简单的matlab程序。提供给一种简单地处理图像中光照不匀的方法。图像的特征为中间偏暗，四周亮。-Simple matlab program. Provided to a simple processing of the image illumination unevenness. The characteristics of the image dim middle, surrounded by light.

基于matlab的数字图像处理，频域上进行高通滤波以实现同态滤波，对灰度图像偏暗的图像进行图像增强。-Matlab-based digital image processing, high-pass filter in the frequency domain in order to achieve homomorphic filtering, dim gray image image image enhancement.