计算机科学 ›› 2018, Vol. 45 ›› Issue (2): 297-300.doi: 10.11896/j.issn.1002-137X.2018.02.051
赵军辉,吴玉峰,胡坤融,蒲斌
ZHAO Jun-hui, WU Yu-feng, HU Kun-rong and PU Bin
摘要: 针对低照度图像对比度增强处理中的细节保留和色彩恒常问题,提出一种新颖的基于Lab色彩空间和色调映射的Retinex图像对比增强算法。首先,在Lab色彩空间中将一个低对比度的输入图像分解成亮度和色度分量,并使用自适应双边滤波估计照明的强度,以便根据亮度和颜色值来考虑合适的相邻像素。然后利用基于抛物线的色调映射函数来提高估计光照图像的对比度。最后,将加强的亮度和原始的色度结合在一起以产生一个增强的彩色输出图像。实验结果表明,所提算法通过减弱图像伪影增强了图像的细节和边缘结构,同时通过避免色彩偏移较好地保留了图像的自然度。
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