3 votes
Accepted

Would it be possible to reconstruct 3d trajectory of ball projectile using only monocular video

I guess this is what Olli implies: Using a lens distortion matrix if necessary, the center of the ball in the picture gives you an elevation and azimuth of your ball relative to the focal point of ...
Marcus Müller's user avatar
2 votes
Accepted

Derivation of range migration algorithm

So if you continue the substitution you get: $R_t = \sqrt{((-R_BK_X/\sqrt{(K_R^2 - K_X^2)} + X_t - X_t)^2 + R_B^2)} $ $R_t = \sqrt{((-R_BK_X/\sqrt{(K_R^2 - K_X^2)} )^2 + R_B^2)} $ $R_t = \sqrt{(R_B^...
Irreducible's user avatar
1 vote
Accepted

Understanding difference in rotation and translation

Homography has an interpretation as a change of perspective or movement of the "camera". I think your example casually refers to the apparent "rotation" of the camera in the ...
Mundo's user avatar
  • 171
1 vote
Accepted

Computer Vision - Does implementation of Hough Transform for lines require a loop for angle parameter?

In real world implementations, is the line: for theta = [theta_min to theta_max ] required? . . . Since we apply Canny edge detector to an image, prior to Hough Transform, we can obtain angle of ...
A_A's user avatar
  • 10.7k
1 vote

Are there analogues to orthogonal transformations in non-orientable surfaces?

Bear with me, as this is really only tangential┬╣ to my area of expertise, but: Maybe the question is not how to extend wavelets to work on non-orientable surfaces, but to interpret said surface as ...
Marcus Müller's user avatar
1 vote

How to triangulate 2 sources on a 2d plane formed by 4 sensors?

Conceptual partial answer: You can use 3 mics to find position in 3D space, except you can't tell if it's above the plane or below the plane (unless you already know there's nothing above the plane, ...
endolith's user avatar
  • 15.8k
1 vote
Accepted

Subsampling property of wavelet transform

I am not completely confident with the full theory of wavelet frames, however I will share some pointers and my beliefs, do not take any of the following for a truth. The property you show is (partly)...
Laurent Duval's user avatar
1 vote
Accepted

Algorithm to effectively find perspective transform in motion estimation

Assumptions From your question, I assume you already have an algorithm that does produce the transformation you want, but you have to play with the parameters manually. Proposed solution First, ...
M529's user avatar
  • 1,736
1 vote

3D point cloud to 2.5D graycale image (metric) [Halcon?]

Your 3 channels already give you the 3D coordinates, and from that 3 images, you already know which pixels locations the 3D data are projected. So you don't need to do anything. If you like to get a ...
Tolga Birdal's user avatar
  • 5,465

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