YUYV格式到RGB格式的转换： 为什么YUYV格式要转到RGB格式，视频的显示调用的多数API都是基于RGB格式，所以需要进行格式的转换。YUYV格式如下： Y0U0Y1V0 Y2U1Y3V1.......... 说明：一个Y代表一个像素，而一个Y和UV组合起来构成一个像素，所以第0个像素Y0和第一个像素Y1都是共用第0个像素的U0和V0。而每个分量Y，U，V都是占用一个字节的存储空间。所以Y0U0Y1V0相当于两个像素，占用了4个字节的存储空间，平均一个像素占用两个字节。 RGB格式： R0G0B0 R1G1B1......... 说明：一个像素由三个分量构成，即一个像素占用三个字节。 YUV到RGB的转换有如下公式： R = 1.164*(Y-16) + 1.159*(V-128); G = 1.164*(Y-16) - 0.380*(U-128)+ 0.813*(V-128); B = 1.164*(Y-16) + 2.018*(U-128)); int yuvtorgb0(unsigned char *yuv, unsigned char *rgb, unsigned intwidth, unsigned int height){ unsigned int in, out; int y0, u, y1, v; unsigned int pixel24; unsigned char *pixel = (unsigned char *)&pixel24; unsigned int size = width*height*2; for(in = 0, out = 0; in { y0 = yuv[in+0]; u = yuv[in+1]; y1 = yuv[in+2]; v = yuv[in+3]; sign3 = true; pixel24 = yuvtorgb(y0, u, v); rgb[out+0] = pixel[0]; //for QT rgb[out+1] = pixel[1]; rgb[out+2] = pixel[2]; //rgb[out+0] = pixel[2]; //for iplimage //rgb[out+1] = pixel[1]; //rgb[out+2] = pixel[0]; //sign3 = true; pixel24 = yuvtorgb(y1, u, v); rgb[out+3] = pixel[0]; rgb[out+4] = pixel[1]; rgb[out+5] = pixel[2]; //rgb[out+3] = pixel[2]; //rgb[out+4] = pixel[1]; //rgb[out+5] = pixel[0]; } return 0;}int yuvtorgb(int y, int u, int v){ unsigned int pixel24 = 0; unsigned char *pixel = (unsigned char *)&pixel24; int r, g, b; static long int ruv, guv, buv; if(sign3) { sign3 = false; ruv = 1159*(v-128); guv = 380*(u-128) + 813*(v-128); buv = 2018*(u-128); } r = (1164*(y-16) + ruv) / 1000; g = (1164*(y-16) - guv) / 1000; b = (1164*(y-16) + buv) / 1000; if(r > 255) r = 255; if(g > 255) g = 255; if(b > 255) b = 255; if(r if(g if(b pixel[0] = r; pixel[1] = g; pixel[2] = b; return pixel24;}
