Image stroboscopic detection method and device, storage medium, and terminal
A detection method and stroboscopic technology, applied in image communication, television, electrical components, etc., can solve the problems of high computational complexity, achieve the effects of reducing computational complexity, eliminating waveform noise, and improving accuracy
Active Publication Date: 2022-02-01
SPREADTRUM COMM (SHANGHAI) CO LTD
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[0004] However, the computational complexity of the prior art is high
[0005] The inventors of the present invention have found through research that in the prior art, it is necessary to use discrete Fourier transform to calculate the one-dimensional discrete Fourier transform corresponding to 100Hz and 120Hz for all pixels in each row in line units for the difference image. Transform coefficients, determine which frequency is dominant from the frequency domain results to guide the adjustment of the current exposure information, that is, the conversion operation from the pixel domain to the frequency domain is required during the processing process, resulting in high computational complexity
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[0064] With the rapid iteration of consumer electronics and industrial electronics, cameras have become the standard configuration of many embedded devices. The imaging element of the current mainstream embedded camera equipment is a combination of complementary metal oxide semiconductor (CMOS) and rolling shutter. This type of element is easily affected by strobe under the condition of AC power lighting device, resulting in the preview image quality dropped sharply.
[0065] As mentioned above, there will be stroboscopic flicker in the captured image, and the processing object of the current commonly used image stroboscopic detection method is the difference image of two adjacent frames during the shooting process, which can be better on the basis of effectively removing the background information of the image. Preserve the stroboscopic features in the image. However, the computational complexity of the prior art is relatively high.
[0066] Specifically, in an existing spe...
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An image stroboscopic detection method and device, a storage medium, and a terminal, the method comprising: providing at least three consecutive frames of images; extracting a brightness column vector of each frame of image, and each brightness vector in the brightness column vector is used for Indicating the brightness value of the smallest unit in each row in the image; based on the brightness column vectors of the at least three frames of images, determining a stroboscopic statistical value, the stroboscopic statistical value is used to indicate the number of stroboscopic flashes of each of the brightness vectors; at least According to the stroboscopic statistical value, it is determined whether there is stroboscopic in the at least three frames of images. The invention can effectively reduce the computational complexity.
Description
technical field [0001] The present invention relates to the technical field of image detection, in particular to an image stroboscopic detection method and device, a storage medium, and a terminal. Background technique [0002] Since the energy of the AC power source changes periodically with time, when the light source is working under such a power source, if the exposure information of the shooting device does not match the frequency of the light source, there will be errors caused by the difference in light intensity during the exposure process when shooting images. Light and dark changes. And because the exposure strategy of the Complementary Metal Oxide Semiconductor (CMOS) element is row-by-row exposure and there is a time difference between rows, the rolling phenomenon of light and dark changes occurs, which is the root cause of stroboscopic flicker in the captured image. [0003] The currently commonly used image stroboscopic detection method processes the differenc...
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IPC IPC(8): H04N17/00
CPCH04N17/00
Inventor 严敬仁汪涛蔡进陈欢彭晓峰
Owner SPREADTRUM COMM (SHANGHAI) CO LTD