If resetting energy values in the peaks, the image texture from IFFT will be blurred even removed.Consequently, the contrast of texture and defect will be strengthened.

• 如果将这些频率处集中的能量置零，通过傅立叶逆变换得到的图像纹理会被模糊甚至去除，瑕疵与纹理的对比度得到增强；