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Apparatus and method capable of correcting human skin pixels in picture

A technology for human skin and image correction, applied in the direction of brightness and chrominance signal processing circuits, etc., can solve the problems of affecting the accuracy of judgment, affecting the correction effect, and low judgment accuracy, so as to avoid storage, reduce misjudgment, and simplify hardware structure effect

Inactive Publication Date: 2007-01-31
CHIPNUTS TECH INC
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Problems solved by technology

The table lookup method must open up a storage area in advance to store the comparison table, and the quality of the comparison table directly affects the accuracy of judgment. If the comparison table has high precision, the judgment accuracy is high, but the storage space occupied is also bound to be large. ; If the accuracy of the comparison table is low, although storage resources can be saved, but the judgment accuracy is low, which will affect the final correction effect

Method used

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  • Apparatus and method capable of correcting human skin pixels in picture
  • Apparatus and method capable of correcting human skin pixels in picture
  • Apparatus and method capable of correcting human skin pixels in picture

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Embodiment Construction

[0016] The device and method for correcting human skin pixels in an image according to the present invention will be further described in detail below with reference to the accompanying drawings.

[0017] Such as figure 1 As shown, after sampling and analyzing the U and V chromaticity components of skin pixels in a large number of images, it is found that the chromaticity values ​​of human skin pixels generally conform to the chromaticity range of the irregular area indicated by the dotted line in the figure. On the basis of a large amount of statistical data, it can be considered that: when the chromaticity of a certain pixel falls into the U-V coordinate system figure 1 In the dotted line area shown, it is determined that the pixel represents human skin. The function of the dotted line area can be represented by a quadratic curve. In a preferred embodiment of the present invention, in order to simplify the hardware structure and save computing resources, a linear function i...

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Abstract

The invention relates to a device and method for calibrating the color of human skin, in which,the device consists of a judging unit, a controlling unit and a calibrating unit. The input-signals of image in the YUV domain are output from the judging unit and calibrating unit. The controlling unit is connected with the judging unit and calibrating unit, which controls the calibrating unit to calibrate the color of pixel of human skin according to the results determined by the judging unit.

Description

technical field [0001] The invention relates to a chroma processing device and method of an image signal, in particular to a skin color correction device and method for performing chroma processing on human skin pixels in an image. Background technique [0002] Because human beings are more interested in themselves than any other things, most of the objects selected when taking pictures and videos are human bodies, that is, in actual image applications, human body skin color is an important part of the image. However, because there are many light, electricity, heat and other interferences when taking pictures and videos, the skin color of the human body presented in the image is often unnatural, which greatly weakens the expressiveness of the image. In order to correct the chromaticity of the skin pixels in the image, it is first necessary to determine which pixels belong to the pixels of human skin. [0003] The method adopted in the prior art is to use a lookup table to d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/77
Inventor 黄寅罗巍
Owner CHIPNUTS TECH INC
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