S1 and S2 - Two sensor positions.C1 and C2 - Cones of two real points whose focused images are P1 and P2 respectively.
L - Lens.
L - Lens.
To solve for a cone, one needs the base diameter and the height, if it is right circular. But for points away from the optical axis the cone is no longer right circular, so in order to solve for it, one needs to know it at two cross sections. Joining these two at all points around it would give you the cones, as shown above. If one can solve this for all points on the sensor, you can then control the focus point through software, post capture. But there is a problem.
C3 - Newly introduced cone.
3 comments:
Thankyou for this blog, thisis one of the best tutorials on computer vision i have seen
hi,
I was going thorugh the pdf you posted. I had a doubt and would be extremly thankful for any help regarding the same.
This is regarding the circle rectangle image on page 12. From the two images i am able to conclude that the circle and rectangle are not at same depth. But i doubt that it can be concluded that circle is in front of rectangle.
At first sight i saw the cricle was in front of rectangle but i felt that was because i had read this line
"I have created a simple stereogram here in which the circle appears to be
in front of the rectangle when viewed stereoscopically"
After all the sizes of circle and rectangle are same in both images, and the distance is symmetrical you go from circle to rectangle or rectanlge to circle. To test the same i told a friend that circle was behind the rectangle and he sees it the same way. Am i missing something???
Have given an explanation to your doubt as a separate post Computer Vision (40): Let me know if it is clear.
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