Is it just me or does it look like the unscrambling was going really well, but they decided to knock off early the day the pics were due?

"Finished that picture descrambling yet Smith?"

"Er, yes here you go"...

It's still good enough to easily recognize the guy, if you knew him.

The poor quality is as much likely due to poor quality originals as to poor workmanship, if these images have been resized, changed formats, size, resolution, and so on over the years. I'm just a bit startled that they took so long to get around to this - It seems an obvious step to me.

If you rotate pixels about a central point, the chances of a rotated pixel being moved to the exact location of another pixel are extremely small - unless the rotation is by a multiple of 90 degrees.

Once the pixels are rotated, they then have to be "averaged" - a pixel of the final image may contain contributions from up to 9 rotated pixels. You can see that the effect is more marked nearer the centre of the image - because there are fewer pixels to contain the information at tighter radii.

The left eye has survived so well because it's a circular feature at the centre of rotation. The face also looks quite clear because a large circular ring around the eye is mostly skin tone - distortion is visible but the human mind's ability to directly identify faces and facial features makes it relatively unimportant. The "swirler" would have been better advised to choose a different, asymmetrical point of rotation.

This sort of image manipulation is seriously lossy. As such I am very impressed at the amount of detail that has been recovered. I just tried swirling and unswirling a picture of my son - with much the same results.

'The disease has turned him inside out so that he now wears his soul on his face'

Choderlos de Laclos - Les Liaisons Dangereuses

Hopefully, when he's eventually caught, the lags at the place where he gets "detained" will take the opportunity to re-arrage his face to match that of the "swirly" picture! >:o)

...and a suitable large hammer.

Or has Interpol's site been down all day?

just make a grid of colours that are all unique and then run it *forwards* through the swirl filter, then theyd know exactly what colour ended up where, and how much it had changed from its original value, and that would make it very easy to run a different image *backwards* through the filter.

i remember a british university did that to one of the damaged space telescopes a few years back so they could retrieve clear images without sending someone up to fix the lens. cant remember the details though.?

unless my ex roomie has been using hair regrowth stuff and it actually worked... this guy isn't it. but dang scary resemblance. (I think the chin structure is different too)

*shivers*

Unless the guy has a very low IQ (which in one respect is very likely, but in another - the fact that he apparently travels the world, knows how to manage a web-site etc - would suggest otherwise) why on Earth would he want to publish his face in any way, shape or form? Surely it would have been easier and safer to just put a big black blob over his face? So - either he's taunting those who are trying to catch him, or he's trying to give himself up in a strange, perverted sort-of way. Which is quite fitting.

I'm with Andy, by the way. Well, I'm not with him physically, you understand. I just mean I agree with him...

If I remember correctly, both Vietnam and Cambodia have large full page visas that you have to apply for in advance - with a couple of passport size photos.

So, erm, couldn't they just look through all the photo's?

I know racial and gender stereotyping is bad and we'd never consider doing such a thing in the UK, but they could probably start with the visa photos from white men - should cut it down a touch.

After working for one company which did image processing expected to end up in court, you have to be *VERY* careful about the chain of evidence and how your operations provide opportunities for the defence lawyers.

In this case, I could see them being able to justify a purely algorithmic unswirling but being on legally shaky ground if anyone were to "touch up" the photo to make it a little more intelligible.

To those that go "c'mon it's not that hard", you do it yourselves and show us.

I think they did a real good job here :o

Now that they have a face to look for, it's most certainly what they are doing.

Or did you expect them to go looking for a swirlie ?

Say they do catch him based on the photo, would that actually be allowed as evidence as it has technically been 'tampered'?

... replace the image of my face with someone else's, before swirling, next time I distribute photos of myself commiting a serious crime.