Image moiré elimination method, device and LED display correction method
A technology of LED display and moiré pattern, which is applied to static indicators, instruments, etc., and can solve problems affecting the correction effect of LED display
Active Publication Date: 2021-09-17
SHENZHEN LIDING PHOTOELECTRIC TECH
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[0002] LED display is a kind of flat-panel display, which is widely used in many aspects, such as outdoor advertising, shopping malls, etc. Before using the LED display, it is necessary to calibrate the LED display to ensure the display effect. The current calibration method The corrected image is mainly obtained by shooting the LED display screen with a camera and other instruments, and the point-by-point correction is realized based on the corrected image. However, at present, most of the corrected images obtained by shooting the LED display screen with a camera and other instruments have moiré, and the moiré is a part of the beat-beating principle. This kind of performance, if the spatial frequency of the CCD / CMOS pixel of the photosensitive element of the camera is close to the spatial frequency of the image stripes displayed on the LED display screen, moiré will be affected by the interference of moiré. When the correction method is to use the correction method with moiré When the image is corrected for the LED display, it will directly affect the correction effect of the LED display
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[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] In one embodiment of the present invention, a method for eliminating image moiré is provided, such as figure 1 Shown, the elimination method of image moiré comprises the following steps:
[0024] Step S101: Acquire a first corrected image.
[0025] The first corrected image is an image captured by a camera after the LED display is turned on, and the first corrected image is an image formed in the time domain. Specifically, the camera may be a single-lens re...
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The invention provides an image moiré elimination method, device and LED display screen correction method. The image moiré elimination method includes acquiring a first corrected image; generating an LED light point brightness map according to the first corrected image; converting the LED light point brightness map to is the second corrected image in the frequency domain; input the second corrected image into the preset moiré image recognition model, obtain the confidence probability that each pixel in the second corrected image is moiré, and generate a confidence probability map ; Filtering the second corrected image according to the confidence probability map to generate a filtered image; transforming the filtered image into a third corrected image in the time domain. The above method can effectively identify and eliminate the moiré in the image. Before the LED display is corrected, the moiré in the LED calibration image can be eliminated. When the LED calibration image is used for subsequent calibration, the interference of the moiré can be avoided. Excellent display effect, effectively solve the problem of uneven brightness of the LED display caused by moiré.
Description
technical field [0001] The invention relates to the field of LED display screen correction, in particular to an image moiré elimination method, device and LED display screen correction method. Background technique [0002] LED display is a kind of flat-panel display, which is widely used in many aspects, such as outdoor advertising, shopping malls, etc. Before using the LED display, it is necessary to calibrate the LED display to ensure the display effect. The current calibration method The corrected image is mainly obtained by shooting the LED display screen with a camera and other instruments, and the point-by-point correction is realized based on the corrected image. However, at present, most of the corrected images obtained by shooting the LED display screen with a camera and other instruments have moiré, and the moiré is a part of the beat-beating principle. This kind of performance, if the spatial frequency of the CCD / CMOS pixel of the photosensitive element of the cam...
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IPC IPC(8): G09G3/32
CPCG09G3/32G09G2320/0233
Inventor 何志民
Owner SHENZHEN LIDING PHOTOELECTRIC TECH