数字图像处理：先进行傅里叶变换，然后低通滤波；最后还原。并附有余弦变换对照结果。,DIP:first FFT,then Butterworth filter,last inverse the course,also the DCT for comparition.

java处理数字图像，包括镜像、中值滤波、线形灰度变化、图像像平滑、图像模糊、图像还原、锐化、量化、二值化图像、边缘检测等 -java processing digital images, including mirroring, median filtering, linear grayscale change images like smooth, fuzzy images, image reduction, sharpening, quantify, binarization imag