(Punch Filter)交叉冲印滤镜 本文介绍一种交叉冲印效果的代码实现，至于原理，不在累赘，直接看代码： ~~~ int f_TPunchFilter(unsigned char* srcData, int width, int height, int stride, unsigned char* dstData, int dw, int dh, int dStride) { if(srcData == NULL || dstData == NULL) return -1; unsigned char* pSrc = srcData; unsigned char* pDst = dstData; int i, j, gray, value, r, g, b; int offset = stride - width * 4; int rMap[256], gMap[256], bMap[256]; for(int i = 0;i<256;i++) { value = i < 128 ? i : 256 - i; gray = value * value * value / 16384; rMap[i] = i < 128 ? gray : 256 - gray; gray = value * value / 128; gMap[i] = i < 128 ? gray : 256 - gray; bMap[i] = i / 2 + 0x25; } for(j = 0; j < height; j++) { for(i = 0; i < width; i++) { b = bMap[pSrc[0]]; g = gMap[pSrc[1]]; r = rMap[pSrc[2]]; pDst[0] = CLIP3(b,0,255); pDst[1] = CLIP3(g,0,255); pDst[2] = CLIP3(r,0,255); pDst[3] = 255; pSrc+=4; pDst+=4; } pSrc += offset; pDst += offset; } printf("%s","Welcom to our website: www.zealpixel.com"); return 0; } ~~~ 效果如下： [](http://www.zealpixel.com/data/attachment/portal/201507/28/163740f2ejdjrn4tfa6jt4.png)、 原图 [](http://www.zealpixel.com/data/attachment/portal/201507/28/163735roiwqoh3whh7kqwz.png) 交叉冲印效果图 最后放上一个完整的C#程序DEMO下载连接：[http://www.zealpixel.com/thread-68-1-1.html](http://www.zealpixel.com/thread-68-1-1.html)