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Shadow correction method and device and imaging system

A shadow correction and imaging system technology, applied in the field of image processing, can solve problems such as difficulty in guaranteeing shadow correction effects and poor image quality, and achieve the effects of reducing computational complexity, simple methods, and improving system performance

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

[0006] The invention solves the problem that the shadow correction effect is difficult to guarantee and the image quality is poor under different scene light sources

Method used

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  • Shadow correction method and device and imaging system
  • Shadow correction method and device and imaging system
  • Shadow correction method and device and imaging system

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Embodiment Construction

[0042] In the prior art, based on an imaging system such as a camera, an image in which light is evenly incident on the lens is taken in advance for a specified light source, or the shadow calibration parameters are obtained in advance for an image taken under a mixed light source, and then the shadow calibration is used when performing image shadow correction The parameter corrects for image shading.

[0043] However, this method is difficult to adapt to the shading correction requirements of images acquired under different scene light sources, especially for the shading correction requirements of images with uneven color, because the occurrence of image uneven color is related to the wavelength of the light source, that is, It is related to the specific light source of the imaging scene of the imaging system, so it is difficult to obtain a good shadow correction effect when using the above-mentioned shadow correction parameters obtained based on the specified light source or ...

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Abstract

The invention relates to a lens shadow correction method and device and an imaging system. The method is used to correct shadow of images obtained by a lens. The method comprises that color temperature information of a light source corresponding to an image is obtained; a first shadow correction parameter corresponding to the light-source color temperature information is obtained; and the first shadow correction parameter is used to correct shadow of the image. The method can adapt to change of the light source of a scene of the image, so that the imaging system can obtain better shadow correction effect in different light source environments.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a shadow correction method and device, and an imaging system. Background technique [0002] Lens shading (Lens Shading) is the uneven brightness and color of the image caused by the optical characteristics of the lens. Lens shading correction is to correct and remove the shadows caused by optical factors such as the lens during the imaging process through a certain correction algorithm. [0003] The uneven brightness of the image caused by the optical characteristics of the lens is mainly due to the strong reflection and refraction at the edge of the lens when the incident light passes through the lens, which leads to the phenomenon that the center of the image is bright and the edge is dark; The color unevenness of the image caused by optical characteristics is mainly due to the different refractive indices of light of different wavelengths in the incident light, which causes the...

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Application Information

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IPC IPC(8): H04N5/217H04N9/73
Inventor 何珊朱钧孙德印
Owner SPREADTRUM COMM (SHANGHAI) CO LTD