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Questions tagged [computational-photography]

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15
votes
5answers
3k views

What is the advantage of carrying a tripod and ND-filters when you could use image stacking instead?

From my understanding, if you want to take a long exposure of a landscape shot like the picture below, you have two options: Carry a heavy tripod everywhere you hike and then use a series of ...
5
votes
1answer
75 views

In an image with camera shake and a point light source, can the shape of the point light source be used to practically reduce the shake significantly?

Often said "you could compute out the camera shake if you knew the blur function"... One area frequently plagued by shake: Night photography. One thing frequently found in night photography: Stars ...
0
votes
1answer
55 views

Camera intrinsics from panoramic cutouts

I have a large database of streetside panoramic images (similar to google maps). Each image is a stitched panorama. I convert this panorama from equirectangular to a cubic projection and obtain six ...
0
votes
1answer
113 views

What photo characteristics work best with facial recognition software?

I have teams that are doing surveys and taking photos of respondents (in and around their homes, often outside) with permission to take and use these photos for facial recognition. We're complying ...
3
votes
1answer
424 views

How does refocusing in a dual lens work?

HTC One (M8) and the recent Huawei P9 offer dual lenses. This allows the option of refocussing after the picture has been clicked. Could someone explain how does that happen? How does the software ...
4
votes
4answers
351 views

Term for increasing detail with multiple exposures?

Is there a term for photography that creates an image with additional detail coming from multiple "exposures" (e.g., images) of the same scene? I'm aiming for what is essentially a subset of ...
1
vote
1answer
461 views

Is the relationship between object distance and magnification highly dependent on the camera used?

I'm using a cell phone to capture an image of two objects (O1 and O2) on a flat plane and my camera is level with respect to this plane (the phone and the plane are both parallel). One of these ...
2
votes
2answers
794 views

What should I do with negative values when computing sRGB colors from spectra?

This question is from the computational side of things. Maybe some of you computational photography folks can help me out. If I have a normalized CIE XYZ tristimulus vector like this one: (x, y, z) ...
5
votes
2answers
2k views

How is the spectral response of a camera typically measured?

I cannot find any resources that detail a standardized method of measuring the spectral response of a camera. Does such a standard exist? Does anyone know how to do this? To give some context, I'm ...
6
votes
1answer
890 views

Is there reference code for implementing light field photography?

Many of us here at photo SE have read about light field photography and related cameras from Lytro and Raytrix. A few of the advantages it allows are post-capture software focus, scene perspective ...
21
votes
2answers
1k views

What are the basic workings of the Lytro light-field camera?

lytro.com describes their new light field camera as being able to capture the entire light field, rather than just one plane of light, thereby allowing for a whole new set of post-processing ...