Light source detection method and device

A detection method and technology of a detection device are applied in the field of image processing, which can solve the problem of inability to accurately obtain the color temperature information of light source, and achieve the effect of improving the quality of image processing and ensuring the integrity.

Active Publication Date: 2015-11-25
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology

[0007] The technical solution of the present invention solves the problem that the color temperature information of the light source cannot be accurately obtained

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  • Light source detection method and device
  • Light source detection method and device

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Embodiment Construction

[0057] Since the color temperature of the light source plays an important role in the image quality, only by correctly obtaining the color temperature of the light source in the imaging environment can the integrity of the image color be guaranteed and a better image processing effect be achieved. The color temperature of the light source is not accurate.

[0058] In order to solve the above problems, the technical solution of the present invention provides a light source detection method for accurately obtaining the color temperature of the light source, figure 1 is a schematic flow chart of the light source detection method shown.

[0059] Such as figure 1 As shown, step S1 is executed to determine the pixels of the detection image located in the second region of the chromaticity space.

[0060] In order to realize the detection of the color temperature of the light source, it is necessary to determine a reference area in the chromaticity space, that is, the so-called whit...

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Abstract

Provided is a light source detection method and device. The method comprises that pixel points, which are positioned in a second area of a chroma space, of a detection image are determined, the second area corresponds to a first area of a standard graph card, and the first area is any one selected from a white area, a muted color area and a colorless area in the standard graph card; light-source color temperatures corresponding to different pixel points are determined on the basis of correspondence between pixel values of the pixel points and the light-source color temperatures as well as the pixel values of the pixel points in the second area; based on the light-source color temperatures corresponding to the pixel points in the second area, the pixel points are divided into pixel point sets corresponding to the light-source color temperatures; and the light-source color temperature of the detection image is determined according to the light-source color temperatures corresponding to the pixel point sets. The method can be used to accurately obtain the light-source color temperature, processing including automatic white balance can be implemented on the image according to the obtained light-source color imaged of the detection image, the color completeness of the image is effectively ensured, and the image processing quality is improved.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a light source detection method and device. Background technique [0002] The color temperature of the light source is a basic parameter to describe the characteristics of the light source or illuminant, and it is of great significance in the measurement of color. [0003] If the image captured by the imaging sensor in the imaging system is not processed by white balance, different color casts will appear under different light source color temperatures. The phenomenon of bluish cast, when the color temperature of the light source is low, the image taken will appear reddish. [0004] In order to improve image quality, imaging devices such as digital cameras usually contain an automatic white balance processing unit to ensure image quality. The white balance processing unit in the imaging system is to correct the color deviation caused by the color temperature of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232
Inventor 何珊孙德印朱钧
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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