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Image correction method and apparatus for multi-channel CCD camera

An image correction and camera technology, applied in image communication, TV, color TV components and other directions, can solve problems such as brightness and chromaticity deviation, and achieve the effect of improving uniformity, ensuring fidelity, and improving output image quality

Active Publication Date: 2016-06-22
ZHEJIANG UNIVIEW TECH CO LTD
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Problems solved by technology

[0003] In the multi-channel CCD mosaic image, due to the corresponding difference of the pixels caused by the CCD area array process, the gain, dark current, wiring and other factors between each channel, the brightness and chromaticity of different areas of the image after the multi-channel mosaic are completed There is a slight deviation in the above, and there is obvious non-uniformity

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Embodiment Construction

[0057] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0058] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0059] It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, the information should not be limited to these terms. These terms are on...

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Abstract

The invention provides an image correction method and apparatus for a multi-channel CCD camera. The method comprises: an ideal weighted pulse width value of a preset gain section is determined at a system debugging stage; according to the ideal weighted pulse width value and a preset sampling point number, sampling point data of all channels are obtained; according to a preset rule, segmentation is carried out on an expected brightness sampling interval of a preset color brightness component in the preset gain section to obtain a plurality of brightness segments; on the basis of sampling point data falling into a numerical value interval of each brightness segment, linear fitting parameters corresponding to the preset color brightness component at all brightness segments are determined; and a CCD sampling channel is selected as a reference channel for correcting image color brightness and correction parameters of other CCD sampling channels relative to the reference channel are determined based on the linear fitting parameters. According to the image collection method provided by the application, an obtained spliced image has high uniformity; and the quality of the image outputted by the multi-channel CCD image collection system can be improved.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a multi-channel CCD camera image correction method and device. Background technique [0002] At present, high-definition network cameras have been widely used in security monitoring, safe city, intelligent transportation and other fields. High-definition network cameras mainly use CCD (Charge Coupled Device, Charge Coupled Device) image sensors with excellent photosensitivity and low noise as image acquisition sensors. Due to the limitations of the CCD process, in order to obtain high-resolution images with a large area array and a high frame rate, it is necessary to use a multi-channel camera for image stitching. [0003] In the multi-channel CCD mosaic image, due to the corresponding difference of the pixels caused by the CCD area array process, the gain, dark current, wiring and other factors between each channel, the brightness and chromaticity of different ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232H04N5/235
CPCH04N23/682H04N23/71
Inventor 徐彪周波徐星
Owner ZHEJIANG UNIVIEW TECH CO LTD
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