Light field photography

Camera equipment and technique for taking photos.
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peter303
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Re: Light field photography

Postby peter303 » Mon Oct 24, 2011 12:36 pm

There are some examples from Stanford online which include the raw images, and synthetic images at arbitrary points of view, DOF, and aperature:
http://lightfield.stanford.edu/lfs.html
This worked in IE but not my Firefox browser.
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Jon Frohlich
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Re: Light field photography

Postby Jon Frohlich » Mon Oct 24, 2011 12:45 pm

peter303 wrote:There are some examples from Stanford online which include the raw images, and synthetic images at arbitrary points of view, DOF, and aperature:
http://lightfield.stanford.edu/lfs.html
This worked in IE but not my Firefox browser.


Not really the same thing.

http://lightfield.stanford.edu/acq.html

I don't think the Lytro version has the same capabilities as the rig they used to capture these images.
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Re: Light field photography

Postby Bean » Mon Oct 24, 2011 12:51 pm

JayMiller wrote:
Bean wrote
You can set DOF in post
.

Could you tell me where you found the information? I have checked their website and blog carefully and have only found references to focus and being able to switch beween 2D and 3D. Nothing about Depth of Field. Depth of Field would be a game changer.

It's the entire point of the technology. It captures all the visible light, the DOF shown in the online images is purely a function of post-processing settings. It may or may not be available at this time but that's purely a software limitation, not hardware.
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Re: Light field photography

Postby Bean » Mon Oct 24, 2011 12:53 pm

Jon Frohlich wrote:Not really the same thing.

http://lightfield.stanford.edu/acq.html

I don't think the Lytro version has the same capabilities as the rig they used to capture these images.

http://en.wikipedia.org/wiki/Proof_of_concept
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Re: Light field photography

Postby peter303 » Mon Oct 24, 2011 12:55 pm

Jon Frohlich wrote:http://lightfield.stanford.edu/acq.html
I don't think the Lytro version has the same capabilities as the rig they used to capture these images.

As I said in my verbose earlier post this can now be implemented in a single camera with a clever lens system.
The one I saw replaces the main lens with a grid of bead lenses.
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Re: Light field photography

Postby JayMiller » Mon Oct 24, 2011 1:13 pm

JayMiller wrote:
Bean wrote
You can set DOF in post
.
Jay wrote: Could you tell me where you found the information? I have checked their website and blog carefully and have only found references to focus and being able to switch beween 2D and 3D. Nothing about Depth of Field. Depth of Field would be a game changer.

Bean wrote: It's the entire point of the technology. It captures all the visible light, the DOF shown in the online images is purely a function of post-processing settings. It may or may not be available at this time but that's purely a software limitation, not hardware.

It may be a problem with software (i'm not convinced of that), the fact remains that apparently you can't currently change DoF with the Lytro and the Lytro is what is under discussion.
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Re: Light field photography

Postby Jon Frohlich » Mon Oct 24, 2011 1:22 pm



I'm impressed. You found a wiki link. I'm familiar with the term.
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Re: Light field photography

Postby Bean » Mon Oct 24, 2011 1:37 pm

Jon Frohlich wrote:I'm impressed. You found a wiki link. I'm familiar with the term.

So where's the confusion? The Lytro essentially takes the large array and puts it in a small form factor with some lens trickery.

JayMiller wrote:It may be a problem with software (i'm not convinced of that), the fact remains that apparently you can't currently change DoF with the Lytro and the Lytro is what is under discussion.

Not having actually used the software, I don't think either of us are qualified to make any definitive statements about the Lytro. In doing some reading, it seems that the DOF adjustment has been demonstrated in the past by the people who are making the Lytro (in a lab setting). I doubt that such functionality would be left out of the provided software package; if it has been, that's a crying shame because no one in history has ever made a 3rd party image processing program independent of a camera manufacturer.
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Re: Light field photography

Postby Jon Frohlich » Mon Oct 24, 2011 1:48 pm

Bean wrote:
Jon Frohlich wrote:I'm impressed. You found a wiki link. I'm familiar with the term.

So where's the confusion? The Lytro essentially takes the large array and puts it in a small form factor with some lens trickery.


There's no confusion. I'm criticizing the product they are selling commercially. They aren't marketing this as a POC.
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Re: Light field photography

Postby roguejackalope » Mon Oct 24, 2011 1:56 pm

Jon Frohlich wrote:
Bean wrote:
Jon Frohlich wrote:I'm impressed. You found a wiki link. I'm familiar with the term.

So where's the confusion? The Lytro essentially takes the large array and puts it in a small form factor with some lens trickery.


There's no confusion. I'm criticizing the product they are selling commercially. They aren't marketing this as a POC.

No, they're not. But it's just version 1.0.

It's a cool technology, and it's pretty exciting to imagine what it could mean for the future of photography. Thanks for sharing.
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Re: Light field photography

Postby Bean » Mon Oct 24, 2011 2:10 pm

Jon Frohlich wrote:There's no confusion. I'm criticizing the product they are selling commercially. They aren't marketing this as a POC.

Can you be specific about what feature or lack thereof you're criticizing?

Edit: I just went and played with the Stanford samples a bit more and I'm making a guess (which could be wrong - let me know if it is) that your criticism is an inability to perform a parallax shift. This gif was made from a single shot from a Lytro. It appears to not be a feature currently supported in the software, but it demonstrates that the hardware is capable.

Image
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Re: Light field photography

Postby Jon Frohlich » Mon Oct 24, 2011 2:37 pm

Bean wrote:
Jon Frohlich wrote:There's no confusion. I'm criticizing the product they are selling commercially. They aren't marketing this as a POC.

Can you be specific about what feature or lack thereof you're criticizing?


1) Terrible form factor and ergonomic design
2) Touchscreen only and tiny LCD (I personally hate this in a camera)
3) As far as I can tell little in the way of shutter speed control or manual control of any kind (no mention of max/min shutter speeds at all)
4) No ability to expand memory (no SD card slot)
5) No flash
6) No mention of metering modes and how it exposes a scene
7) No mention of what they mean by HD quality but if the examples are any indication your resulting image is very low-res

I could go on and on.

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