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Image processing method and device

An image processing and current image technology, applied in the field of image processing, can solve the problem of difficult false color phenomenon at the edge of moving objects, etc., and achieve the effect of small operation difficulty, suppression of false color phenomenon, and simple processing

Active Publication Date: 2014-08-06
ZHEJIANG DAHUA TECH CO LTD
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Problems solved by technology

[0009] The embodiment of the present invention provides an image processing method and device to solve the problem that it is difficult to suppress the false color phenomenon on the edge of the moving object in the existing image frame

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Embodiment Construction

[0024] In the wide dynamic technology, the existing motion compensation method and the end time alignment method of multiple exposures are used to suppress the phenomenon of green fringing or purple fringing (called "false color") on the edge of the moving object in the image frame , although it can play a certain inhibitory effect, but it is more difficult to operate. In view of the above problems, the embodiments of the present invention provide an image processing method and device, which can find the false color ( That is, the pixel blocks on the edge of green or purple), and then use the repair algorithm to repair these pixel blocks, so as to better suppress the phenomenon of false color edges of moving objects in the image frame, and the operation is relatively easy, that is, the difficulty is small.

[0025] The specific implementation manners of an image processing method and device provided in the embodiments of the present invention will be described below with refer...

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Abstract

An embodiment of the invention provides an image processing method and device. The image processing method includes segmenting a currently input image frame into a plurality of pixel blocks; for each segmented pixel block, sequentially judging whether each pixel block is located at the false-color edge of a moving object in the current image frame or not and within an annular area or not according to the set sequence and the preset condition; if the pixel block is arranged at the false-color edge and not in the annular area, repairing color components of pixel points where false colors are arranged in the pixel block according to pixel information of another judged pixel block adjacent to the pixel block, continuously judging the next pixel block after repairing until all the pixel blocks are judged, and obtaining the repaired image frame. According to the preset condition, the wide dynamic image frame comprising the moving object is processed, the problem of false colors at the edge of the moving object in the image frame can be suppressed by the repair algorithm, and the image processing method is simple and feasible and is low in difficulty.

Description

technical field [0001] The present invention relates to the field of image processing, in particular to an image processing method and device. Background technique [0002] With the continuous improvement of people's requirements for cameras, wide dynamic technology has become one of the indispensable technologies in video surveillance. Whether it is a digital camera used in daily life or a monitoring device used in the security field, wide dynamic technology has received special attention. [0003] The so-called wide dynamic technology is a technology used to allow the camera to see more features of the image under very strong contrast. Specifically, when high-brightness areas illuminated by strong light sources (sunlight, lamps, or reflections, etc.) and relatively low-brightness areas such as shadows and backlights exist in the image at the same time, the output image of the camera will appear bright areas due to overexposure It appears white, and dark areas appear blac...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/355H04N5/235H04N9/04
Inventor 程敏刘晓沐张兴明傅利泉朱江明吴军吴坚
Owner ZHEJIANG DAHUA TECH CO LTD
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