Gaussian Blur use in image processing and low pass filter.in this source first calculate Gauss Kernel .

canny edge detector is the best edge detection in the image processing field.in the first guassian blur in the image and then use sobel filter to get magnitude image

Delphi:Delphi中值滤波，一个Delphi图像处理的小例子，有需要的可下载参考。 -Delphi: Delphi median filter, a Delphi image processing small example, there is a need to download the reference.