bool YV12ToBGR24_Native(unsigned char* pYUV,unsigned char* pBGR24,int width,int height)

{

    if (width < 1 || height < 1 || pYUV == NULL || pBGR24 == NULL)

        return false;

    const long len = width * height;

    unsigned char* yData = pYUV;

    unsigned char* vData = &yData[len];

    unsigned char* uData = &vData[len >> 2];

    int bgr[3];

    int yIdx,uIdx,vIdx,idx;

    for (int i = 0;i < height;i++){

        for (int j = 0;j < width;j++){

            yIdx = i * width + j;

            vIdx = (i/2) * (width/2) + (j/2);

            uIdx = vIdx;

            bgr[0] = (int)(yData[yIdx] + 1.732446 * (uData[vIdx] - 128));                                    // b分量

            bgr[1] = (int)(yData[yIdx] - 0.698001 * (uData[uIdx] - 128) - 0.703125 * (vData[vIdx] - 128));    // g分量

            bgr[2] = (int)(yData[yIdx] + 1.370705 * (vData[uIdx] - 128));                                    // r分量

            for (int k = 0;k < 3;k++){

                idx = (i * width + j) * 3 + k;

                if(bgr[k] >= 0 && bgr[k] <= 255)

                    pBGR24[idx] = bgr[k];

                else

                    pBGR24[idx] = (bgr[k] < 0)?0:255;

            }

        }

    }

    return true;

}

以上是yv12到RGB24的转换算法，如果是yuv420到RGB24转换，秩序u,v反过来就可以了。

即：

 unsigned char* uData = &yData[nYLen];

 unsigned char* vData = &vData[nYLen>>2];

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注：海康威视网络摄像头一般就是yu12格式的！

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2016-9-22 19:53

张朋艺 pyZhangBIT2010@126.com