
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
 LinkBack  Thread Tools  Display Modes 
October 21st, 2016, 12:10 PM  #1 
Newbie Joined: Jun 2009 Posts: 19 Thanks: 1  Creating a camera with minimum distortion?
I'm working on creating different 3D cameras, each camera being a bunch of rays coming out of a single point in certain directions, each ray representing a pixel. Currently I have a common camera setup where all rays are coming from a zero origin point and passing through midpoints of cells on a flat rectangular grid representing computer screen. That creates a lot of distortion at the edges of the screen and I'm looking for a way to improve that. I thought about replacing a flat grid with a hemisphere and cast the rays through equidistantly placed points on it. As far as I understand it is not possible to equally distribute arbitrary number of points on the sphere and I don't want to find these locations numerically unless it's the only way to do it. So I'd like to ask, since the camera surface is a hemisphere, does it change anything or there is no solution for hemisphere as well? Or maybe there are some other ways to create less distorted 2d projection of a 3d virtual space? Thank you! 
October 21st, 2016, 12:34 PM  #2 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,305 Thanks: 2443 Math Focus: Mainly analysis and algebra 
For different distortions you should look to projections used by cartographers, but essentially, the distortion is defined by the shape of the 2d projections I suppose.

October 22nd, 2016, 10:46 AM  #3  
Newbie Joined: Jun 2009 Posts: 19 Thanks: 1  Quote:
So you are saying it is not a mathematical question and I won't get much help here, I need a "cartographers forum"? Or is it in the wrong section on this forum?  
October 22nd, 2016, 11:56 AM  #4 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,305 Thanks: 2443 Math Focus: Mainly analysis and algebra 
I know very little about the topic, perhaps others know more. Certainly there is plenty of mathematics behind projections. My suggestion just seemed to be of practical use.

October 23rd, 2016, 11:05 PM  #5 
Senior Member Joined: Apr 2014 From: UK Posts: 866 Thanks: 315 
If the edges look distorted, I suspect the viewing angle of the image is too large.


Tags 
camera, creating, distortion, minimum 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
How camera work  MMath  Physics  10  July 20th, 2016 01:26 AM 
Label Distortion on a Cylinder  edwardholmes91  Geometry  7  March 3rd, 2016 07:28 AM 
Inverse radial distortion  azkuene  Algebra  3  February 15th, 2012 08:13 PM 
Removal of radial distortion from photographs  spittle  Linear Algebra  0  March 10th, 2011 05:03 AM 