一种新的基于FFT的图像增强算法

A new image enhancement method based-on FFT

针对散焦模糊和噪声的频域特点,提出了一种基于FFT的频域图像增强算法。设计了高通倒高斯滤波器与低通反正切滤波器,使得图像去噪的同时又保留了细节。并研究了抑制振铃的算法,去除了频域加窗对图像的影响,对于增强图像的质量有显著的效果。

In addition to considering the character of blur and noise fully, it is presented a new method based - on FFT. An inverse - gauss high pass filter and a low pass filter are designed to enhance image quality, which not only denoise but also reserve the fine information of image. And a ring suppression algorithm is studied to reduce the effect of adding window in frequency. It is proved that the method is effective to enhance image quality.