Polar coordinates of image.
2 views (last 30 days)
Show older comments
So i have used the cart2pol() function to obtain the polar coordinates represented by and θ. In a paper I'm analysing, it is said that the image function, will be multiplied with a matrix.
Is it possible to use in Matlab instead of the normal ?
0 Comments
Answers (2)
Jackson Burns
on 7 Sep 2019
4 Comments
Walter Roberson
on 7 Sep 2019
You will probably find that is a function that produces and coordinate pairs, and that the rotation matrix operates on those to produce and coordinate pairs
Rotation matrices can also be created in terms of polar coordinates
[r(:), theta(:), zeros(numel(r),1)] * [1 0 0; 0 1 dtheta; 0 0 1]
which would increate theta -> theta+dtheta ... though for that simple case it would typically be easier to just do theta = theta + dtheta
Walter Roberson
on 7 Sep 2019
If what you have is a formula in terms of x and y, and you need to convert it to polar, and you have the symbolic toolbox, then use
syms r theta
polar_formula = simplify( subs(YourFormula, {x, y}, {r*cos(theta), r*sin(theta)}) )
See Also
Categories
Find more on Resizing and Reshaping Matrices 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!