Question on 2D projective transformation
2 views (last 30 days)
Show older comments
The help page on Matrix Representation of geometric tranformations, under 2D projective transformations states that in the transformation matrix
[1 0 E; 0 1 F; 0 0 1]
That E and F influence the vanishing point. These seem to emulate rotating the image around the x or y axis if this were a 3D object being rotated. So if I take an image of a dot grid, e.g.
And I perform the following
t = [1 0 .002; 0 1 0; 0 0 1]
tform = projective2d(t);
outImg = imwarp(im,tform);
I get this image as a result
So if my x axis were left/right and y axis up/down this seems to rotate around the y axis. I would like to control the angle of rotation, what exactly does .002 represent here? What I'd like to do is simulate rotating this image, say 3 degrees around the y axis.
2 Comments
Meriem Chetmi
on 21 Sep 2021
Hello,
did you maybe find the relation between the rotation angles and these E , F parameters? I'm facing the same problem
Thank you
Answers (0)
See Also
Categories
Find more on Geometric Transformation and Image Registration in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!