OpenCV , Mat image from QByteArray

Hi all :),

I'm trying to show an image with opencv function cv::imshow("windowsName",cv::Mat) starting from QByteArray. The problem is that the image appears duplicated:

Like this:
Attachment 10983

Here the code:

Code:

---

void Locus::getImages(QFile* file, Mat& matImg)
{
    QByteArray imagesData;
 
    if(file->exists())
    {
        //get byteArray from raw data file
        file->open(QFile::ReadOnly);
        imagesData = file->readAll();
        file->close();
 
        //Create qimage
        QImage img((const uchar*)imagesData.data(),WIDTH,HEIGHT,QImage::Format_RGB16);
 
        //create mat image from qimage
        matImg = this->qImage2Mat(img);
 
        imshow("window",matImg);
        waitKey();
    }
}
 
Mat Locus::qImage2Mat(const QImage& src)
{
 
    Mat tmp(src.height(),src.width(), CV_8UC3,(uchar*)src.bits(),src.bytesPerLine());
    Mat res;
    cvtColor(tmp, res,CV_RGB2GRAY);
    return res;
}

---

Any help?
ps: i think the problem is the image format, but i've tried many ways help me xD.

The problem was the format, it's not CV_8UC3 but CV_16UC1(16 bit - 1 channel ).
This is just my case ,for this specific problem , but when you work on image processing you must keep in your mind that the format convertions are very important.

You can create a Mat image directly from QByteArray without the need of creating a QImage

Mat img = Mat(WIDTH,HEIGHT, CV_8UC1, imagesData.data());

Regards