A Moiré Compensation Method for OLED Screen Brightness Gray Scale Image

Abstract

The invention discloses a moiré compensation method for brightness grayscale images of OLED screens, and belongs to the technical field of image processing. Based on the moiré pattern skeleton, the present invention locates the area range of the moiré pattern, calculates the compensation value of the corresponding area, and finally compensates the corresponding position of the original image according to the generated moiré pattern area mask map. The moiré area is essentially a concave curve of the gray value, the original gray value - the gray value filtered by the small window, this operation can roughly retain the high-frequency jitter of the brightness data, and distribute the gray value in the area Pull it to 0 gray value; add the corresponding area compensation value to make the gray value distribution of the moiré area similar to that of the normal area. The moiré mask only performs moiré compensation on the mask area. While compensating the luminance data of the moiré area, it does not affect the luminance data of other normal imaging areas, which can improve the accuracy of the subsequent OLED screen correction and avoid the Miscorrection caused by moiré.

Description

technical field [0001] The invention belongs to the technical field of image processing, and more particularly relates to a method for compensating moiré of brightness grayscale images of OLED screens. Background technique [0002] The OLED screen has the advantages of wide viewing angle, high contrast ratio, low power consumption, extremely high response speed, bendability and simple manufacturing process. OLED display technology can be divided into Passive Matrix (PMOLED) and Active Matrix (AMOLED) according to different driving methods. Currently, AMOLED products are used in mobile phones. OLED is driven by current, and AMOLED can selectively adjust the brightness of each pixel independently. This characteristic also leads to display defects that may occur in the manufacturing process of OLED screens, such as uneven brightness, which reduces the quality of the display. [0003] In order to improve the quality of the factory OLED screen, many screen inspection steps are o...

AI Technical Summary

Problems solved by technology

The frequency data removed by these methods is not necessarily only the moiré data, which will cause the brightness data of the normal area except the moiré to be disturbed, thus affecting the correction of the subsequent OLED screen

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