三.代码

/**

 * @brief Mat2QImage Convert the cv::Mat to QImage while the cv::Mat is in BGR

 *                   color space or gray.

 * @param InputMat   The mat used to be converted.

 * @return           The QImage which deep copy the data of the cv::Mat.

 *

 * @author sheng

 * @date   2015-03-31

 * @version 0.1

 *

 * @history

 *     <author>       <date>         <version>        <description>

 *      sheng        2015-03-31         0.1        build the function

 *

 */

QImage Mat2QImage(const cv::Mat& InputMat)

{

    cv::Mat TmpMat;


    // convert the color space to RGB

    if (InputMat.channels() == 1)

    {

        cv::cvtColor(InputMat, TmpMat, CV_GRAY2RGB);

    }

    else

    {

        cv::cvtColor(InputMat, TmpMat, CV_BGR2RGB);

    }


    // construct the QImage using the data of the mat, while do not copy the data

    QImage Result = QImage((const uchar*)(TmpMat.data), TmpMat.cols, TmpMat.rows,

                           QImage::Format_RGB888);



    // deep copy the data from mat to QImage

    Result.bits();


    return Result;


}