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Scaling and rotating the image by selecting three known reference point in image

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Saroj Poudyal
Saroj Poudyal 2021-8-16
编辑： Matt J 2021-8-16
I have a image with lithography alignment mark on them. The distance between the mark is 200 micro meter and two alignment mark are in straight line. While taking image in microscope the image gets little rotated and the distace between the markers is in pixels. I want to write a program where I will upload the image, select three markers, assign coordinate to them and the program should return me with the scaled and roated image such that distance between marker is 200 micro meter and these markers are in straight line.
I know how to read, rotate and scale but the I am facing problem in asigning cordinate to referece points.

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回答（1 个）

Matt J
Matt J 2021-8-16
You could use drawpoint() or drawcrosshair(). This will return an object containing the position coordinates of the selected point.
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Matt J
Matt J 2021-8-16
编辑：Matt J 2021-8-16
I don't recommend ginput, since that will not give you the option of refining the position of the selected locations, as in the following:
obj=drawpoint;
wait(obj) %%double-click on the point to proceed from here.
coordinates=obj.Position,
delete(obj)

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