完整实现了图像的灰度化，通过C语言的编程，内部含有完整的图像,适合新手学习图像处理-Full implementation of the gray-scale image, the C programming language, contains an internal complete image, suitable for novice learning image processing

一个transform filter，输入为RGB24格式视频，输出为灰度视频。-A transform filter, the input is RGB24 format video output to grayscale video.

rgb转灰度的源码，现在很多rgb转灰度图像都会存在失真，解决该问题-code for rgb2gray