中文说明：同态滤波的想法是希望将影像分成照明(低频)及反射(高频)这两种成分，也就是可以利用这个系统达到影像动态范围的压缩及对比度增强的效果。处理步骤是先将影像取自然对数在做傅立叶转换乘上我们的同态滤波器，同态滤波器意思是在一般像是高斯率波器上乘上一个(rH-rL)再加上rL因此可以藉由调整这两个参数来改变影像的强化的程度，再来在作傅立叶反转换然后取指数最后输出结果
English Description：
The idea is to homomorphic filtering the image into the lighting (low frequency) and reflection (high frequency) of these two components, that is, you can use this system to achieve a dynamic range compression and image contrast enhancement effect. Image processing step is the first natural logarithm doing Fourier transform multiplied our homomorphic filter, homomorphic filter means in general like a Gaussian filter high rate on a (rH-rL) plus rL Therefore, these two parameters can be adjusted by changing the degree of enhanced images come in for the conversion and then take the inverse Fourier final output index