【OpenCV】將單通道的Mat對象轉換為三通道的Mat

http://blog.csdn.net/wx7788250/article/details/70261615

/*************************************************
//  Method:    convertTo3Channels
//  Description: 將單通道圖像轉為三通道圖像
//  Returns:   cv::Mat 
//  Parameter: binImg 單通道圖像對象
*************************************************/
Mat convertTo3Channels(const Mat& binImg)
{
    Mat three_channel = Mat::zeros(binImg.rows,binImg.cols,CV_8UC3);
    vector<Mat> channels;
    for (int i=0;i<3;i++)
    {
        channels.push_back(binImg);
    }
    merge(channels,three_channel);
    return three_channel;
}