QImage to QPixmap where should I add scale() If I want to set to QLable

[darrenleeleelee1]

@mrjj no, It's(2235, 3408)

[mrjj]

@darrenleeleelee1

ok.

what are
photo.width() and self.photo.height()

[darrenleeleelee1]

@mrjj (512, 512)

[mrjj]

@darrenleeleelee1

Hi
I tried with the same sizes as you, found image at (2235, 3408) also

So not why you always seems to see the same.

What Qt version are you using ?

[darrenleeleelee1]

@mrjj

You use scale for QImage not QPixmap?

[mrjj]

@darrenleeleelee1

Hi
Yes.

{
    qimage = qimage.scaled(ui->label->width(),ui->label->height(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
    auto pixmap = QPixmap::fromImage(qimage);
    ui->label->setPixmap(pixmap);
    }

[darrenleeleelee1]

@mrjj What is the different if I am scale to QPixmap

[mrjj]

@darrenleeleelee1

Hi
as far as I know, nothing.
Both return a scaled copy.

I cant see anything wrong with the code you shown. So unless its a bug in 5.9.7
i really have no idea why the images look the same to you.

Also, you scale it down a lot so there should always be an effect.

[darrenleeleelee1]

@mrjj OK, thanks, I found I was not put two Image together like you do.And I miss the change.Thanks you alot.Sorry bother you.

[mrjj]

@darrenleeleelee1

ahh. Well that explains why they look so much the same :)
No worries, its no bother at all.