RGB转换为灰度图的vc代码

BOOL RGBToGray(BYTE *pData,int iWidth,int iHeight,int iDepth)
{
    BYTE red,green,blue;
    BYTE grey;

    if(iDepth != 3 && iDepth != 4)
    {
        return FALSE;
    }
    
    for(int j=0;j < iHeight;j++)
    {
        for(int i=0;i < iWidth;i++)
        {
            blue = *(pData + j*iWidth*iDepth+i*iDepth);
            green = *(pData + j*iWidth*iDepth+i*iDepth + 1);
            red = *(pData + j*iWidth*iDepth+i*iDepth + 2);

            grey = (BYTE)((float)(red*0.299+green*0.587+blue*0.114));

            *(pData + j*iWidth*iDepth+i*iDepth) = grey;
            *(pData + j*iWidth*iDepth+i*iDepth + 1) = grey;
            *(pData + j*iWidth*iDepth+i*iDepth + 2) = grey;
        }
    }

    return TRUE;
}