Flicker correction method and flicker correction device
A correction equipment and rough correction technology, applied in the field of video processing, can solve the problems of high computational complexity, general effect, and poor real-time performance of flicker correction technology.
Active Publication Date: 2018-09-04
FUJITSU LTD
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Problems solved by technology
[0003] Traditional flicker correction technology has high computational complexity, mediocre effect, and poor real-time performance
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[0017] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It should be understood, however, that in developing any such practical implementation, many implementation-specific decisions must be made in order to achieve the developer's specific goals, such as meeting those system- and business-related constraints and those Restrictions may vary from implementation to implementation. Moreover, it should also be understood that development work, while potentially complex and time-consuming, would at least be a routine undertaking for those skilled in the art having the benefit of this disclosure.
[0018] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the device structure and / or processing steps closely related ...
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The invention discloses a flicker correction method and a flicker correction apparatus. The flicker correction method according to the invention comprises the steps of dividing an image to be corrected in an input image frame sequence into a plurality of blocks of the same size along the direction of a line from the start of the line to the end of the line, each block including a plurality of continuous rows of the image to be corrected; generating a line mean vector constituting an average pixel value of each line of each block; calculating the mean vector of the line mean vector of the corresponding block of the image to be corrected corresponding to continuous 3t frames of the current image to be corrected, and using the mean vector as the frame mean vector of the corresponding block to the current image to be corrected, where t is a positive integer; and performing division of the line mean vector of each block and corresponding elements of the frame mean vector of the block, and taking the vector constituted by the obtained quotient as a rough correction parameter vector of the block, wherein each element of the vector is the common rough correction parameter of the pixels of the corresponding line of the block; and according to the rough correction parameter of each pixel, obtaining a correction value of the pixel.
Description
technical field [0001] The present invention generally relates to the field of video processing. Specifically, the present invention relates to a flicker correction method and a flicker correction device capable of correcting flicker in a sequence of image frames. Background technique [0002] In recent years, CMOS image sensors have been widely used in various image capturing devices, such as digital still cameras, digital video cameras, mobile phones, and the like. During the photoelectric conversion process, the photoelectric conversion moment of each pixel or each row of pixels is inconsistent, so there will be bright and dark horizontal bands in the captured image, especially under fluorescent lighting or other lighting conditions where the brightness changes periodically case of capture. This horizontal banding in the captured image caused by the periodic variation of the illumination light is called flicker. [0003] The traditional flicker correction technology ha...
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IPC IPC(8): H04N5/235H04N5/243
Inventor 伍健荣
Owner FUJITSU LTD