最近有人在网上问我，YUV的值对应的颜色是如何的

下面给出YUV值对应的颜色关系

256张图512x512，每张对应的Y为0~255   每4x4对应的是同一颜色区域  横坐标 U  纵坐标V

yuv下载地址

http://download.csdn.net/detail/cabbage2008/9314683

这里截取了Y=0,10,20,60,128,250,255几张

Y=0

Y=10

Y=20

Y=60

Y=128

Y=250

Y=255

生成代码：

#include <stdlib.h>
#include <stdio.h>
#include <string.h>typedef       void                Void;
typedef       bool                Bool;
typedef       int                 Int;
typedef       unsigned char       UChar;
typedef       UChar               Pel;        ///< 16-bit pixel typeclass TComPicYuv
{
private:// ------------------------------------------------------------------------------------------------//  YUV buffer// ------------------------------------------------------------------------------------------------Pel*  m_apiPicBufY;           ///< Buffer (including margin)Pel*  m_apiPicBufU;Pel*  m_apiPicBufV;// ------------------------------------------------------------------------------------------------//  Parameter for general YUV buffer usage// ------------------------------------------------------------------------------------------------Int   m_iPicWidth;            ///< Width of pictureInt   m_iPicHeight;           ///< Height of picturepublic:TComPicYuv         ();virtual ~TComPicYuv();// ------------------------------------------------------------------------------------------------//  Memory management// ------------------------------------------------------------------------------------------------Bool  create      ( Int iPicWidth, Int iPicHeight );Void  destroy     ();Void  setYuv      (Pel pixelY,Pel pixelU,Pel pixelV);Void  setPixel    (int posX, int posY, int width, Pel pixelY,Pel pixelU,Pel pixelV);// ------------------------------------------------------------------------------------------------//  Get information of picture// ------------------------------------------------------------------------------------------------Pel*  getPicBufY  ()     { return m_apiPicBufY ; }Pel*  getPicBufU  ()     { return m_apiPicBufU ; }Pel*  getPicBufV  ()     { return m_apiPicBufV ; }Int   getWidth    ()     { return  m_iPicWidth;    }Int   getHeight   ()     { return  m_iPicHeight;   }Int   getStride   ()     { return  m_iPicWidth ;    }Int   getCStride  ()     { return  (m_iPicWidth >> 1); }};// END CLASS DEFINITION TComPicYuvTComPicYuv::TComPicYuv()
{m_apiPicBufY      = NULL;   // Buffer (including margin)m_apiPicBufU      = NULL;m_apiPicBufV      = NULL;
}TComPicYuv::~TComPicYuv()
{
}Bool TComPicYuv::create( Int iPicWidth, Int iPicHeight )
{m_iPicWidth       = iPicWidth;m_iPicHeight      = iPicHeight;m_apiPicBufY      = (Pel*)malloc(m_iPicWidth * m_iPicHeight * sizeof(Pel));m_apiPicBufU      = (Pel*)malloc((m_iPicWidth >>1) * (m_iPicHeight>>1) * sizeof(Pel));m_apiPicBufV      = (Pel*)malloc((m_iPicWidth >>1) * (m_iPicHeight>>1) * sizeof(Pel));return true;
}Void TComPicYuv::destroy()
{if( m_apiPicBufY ){ free( m_apiPicBufY );    m_apiPicBufY = NULL; }if( m_apiPicBufU ){ free( m_apiPicBufU );    m_apiPicBufU = NULL; }if( m_apiPicBufV ){ free( m_apiPicBufV );    m_apiPicBufV = NULL; }}Void TComPicYuv::setYuv(Pel pixelY,Pel pixelU,Pel pixelV)
{if( m_apiPicBufY ){ memset(m_apiPicBufY, pixelY,m_iPicWidth * m_iPicHeight * sizeof(Pel)) ; }if( m_apiPicBufU ){ memset(m_apiPicBufU, pixelU,(m_iPicWidth >>1) * (m_iPicHeight>>1) * sizeof(Pel)) ; }if( m_apiPicBufV ){ memset(m_apiPicBufV, pixelV,(m_iPicWidth >>1) * (m_iPicHeight>>1) * sizeof(Pel)) ; }
}Void TComPicYuv::setPixel(int posX, int posY, int width, Pel pixelY,Pel pixelU,Pel pixelV)
{Pel *Y = m_apiPicBufY + posY*m_iPicWidth+posX;for(int h = 0; h<width; h++){for(int w = 0; w<width;w++){Y[h*m_iPicWidth + w] = pixelY;}}Pel *U = m_apiPicBufU + (posY>>1)*(m_iPicWidth>>1)+(posX>>1);Pel *V = m_apiPicBufV + (posY>>1)*(m_iPicWidth>>1)+(posX>>1);for(int h = 0; h<(width>>1); h++){for(int w = 0; w<(width>>1);w++){U[h*(m_iPicWidth>>1) + w] = pixelU;V[h*(m_iPicWidth>>1) + w] = pixelV;}}
}int main()
{TComPicYuv *frame = new TComPicYuv;TComPicYuv *clourMap = new TComPicYuv;frame->create(8,8);clourMap->create(512,512);FILE *FrameFile = fopen("D:\\clourFrame_8x8.yuv","wb");FILE *clourFile = fopen("D:\\clourMap_512x512.yuv","wb");for(int Y = 0; Y<256; Y++){for(int U = 0; U<256; U++){for(int V = 0; V<256; V++){frame->setYuv((Pel)Y,(Pel)U,(Pel)V);fwrite(frame->getPicBufY(),1,frame->getWidth()*frame->getHeight(),FrameFile);fwrite(frame->getPicBufU(),1,(frame->getWidth()*frame->getHeight())>>2,FrameFile);fwrite(frame->getPicBufV(),1,(frame->getWidth()*frame->getHeight())>>2,FrameFile);int  count = Y*256*256 + U*256 + V;if(count%1000000==0){printf("=");}}}}for(int Y = 0; Y<256; Y++){for(int U = 0; U<256; U++){for(int V = 0; V<256; V++){clourMap->setPixel(U*2,V*2,2,Y,U,V);}}fwrite(clourMap->getPicBufY(),1,clourMap->getWidth()*clourMap->getHeight(),clourFile);fwrite(clourMap->getPicBufU(),1,(clourMap->getWidth()*clourMap->getHeight())>>2,clourFile);fwrite(clourMap->getPicBufV(),1,(clourMap->getWidth()*clourMap->getHeight())>>2,clourFile);printf("*");}fclose(clourFile);fclose(FrameFile);frame->destroy();clourMap->destroy();
}