locate (x,y) coordinates on an image

Hi, I performed image registration of two images using the function cpselect where I selected some points on the fixed and moving images and later transformed them. Any idea on how I can locate the specific points on the moving image which can later be transformed into the fixed imag?

Answer 1

[Matt J]

Assuming the transform type you're using supports it, you would use transformPointsInverse.

https://www.mathworks.com/help/images/ref/affine2d.transformpointsinverse.html

[Anisha Jamil]

Thank you! Is there a way to select points on the fixed image (without using ginput) to transform and find the corresponding coordinates on the moving image?

[Matt J]

You can use datatip() instead of ginput, although youwill have to set SnapToDataVertex appropriately, if you want to be able to select non-integer pixel locations.

https://www.mathworks.com/help/matlab/ref/matlab.graphics.datatip.datatip.html#mw_550d56ae-593f-4cfa-a296-8c176a353ea1