Chinese Journal of Liquid Crystals and Displays, Volume. 36, Issue 10, 1403(2021)

Image enhancement processing algorithm for LED display screens using dithering matrix

SUN Jian-zhe1,2、*, ZHENG Xi-feng1,3,4, XU Zi-cheng3, CHENG Hong-bin1,3, and CHEN Yu-feng3
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  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
  • 4[in Chinese]
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    In order to solve the problems of image brightness loss and gray-level jump in low grayscale conditions of LED display screens, a low grayscale image enhancement processing algorithm for LED display screens using dither matrix is proposed. According to the principle of LED display and the image enhancement principle of traditional dithering algorithm, the concept of “decimal gray level” of LED display is proposed, and then the “decimal gray level” data that enhances the display effect of each pixel is obtained according to related methods such as testing. The dither matrix realizes its corresponding “decimal gray level” in accordance with the “principle of minimum error” in 4 frames of images. The sub-pixel dithering technology is used to further reduce the flicker caused by the image jitter to the human eyes. The algorithm was compared and simulated with Matlab software to verify the feasibility and effectiveness of the algorithm. The experimental results show that the algorithm has a significant improvement effect on the uneven transition of the low gray level of the LED display screen, and the gray level display ability of the gray level below 10 is increased to 4 times of the original. At the same time, the minimum controllable gray level brightness becomes 15%~25% of the original, which improves the contrast of the LED display.

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    SUN Jian-zhe, ZHENG Xi-feng, XU Zi-cheng, CHENG Hong-bin, CHEN Yu-feng. Image enhancement processing algorithm for LED display screens using dithering matrix[J]. Chinese Journal of Liquid Crystals and Displays, 2021, 36(10): 1403

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    Paper Information

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    Received: Jul. 21, 2021

    Accepted: --

    Published Online: Nov. 6, 2021

    The Author Email: SUN Jian-zhe (814962114@qq.com)

    DOI:10.37188/cjlcd.2021-0192

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