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西安航空学院 电子工程学院, 陕西 西安 710000
Received:19 October 2020,
Revised:25 November 2020,
Published:2021-06
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Wen GAO, Hai-feng XIAO. Low illumination color image enhancement based on dynamic bistable stochastic resonance[J]. Chinese journal of liquid crystals and displays, 2021, 36(6): 861-868.
Wen GAO, Hai-feng XIAO. Low illumination color image enhancement based on dynamic bistable stochastic resonance[J]. Chinese journal of liquid crystals and displays, 2021, 36(6): 861-868. DOI: 10.37188/CJLCD.2020-0283.
针对非均匀低照度图像增强问题,提出了一种动态双稳随机共振算法。该算法基于双稳态随机共振模型,将图像中的噪声能量转移到低照度区域,能有效对低照度图像进行亮度增强。在研究过程中设定了低照度像素的迭代阈值,避免了高亮度区域的过度增强,可保证图像具有较好的视觉感受。研究采用感知质量评估(PQA)和亮度阶误差(LOE)作为图像质量的评价指标,通过对比实验发现,所设计算法的PQA值最接近10,增强图像的质量最好,同时LOE值在67~204之间,图像自然性保存最优。
A dynamic bistable stochastic resonance algorithm is proposed to solve the problem of non-uniform low illumination image enhancement. Based on the bistable stochastic resonance model
the noise energy in the image is transferred to the low illumination area
which can effectively enhance the brightness of the low illumination image. In the research process
the iterative threshold of low-illumination pixel is set to avoid the excessive enhancement in high-luminance areas
which can ensure the image has better visual perception. Perceived Quality Assessment (PQA) and Luminance Order Error(LOE) are used as the evaluation index of image quality. Through comparative experiments
it is found that the PQA value of the designed algorithm is closest to 10
which enhances the image quality best
while the LOE value is between 67 and 204
and the image nature is the best.
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