Photoshop 'unblur' leaves MAX audience gasping for air • Hacker News Board

Re: Photoshop 'unblur' leaves MAX audience gasping for air

#91

Post by voidpointer » Tue, Oct 11, 2011, 1:25 PM UTC

nknight wrote: post #50

ck2 wrote: post #21

I'm more impressed with that overhead display - seems impossible? How does it disappear at the end - or is that a virtual digital overlay? Wait, is the entire background rear projected, like a borderless movie theater screen? Must be massive resolution ?!

I'm inclined to say much or all of the background is indeed all rear-projected. If you look at the top-right around 5:06 or 5:07, you see what looks a lot like it might be light-emitting text floating in midair. (EDIT: Correction! It's not just floating there, it scrolls left just as the camera is coming down, I missed that on the first viewing. So it's definitely not just on a physical banner.) As for "massive resol…

Yes, it was all projected. (also the side walls of the theatre). Some 20+ projectors pushing 300 million pixels/sec. The intro to the keynotes was pretty amazing as well, meshing the projection with light effects and live performance: http://www.youtube.com/watch?v=VrDPgUjqTQ8&feature=relat...

Re: Photoshop 'unblur' leaves MAX audience gasping for air

#92

Post by vilius » Tue, Oct 11, 2011, 1:51 PM UTC

klodolph wrote: post #13

po wrote: post #3

Does this work with just motion blur or also with aperture blur? It seems like they are calculating the motion of the camera so perhaps just the former.

Defocus (or "aperture blur") cannot be corrected by the methods they mention in the video. However, there are other kinds of blur you can correct.

This is an interesting way of completely avoiding defocus blur: http://www.lytro.com/picture_gallery

Re: Photoshop 'unblur' leaves MAX audience gasping for air

#93

Post by splicer » Tue, Oct 11, 2011, 2:07 PM UTC

TelmoMenezes wrote: post #67

So now we need blurring algorithms that cause actual information loss (I'm sure they already exist, but now there's suddenly a bigger market for them).

Just use content-aware fill in CS5.

Re: Photoshop 'unblur' leaves MAX audience gasping for air

#94

Post by pixcavator » Tue, Oct 11, 2011, 2:10 PM UTC

Here's a relevant image: http://inperc.com/wiki/index.php?title=A_common_view_of_digi....

Re: Photoshop 'unblur' leaves MAX audience gasping for air

#95

Post by dextorious » Tue, Oct 11, 2011, 2:21 PM UTC

My version of Photoshop had that feature for years.

1) Load image. 2) Filter -> Gaussian Blur 3) Undo

;-)

Re: Photoshop 'unblur' leaves MAX audience gasping for air

#96

Post by powertower » Tue, Oct 11, 2011, 3:30 PM UTC

ck2 wrote: post #21

I'm more impressed with that overhead display - seems impossible? How does it disappear at the end - or is that a virtual digital overlay? Wait, is the entire background rear projected, like a borderless movie theater screen? Must be massive resolution ?!

I was thinking the same thing.

Re: Photoshop 'unblur' leaves MAX audience gasping for air

#97

Post by aidenn0 » Tue, Oct 11, 2011, 4:02 PM UTC

bluedanieru wrote: post #58

DavidSJ wrote: post #44

Earlier quoted context omitted.

Being paid to be rude doesn't make it not rude.

He was paid to be rude to the people who were paying him to be rude? That might not make it not rude, but I can't imagine anything that would come closer.

"Look, I CAME HERE FOR AN ARGUMENT, I'm not going to just stand..."

"OH, oh I'm sorry, but this is abuse."

"Oh, I see, well, that explains it."

"Ah yes, you want room 12A, Just along the corridor."

Re: Photoshop 'unblur' leaves MAX audience gasping for air

#98

Post by teuobk » Tue, Oct 11, 2011, 4:05 PM UTC

Geee wrote: post #24

It's called blind deconvolution. Blind means that they have to first estimate the original convolution/blur kernel and in the second phase, apply the deconvolution. If there's acceleration sensor on the camera, you can use data from that for the blur kernel. It's nothing new really, but algorithms for it have advanced tremendously. For example, there's some results from 2009 http://www.youtube.com/watch?v=uqMW3OleLM4…

Indeed, I gave it a go with a blind deconvolution product for the consumer market. In the end, I decided to kill it. Here's my blog post describing why I pulled the plug: http://www.keacher.com/?p=872

Re: Photoshop 'unblur' leaves MAX audience gasping for air

#99

Post by salem » Tue, Oct 11, 2011, 4:15 PM UTC

snikolov wrote: post #33

If you are wondering how they might be doing it, here is one approach that I saw in a computer vision class (no idea if they are doing anything similar to this) (slides: http://cs.nyu.edu/~fergus/presentations/fergus_deblurring.pd... (~60 MB ppt) paper: http://cs.nyu.edu/~fergus/papers/deblur_fergus.pdf (~10 MB pdf) ) The basic idea is that you have an unknown original image and it is convolved with an unknown blurri…

Yes, and it seems that their algorithm needs hints for natural image verses text

Re: Photoshop 'unblur' leaves MAX audience gasping for air

#100

Post by natex » Tue, Oct 11, 2011, 4:37 PM UTC

Imagemagick can already use this "algorithm". See "fourier transform" applications such as:

http://www.fmwconcepts.com/imagemagick/fourier_transforms/fo...)