YUV422 --> RGB 代码

谁践踏了优雅 2022-06-18 07:16 236阅读 0赞

原文：[http://blog.csdn.net/zhongnanjun\_3/article/details/3941974][http_blog.csdn.net_zhongnanjun_3_article_details_3941974]

/\*  
R = Y + 1.4075 \*（V-128）  
 G = Y – 0.3455 \*（U –128） – 0.7169 \*（V –128）  
 B = Y + 1.779 \*（U – 128）  
\*/  
unsigned char GetYUVR(int nY,int nU,int nV)  
\{  
    int nR;    //V=nV-128  
    nR = nY + (nV-128)+((nV-128)\*103>>8);// v + ((v \* 103) >> 8);  
    //overflow?  
    if( nR > 255 )  
    nR = 255;  
    if( nR < 0 )  
    nR = 0;      
    return nR;  
\}  
unsigned char GetYUVG(int nY,int nU,int nV)  
\{  
    int nG;    //U = nU-128  
    nG = nY - (((nU-128)\*88>>8)+((nV-128)\*183>>8));//((u \* 88) >> 8) +((v \* 183) >> 8);  
    //overflow?  
    if( nG > 255 )  
    nG = 255;  
    if( nG < 0 )  
    nG = 0;      
    return nG;      
\}  
unsigned char GetYUVB(int nY,int nU,int nV)  
\{  
    int nB;  
    nB = nY + (nU-128)+((nU-128)\*198>>8);//u +( (u\*198) >> 8);  
    //overflow?  
    if( nB > 255 )  
    nB = 255;  
    if( nB < 0 )  
    nB = 0;          
    return nB;  
\}  
  
nPixelData = ( nR&0xF8 ) | nG>>5;  
    SoPbSPITXByte( nPixelData);//R5G6B5 :high  
       
    nPixelData    = ( nG<<3 &0xE0) | nB>>3;  
    SoPbSPITXByte( nPixelData );//R5G6B5 :Low  
//  
想看看彩色图片的黑白效果 看看：  
    nPixelData = ((\* nPIC)&0xF8 )| (\* nPIC)>>5 ;//R=G=B=Y:R5G6B5 :high  
    SoPbSPITXByte( nPixelData);//(\*(unsigned char\*)DataAddr);//  
      
    nPixelData    = ((\* nPIC)<<3 &0xE0) | (\* nPIC)>>3;//Y0//R=G=B=Y:R5G6B5 :Low  
    SoPbSPITXByte( nPixelData );//R5G6B5 :Low

[http_blog.csdn.net_zhongnanjun_3_article_details_3941974]: http://blog.csdn.net/zhongnanjun_3/article/details/3941974