Problem with loading an Image from raw data

Hi everybody,

I'm trying to load an image from raw data, which I get from a database.
For testing purpose I saved the data to a file and wrote the code below but it won't display the image.
I'm not that into processing images, maybe I'm missing something else.

the raw image
an exported version of the image

Code:

---

QByteArray imagesData;
QFile *file = new QFile(QFileDialog::getOpenFileName(this,tr("Open Image"), "", tr("")));
 
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(),4320,2880,QImage::Format_RGB888);
 
        QPixmap pix;
        pix.fromImage(img);
 
        ui->label->setPixmap(pix);
}

---

thanks :)

Well, you are setting an null pixmap on the label, so it will by definition be empty.

You probably didn't see the "static" keyword in the signature of QPixmap::fromImage()

Cheers,
_

I did miss that one out but it is still not working, seems like this isn't correct.

QImage img((const uchar*)imagesData.data(),4320,2880,QImage::Format_ RGB888);

So why aren't you simply calling QPixmap::load() or QPixmap::loadFromData() instead of going through this circuitous route of reading the data, creating a QImage and then converting that to a pixmap?

What I get from the database is a raw dump without a header, so I can't use QPixmap::load() or QPixmap::loadFromData().
The file is avaible in the first post, maybe I'm missing something again.

Are you certain that the raw dump from the database doesn't contain header information? It would seem odd to store an image as a blob but only after stripping off the header. And are you sure the image dimensions are correct? A 4320 x 2880 pixel image with one byte per color channel should be around 37 MB. The rawImage file you posted is only 4 MB.

You are right, the filesize doesn't really fit and I tried to load the raw file but it didn't work.
I really have no idear, it seems like its the jpg file without a header but as I said I'm really not into grafiks.

Or ask the author of these images.