convolution filter which can be used to perform convolution to two functions. useful when you are trying to compress videos and images using convolution/multiplication method

有源码，适合学习C++的人 一、 读入一幅灰度图象，编写程序显示图象中任一象素点的灰度值。 二、 编程实现RGB彩色空间到HSV彩色空间的转换，并通过调整H、S、V的值实现图像亮度、色度和色饱和度的调节。 三、 1.灰度线性变换、分段线性变换 2.灰度直方图均衡、规格化 3.图象卷积：各种模板实现低通、高通滤波 4.图象中值滤波、最大值滤波、最小值滤波、模板选择滤波 5.伪彩色图象增强 四、 1.图象的加、减、乘、除和逻辑运算。 2.图象的镜像变换、图象的缩放

中值平均滤波法，中值滤波是一种非线性滤波，一般用来处理图像的椒盐噪声。当用来保持边缘同时滤波的要求下，中值滤波要比卷积滤波更加有效。-Median filter is a nonlinear filtering, usually used for salt and pepper noise image processing. When the filter is used to keep the edge of the filter, the median filter is more effe

二维图像的投影和图像重建，直接傅里叶反变换法，先反投影后滤波，先滤波后反投影，卷积反投影(Two dimensional image projection and image reconstruction, direct Fourier inverse method, first backprojection, after filtering, first filter, back projection, convolution back projection)