基于空域的光照不均匀图像的增强和校正-《集美大学学报（自然科学版）》

文章信息/Info

Title:: Enhancement and Adjustment for Non-Uniform Illumination Image Based on Spatial Domain

Author(s):: HU Yue; (Chengyi University College,Jimei University,Xiamen 361021,China)

Keywords:: non-uniform illumination image; spatial domain; homomorphic filtering; image enhancement; adjustment

摘要:: 针对光照不均匀引起的图像质量欠佳的问题，提出采用空域同态滤波处理使得图像偏暗部分得到增强的新方法：利用多尺度高斯函数提取出光照分量，采用光照分量与灰度图像融合的方法，校正图像过亮部分和偏暗部分。对于真彩色图像，先将图像由RGB空间转换到HSV空间，然后对亮度分量进行同态滤波和校正处理，最后将处理后的图像由HSV空间转换回RGB空间。仿真实验结果表明，对于光照不均匀的图像，采用空域同态滤波方法，具有容易实现、速度快等优点，能够取得较满意的处理效果。

Abstract:: In view of the poor image quality due to uneven illumination,the paper discusses how to enhance the dim part of the image by using spatial homomorphism filtering.Extract the light component by using the multi-scale Gaussian function,and adjust the overlit part and the dark part of the image by fusing the light component and the gray image.For the true color image,the RGB image is converted from RGB space to HSV space,then the luminance component is filtered and adjusted,finally the processed image is converted from HSV space to RGB space.The simulation results show that the spatial homomorphic filtering method can achieve satisfactory enhancement effect for the image with uneven illumination and the advantages of easy implementation and fast speed.