locate (x,y) coordinates on an image

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Anisha Jamil 2021-6-27

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https://ww2.mathworks.cn/matlabcentral/answers/866640-locate-x-y-coordinates-on-an-image

编辑： Anisha Jamil 2021-6-28

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?

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Answer 1

Matt J 2021-6-28

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

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

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Anisha Jamil 2021-6-28

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 2021-6-28

编辑：Matt J 2021-6-28

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

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