Aiming at the problems of uneven distribution of grayscale values and high noise in images caused by uneven lighting,as well as poor visual communication effect,a visual information compensation based method for enhancing images with uneven lighting is proposed.Calculate the pixel grayscale values of different targets and background regions in the image,construct a grayscale attenuation sequence,construct an attenuation function to weight each background point around the weakest pixel,and use a homomorphic filtering function to denoise based on changes in the component of light in the image.By using the visual information compensation method to calculate the pixel values of each region in the graph,and converting them into component modes,complementary enhancement is implemented based on the total brightness value and local values.The experimental data proves that the proposed method has good enhancement effect,improved image clarity,and good detail characterization effect.
关键词
视觉信息补偿/光照不均/图像增强/灰度衰减函数/亮度总量值
Key words
visual information compensation/uneven illumination/image enhancement/gray attenuation function/total brightness value
维普
万方数据