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Bokeh DOF

category: code [glöplog]
Would be pretty cool if modern cameras came equipped with realtime post processing capabilities.

If you count smartphones as cameras (I do - a decent smartphone has a high enough quality camera these days to replace an average point & shoot) then they've had realtime post-processing for a while. I actually write camera software with realtime processing :)
added on the 2012-01-09 12:32:17 by psonice psonice
Would be pretty cool if modern cameras came equipped with realtime post processing capabilities.

added on the 2012-01-09 12:34:37 by smash smash
that lytro camera was a huge disappointment once i read how it works :(
added on the 2012-01-09 12:55:13 by psonice psonice
psonice: not to mention its but-ugliness...
added on the 2012-01-09 13:00:19 by ara ara
psonice: they STILL claim they can do perspective shifting on their camera.

From their web page:

About Living Pictures

The way we communicate visually is evolving rapidly, and people's expectations are changing in lockstep. Light field cameras offer astonishing capabilities. They allow both the picture taker and the viewer to focus pictures after they're snapped, shift their perspective of the scene, and even switch seamlessly between 2D and 3D views. With these amazing capabilities, pictures become immersive, interactive visual stories that were never before possible – they become living pictures.

added on the 2012-01-09 15:18:38 by Jcl Jcl
I guess that with what they've done they can get a rudimentary depth map for the photo with a bit of contrast detection or something on each of the sub-images. If you map the photo onto that as a height map you *can* do perspective shifting.

Of course it's very fake, and the range of movement before it starts looking very fake is extremely tight, but 1º of shifting that looks ok in a few specially selected scenes is enough for the marketing department ;)
added on the 2012-01-09 15:34:49 by psonice psonice
psonice: very little is enough for a stereoscopic efect.
added on the 2012-01-09 21:50:06 by xernobyl xernobyl
true, but it's still 3d from a 2d photo. They have a bit more data to generate the depth map from, that's all.
added on the 2012-01-09 22:19:06 by psonice psonice
From my knowledge you can view Lytro's RAW data as a few photograps from points on the same plane separated by tenths of milimeters.
added on the 2012-01-10 02:15:14 by xernobyl xernobyl
I thought they were just taking the same photo from the same location but with different focus distance?
added on the 2012-01-10 02:53:54 by psonice psonice
Imagine a CCD (pixel array), and every N x M pixels have a lens of it's own, that way for a given world space point they can capture light coming from a few directions, not just the accumulated light.
added on the 2012-01-10 03:20:32 by xernobyl xernobyl
That explanation obviously misses somthing very important like where those tiny lenses are focused... better google it ;)
added on the 2012-01-10 03:22:19 by xernobyl xernobyl
yeah, that's about the description I read originally. But then later the story seemed to change, and it was rapidly taking several exposures at different focus distances.

If it's doing what you say, then it's kind of impressive but practically useless unless they have some really good super-resolution stuff upscaling the image (I seem to recall the resolution being just 512x512 or something). If it's the later story about it doing differently focused exposures, this is something pretty much any camera can do with a little software massaging.
added on the 2012-01-10 11:13:14 by psonice psonice
I love the Lytro demo video where the guy goes on about the social sharing aspects: "..and my friends can zoom in, zoom out, refocus and all the rest of the great things a Lytro camera enables you to do..."

What "all the rest"? Zooming and refocusing -- that's it. :)
added on the 2012-01-10 14:02:22 by gloom gloom
all the rest of the great things

This probably means one can add a new dimension to home porn. You know, allowing to concentrate on 'that beautiful vase in the background' instead.
added on the 2012-01-10 15:07:14 by el-bee el-bee
"my friends can fuck around with the shot i spent so much time on"
added on the 2012-01-10 15:09:21 by Gargaj Gargaj
Given that the refocusing beyond your initial photo fixing is pure gimmick (and once again heavily fake when they're online - it's just 3 photos crossfaded) that leaves us with the amazing ability to zoom into a low-res photo :D
added on the 2012-01-10 15:09:45 by psonice psonice
8x zoom at a constant f/2.0! That's what really makes me suspicious. Even if your zoom range starts at (equivalent) 24mm (and that's a pretty fucking awesome wide lens for a compact camera), you get 192mm at f/2.0! At 192mm f/2.8 would be excelent already, let alone f/2.0... although it would be a bitch to focus.
added on the 2012-01-10 17:29:33 by xernobyl xernobyl


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