在具体进行频率域的各种处理滤波的前后,进行了傅立叶变换以及傅立叶反变换.这两个变换的过程就是将空间的信息分解为在频率上的表示,或者将频率上的表示转化为空间上的表示,两种变换是互为逆变换的.正是通过傅立叶正反变换的处理,才使得频率域上的处理可以用于图像的增强-After various processes in a specific frequency domain filter, carried out a Fourier transform and inverse Fourier transform, which is the process of converting two spatial information is represented on the decomposition of the frequency, or frequency conversion means for space indicates, the two are mutually transform inverse transform. precisely by processing the Fourier transform of the pros and cons before making the deal with the frequency domain can be used for image enhancement