Comments on: A reason why Photoshop CS4 kicks ass

By: whatever

whatever — Thu, 29 Jan 2009 09:44:04 +0000

Google “Seam Carving” if you’d like to know how it’s done.

By: James

James — Wed, 28 Jan 2009 17:12:19 +0000

There’s nothing obvious in terms of quality loss – I should mention that the screenshot above is pretty poor quality – I forgot to turn on antialiasing in my Photoshop preferences when I did that!

I think there are limits to what it can do when you’re scaling things up or down – my best guess is that it’s working with convolution filters to pick out areas of high contrast and edges, and then scaling portions of the image as it goes.

If your image has got a lot of large artefacts then it’ll preserve them, but it does a pretty fine job of matching blurs around edges.

The only thing I’ve picked up on is the scaling of shades and tones – in the image above you can notice that the sky colours have been squashed in the top picture – it’s preserved the general texture, but with the sky colours being a very similar tone, it hasn’t really picked up on the colour changes and dealt with those.

By: lee

lee — Wed, 28 Jan 2009 16:55:36 +0000

Very coool James, but how does content-aware-scaling look in high-resolution? Any noticeable artifacts, blurs, etc?

By: James

James — Wed, 28 Jan 2009 10:05:05 +0000

You know, I think it is – I grabbed the picture from Google Image search, but was never able to find it again to give some attribution!

I’ll change the ‘some castle’ bit in the post above.

By: Paulius Uza

Paulius Uza — Wed, 28 Jan 2009 09:59:50 +0000

Sorry for the off topic, but is this Trakai Castle in the picture?