YUV RGB 格式转换

第一个公式是RGB转YUV（范围0-255）时用的，第二个公式是用在YUV转换RGB（范围0-255)时用的。
1.

Y =  0.257 * R + 0.504 * G + 0.098 * B + ;
U = -0.148 * R - 0.291 * G + 0.439 * B + ;
V =  0.439 * R - 0.368 * G - 0.071 * B + ;

黑色：Y=16 ，U= V =128

红色：Y=82 ，U=90，V=240

绿色：Y=145，U=54，V=34

蓝色：Y=41 ，U=240，V=110

黄色：Y=210，U=16， V=146

暗红：Y=58，  U=104，V=192

aaarticlea/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB4AAAAQCAIAAACOWFiFAAAAHElEQVQ4jWP4H+pLI8QwavSo0aNGjxo9ajT1EABKzw4OMMhUQQAAAABJRU5ErkJggg==" alt="" />:  Y=132，U=99， V=203

aaarticlea/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB0AAAAQCAIAAABlb+OGAAAAHElEQVQ4jWNwi/hLC8Qwau6ouaPmjpo7ai5eBADFwekPB2sHcwAAAABJRU5ErkJggg==" alt="" />：Y=103，U=203，V=108

2.

B =  1.164 * (Y - ) +  2.018 * (U - );
G =  1.164 * (Y - ) -  0.391 * (U - ) - 0.813 * (V - );
R =  1.164 * (Y - )                      + 1.596 * (V - );

一个简单的RGB转换YUV的小程序（仅仅是方便计算颜色值）

 #include <iostream>
 #include <stdio.h>
 using namespace std;

 int main()
 {
     int R,G,B;
     int Y,U,V;
     cout << "Please input the R,G,B:(eg:255 0 0)" << endl;
     cin>>R>>G>>B;
     Y =  0.257 * R + 0.504 * G + 0.098 * B +    +0.5;
     U = -0.148 * R - 0.291 * G + 0.439 * B +   +0.5;
     V =  0.439 * R - 0.368 * G - 0.071 * B +   +0.5;//加上0.5是为了四舍五入
     cout<<"R,G,B: "<<R<<" "<<G<<" "<<B<<endl;
     cout<<"Y,U,V: "<<Y<<" "<<U<<" "<<V<<endl;
     getchar();　　getchar();　　　　return ;
 }

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参考网址：

http://blog.sina.com.cn/s/blog_5713096b0100059i.html

http://www.fourcc.org/fccyvrgb.php

http://en.wikipedia.org/wiki/YUV

另附UYVY数据转换成OpenCV中的BGR代码一段：）

这里的尺寸是720x576

void YUV2BGR(unsigned char *srcData, unsigned char *destData)
{
    int R,G,B;
    int Y,U,V;

    for (int height=; height<; height++)
    {
        for (int width=; width<; width++)
        {
            Y = srcData[height** + width* +  ];
            U = (width%==) ? srcData[height** + width* + ] : srcData[height** + width* +  ];
            V = (width%==) ? srcData[height** + width* +  ] : srcData[height** + width* -  ];

            B = ( * (Y - ) +  * (U - ))/;
            G = ( * (Y - ) -  * (U - ) -  * (V - ))/;
            R = ( * (Y - ) +  * (V - ))/;

            if (R>)    R=;    if(R<)    R=;
            if (G>)    G=;    if(G<)    G=;
            if (B>)    B=;    if(B<)    B=;

            destData[height *  *  + width* + ] = (unsigned char)B;
            destData[height *  *  + width* + ] = (unsigned char)G;
            destData[height *  *  + width* + ] = (unsigned char)R;
        }
    }
}