YUV值对应的颜色 |
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YUV值对应的颜色
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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 #include #include typedef void Void; typedef bool Bool; typedef int Int; typedef unsigned char UChar; typedef UChar Pel; ///< 16-bit pixel type class 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 picture Int m_iPicHeight; ///< Height of picture public: 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 TComPicYuv TComPicYuv::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; h1)*(m_iPicWidth>>1)+(posX>>1); Pel *V = m_apiPicBufV + (posY>>1)*(m_iPicWidth>>1)+(posX>>1); for(int h = 0; h>1); h++) { for(int w = 0; w>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; YgetWidth()*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; YgetWidth()*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(); } |
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