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March 17th, 2011, 03:22 AM  #1 
Newbie Joined: Mar 2011 Posts: 2 Thanks: 0  Augmented reality rotation & zoom
I'm working on augmented reality engine and I have a following problem. I'm tracking a 2D rectangle tracking picture inside an other picture (webcam stream). I have detected all four 2D corner coordinates for that tracking picture. Now I need to calculate from the corner coordinates how the original tracker picture has rotated (x,y,zrotations) and zoomed. Bare in mind that the coordinates doesn't create right angle quadrilateral. Any ideas how I can do it? Thanks for any advice. 
March 17th, 2011, 06:42 AM  #2 
Senior Member Joined: Apr 2007 Posts: 2,140 Thanks: 0 
If this is a geometry problem, could you find a mathematics picture by Google?

March 17th, 2011, 11:30 PM  #3 
Newbie Joined: Mar 2011 Posts: 2 Thanks: 0  Re: Augmented reality rotation & zoom
Here is a picture that hopefully helps to understand Here is rectangular picture rotated in x,y and zaxels. Now I need to calculate how much it has rotated. 
March 18th, 2011, 01:10 AM  #4 
Senior Member Joined: Apr 2007 Posts: 2,140 Thanks: 0 
Point A (x, y) ? (x + k, y  k) and for point B (x, y) ? (x + k, y) and for point C (x, y) ? (x, y) and for point D (x, y) ? (x, y  k), where k > 0.


Tags 
augmented, reality, rotation, zoom 
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