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Multi-channel LSC gain adjustment method and device, storage medium and image processing equipment

An adjustment method and multi-channel technology, applied in the field of image processing, can solve problems such as chromatic aberration, achieve the effect of improving image quality and reducing calculation parameters

Active Publication Date: 2021-01-19
GALAXYCORE SHANGHAI
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Problems solved by technology

[0005] There is an urgent need for a multi-channel LSC gain adjustment method, while adjusting the gain of each channel, to avoid the problem of color difference caused by inconsistent changes in LSC gain of each channel due to changes in ambient brightness or color temperature

Method used

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  • Multi-channel LSC gain adjustment method and device, storage medium and image processing equipment
  • Multi-channel LSC gain adjustment method and device, storage medium and image processing equipment

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Embodiment Construction

[0033]As mentioned above, in the prior art, the LSC method can be used to compensate for the attenuation caused by the optical path system to different photosensitive areas. For example, when the ambient brightness or color temperature changes, the LSC gain of each channel is adjusted, and then according to the image The product of the channel value of each channel of and the adjusted LSC gain determines the channel value of each channel of the output image, such as R value, G value, and B value.

[0034] The inventors of the present invention have found through research that in the prior art, it is often necessary to store multiple sets of LSCs in consideration of changes in ambient brightness and color temperature. gain parameters, the calculation is complex. In dynamically adjusting the LSC gain Failed to improve the chromatic aberration problem in the process.

[0035] In the embodiment of the present invention, the LSC gain of each channel before the gain adjustment and...

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Abstract

The invention discloses a multi-channel LSC gain adjustment method and device, a storage medium and image processing equipment. The method comprises the steps: determining the LSC gain of each channelbefore gain adjustment and the LSC gain of a first channel after gain adjustment; according to the LSC gain of each channel before gain adjustment and the LSC gain of the first channel after gain adjustment, determining the LSC gain of other channels except the first channel after gain adjustment, wherein the channel value of each channel after gain adjustment, the product of the LSC gain and thewhite balance gain are equal. According to the method disclosed in the invention, the LSC gains of other channels can be determined under the condition that the LSC gains of the first channel beforeand after adjustment are known, and therefore the color difference problem caused by inconsistent LSC gain change of each channel due to environment brightness or color temperature change is effectively prevented.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a multi-channel LSC gain adjustment method and device, storage medium, and image processing equipment. Background technique [0002] As camera modules tend to be miniaturized, the diameter of the lens decreases and the Chief Ray Angle (CRA) of the lens increases. Therefore, compared with the brightness of the center of the image, the brightness of the edge of the image is reduced, which is called lens shading (Lens Shading). Lens shading deepens with increasing sensor resolution, and also as the size of the incident area decreases in order to increase depth of field. [0003] In the prior art, a lens shading compensation (Lens Shading Compensation, LSC) method can be used to compensate for the attenuation caused by the optical system to different photosensitive areas, wherein the optical system can include, for example, a lens, a filter (Color Filter), Micro-lens (Micro-lens), e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/64H04N9/73
CPCH04N9/646H04N23/88
Inventor 吉倩倩陈孟儒徐磊
Owner GALAXYCORE SHANGHAI
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