CODEWITHSUNDEEP
c++qtimage-resizingqimageqpixmap
James Seva
James Seva

Reputation: 139

Qt resize image with best quality

Can anyone help me resize an image in qt without making the image pixelated. Here's my code. the result is not as good as the original quality..thanks...

QImage img(name);
QPixmap pixmap;
pixmap = pixmap.fromImage(img.scaled(width,height,Qt::IgnoreAspectRatio,Qt::FastTransformation));
QFile file(folder+"/"+name);
file.open(QIODevice::WriteOnly);
pixmap.save(&file, "jpeg",100);
file.close();

Upvotes: 13

Views: 16689

Answers (1)

Nejat
Nejat

Reputation: 32645

You have to pass Qt::SmoothTransformation transformation mode to the scaled function like:

QImage img(name);
QPixmap pixmap;
pixmap = pixmap.fromImage(img.scaled(width,height,Qt::IgnoreAspectRatio,Qt::SmoothTransformation));
QFile file(folder+"/"+name);
file.open(QIODevice::WriteOnly);
pixmap.save(&file, "jpeg",100);
file.close();

Upvotes: 25

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