Tagged Questions
1
vote
1answer
33 views
Photo of reflection in magnifying mirror shows normal magnification. Why?
I just took a picture of myself in one of those magnifying shaving mirrors and in the photo I am unmagnified! Why is this?
7
votes
3answers
123 views
Put a sensor at the focal length, behind, or in front?
My intuition tell me that at the focal length a convex lens all the light converges to a point. Following that logic, it would make sense to me that a camera chip would either need to go slightly in ...
2
votes
1answer
122 views
Peak deconvolution [closed]
I need some help understanding how much information I can pull out of this data. I have a sample made up of two materials. Materials A and material B. Then I took a picture of the sample.
The two ...
0
votes
1answer
692 views
How do Anamorphic images work? [closed]
I found the following anamorphic image on this site
Can anyone explain the physics behind the working of such images? Can we create our own anamorphic images? If so how?
Thanks in advance.
2
votes
1answer
146 views
Curved lines in a picture (Photography)
My problem is when I take a picture (a close one) the straight edge looks a little curved. In a standard camera, like a CyberShot.
I would like to know if there is some relationship between the ...
0
votes
1answer
68 views
How to determine the angle a camera has to be at to image a desired scene, given the camera parameters?
Reviewing old material I learned years ago, having a hard time rewrapping my head around the relationships in capturing images from a camera.
Imagine a scenario with the camera placed on the ground ...
1
vote
1answer
116 views
How does the focal length of the lens change the distance from the camera to an object?
I am reviewing some old image processing notes and have the following problem:
I have a camera with a projection plane of $2cm\ by\ 2cm$ and a $15mm$
lens. If you want an $1.5m$ object to take ...
2
votes
1answer
558 views
How to determine the field of view for a pinhole camera with given parameters?
I am reviewing some old material I learned years ago and am having trouble figuring this one out. Can somebody confirm that I have done my math correctly, and tell me how I can recover the field of ...
3
votes
2answers
307 views
why isn't the variance of Fano noise proportional to the number of photon arrivals?
I've been reading "Photon Transfer" by James Janesick and in Chapter 3 (http://spie.org/samples/PM170.pdf) he describes the various sources of noise in a CCD. Basically, incoming photons interact with ...
2
votes
1answer
219 views
How to determine the required resolution to view an image at a certain size?
If I have several camera specifics, can I determine the required resolution to view an image at the size I want?
For example, let's say I want a picture of a square painting to be at least ...
4
votes
4answers
548 views
Optical explanation of images of stars?
Very often when viewing pictures of the cosmos taken by telescopes, one can observe that larger/brighter stars do not appear precisely as points/circles on the image. Indeed, the brighter the light ...
