Author Topic: Take picture first , focus later. (Read 1076 times)

asterinex · « **on:** June 22, 2011, 05:29:13 AM »

the Lytro camera which lets you take pictures without focusing....
http://gizmodo.com/5814337/lytro-is-a-focus+free-camera-that-will-change-how-you-take-pictures

Em5 Pete · « **Reply #1 on:** June 22, 2011, 08:12:36 AM »

I couldn't open the Video or image.. But, that sounds really cool man

You adjust the Focal point in editing and I guess DOF also...

Who needs f/stops now...

lisandra · « **Reply #2 on:** June 22, 2011, 11:19:54 AM »

I read about this when it was announced, its called computational photography. It's a baby still.

adash · « **Reply #3 on:** June 22, 2011, 11:22:13 AM »

But see, the image seems to contain more data than just what we see.
Could this also be used to increase high-ISO with, say, 10 stops?

ratobuhler · « **Reply #4 on:** June 22, 2011, 11:29:01 AM »

Fascinating! Apparently this is recording a wave front interference pattern, a hologram in effect. The scene can be recreated using the record as a diffraction grating and let it interfere with un-diffracted light from the same source. This was done on film. I can't envision how to do it digitally other than mathematically processing the digital info. Interested to follow up on this.

lisandra · « **Reply #5 on:** June 22, 2011, 11:35:36 AM »

Asked my self something similar and got an insanely complex answer. Apparently, ISO won't matter in computational photography, the why is what I don't get. I think its all hype, and in the end this is.gonna be nothing more than fancy software at work. It simply sounds too good to be true.

ratobuhler · « **Reply #6 on:** June 22, 2011, 11:48:04 AM »

It seems to be a digital holographic camera. We could do this on film for decades already. In a real hologram you can focus your eyes on any point you choose. If the model is re-created on your computer screen you will have to tell the computer where to focus.

ratobuhler · « **Reply #7 on:** June 23, 2011, 08:13:49 AM »

It turns out that these guys are right here in Silicon Valley. Here is the Dissertation and additional info. It involves a micro-lens array placed in front of the sensor to record directional information (Remember the stereo postcards. They used an array of cylinder lenses) The resolution is determined by the number of micro-lenses and is substantially less that the sensor's capability.

http://www.lytro.com/renng-thesis.pdf

http://www.lytro.com/science_inside

cosinaphile · « **Reply #8 on:** June 23, 2011, 09:00:23 AM »

Quote from: lisandra on June 22, 2011, 11:35:36 AM

Asked my self something similar and got an insanely complex answer. Apparently, ISO won't matter in computational photography, the why is what I don't get. I think its all hype, and in the end this is.gonna be nothing more than fancy software at work. It simply sounds too good to be true.

some experts are of that opinion too

Take picture first , focus later.