使用F1~F4控制转换灰度的方式，F5为增加图象的对比度。图像为一花的3D茶壶-F1 ~ F4 control the use of gray-way conversion, F5 to increase the contrast of images. Image is a 3D flower pot

The DirectShow EZRGB24 filter is an image processing transform filter. This filter performs a number of individual video effects, including red, green, blue, darken, XOR, blur, gray, and emboss effects.

DirectX的图象灰度处理示例　VC源码-图像处理--DirectX gray image processing VC source- image processing