area detection method on the JPEG image compression domain, which overcomes the defects of complex operation steps and large amount of calculation in the existing detection method, and realizes the rapid detection of human body skin color area
[0012] Another object of the present invention is to provide a method for detecting human skin color areas in the JPEG image compression domain, which overcomes the defect of low detection accuracy of skin color areas in existing detection methods, and realizes accurate detection of human body skin color areas

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  • Method for detecting area of skin color of human body in image compression domain
  • Method for detecting area of skin color of human body in image compression domain
  • Method for detecting area of skin color of human body in image compression domain

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[0027] The method of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] As shown in Figure 1, the human skin color area detection method on the JPEG image compression domain of the present invention mainly comprises the following steps:

[0029] In step 100, system parameters are initialized. These parameters include: texture feature threshold, skin color probability threshold, image block size, human skin color distribution model. The texture feature threshold and color feature threshold are fixed values ​​obtained by experiments. The image block size refers to the size of the basic image block when detecting the human skin color area, the image block size should be an integral power of 2, and must be one of the following three: 8×8, 4×4, 2×2; Human skin color distribution model depicts the possibility of various colors belonging to human skin color. Various existing or future human skin co...

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Abstract

The invention discloses a method for detecting human skin color region in JPEG image compression domain, comprising the steps of: initializing system parameters; performing Huffman decoding and inverse quantization on a to-be-detected JPEG image to obtain DCT coefficients corresponding to all image blocks on Y, Cb and Cr components; calculating color and texture characteristics of each image block; calculating skin color probability of each image block; according to the skin probabilities and texture characteristics, judging if each image block is a human skin color region. The advantages of the invention: it need not completely decompress an image but directly operates on a compressed code flow, speeding up the human skin color detection and improving detecting accuracy.

Description

technical field [0001] The invention relates to a method for detecting a human skin color area in an image, in particular to a detection method for a human body skin color area in a JPEG image compression domain. Background technique [0002] An important type of information in images is human information, and human skin is an important physiological feature of human beings. Fast and accurate detection of human skin color regions in images has important theoretical and practical value in applications such as face detection and sensitive image filtering. [0003] JPEG (Joint Photographic Experts Group) is an international still image compression standard formulated by the still image compression standard formulation committee under the International Organization for Standardization (ISO). Due to the excellent quality of JPEG for image static compression, it has achieved great success. Eighty percent of the images on the website currently use the JPEG compression standard. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T9/00G06T7/00
Inventor 郑清芳高文王耀威黄庆明
Owner 广州创艺信息科技有限公司
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