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Flipping image coordinates to cartesian coordinates

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Jane
Jane 2013-11-19
回答： Image Analyst 2013-11-19
I am new to mablab. I have an image (the size is mxnx3) with a few human-selected points on the image. For example:
p1 = [267,79];
p2 = [96,372];
These points are image coordinates with (1,1) at the top left. I'm trying to convert this to cartesian coordinates with (0,0) on the bottom left. How can I do this? Thanks in advance!

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Image Analyst
Image Analyst 2013-11-19
Try
set(gca,'YDir','reverse')
or
set(gca,'YDir','normal')
until things work the way you want.

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