Using ginput with imshow: how to save pixel instead of axis coordinates

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Corymbiamaculata
Corymbiamaculata 2019-3-11
评论： Corymbiamaculata 2019-3-12
I'm trying to save coordinates of several points in an image (displayed with imshow) as a new variable, and then run some calculations on the selected pixels based on their coordinates. For some reason my coordinates are not saved as integers but doubles. I tried setting axis limits to [0 x 0 y] where x,y is my pixel resolution, but it doesn't work. Is there any way to save pixel XY instead of current axis coordinates? Thanks in advance for help!

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Bjorn Gustavsson
Bjorn Gustavsson 2019-3-11
Not directly from ginput. You can easily do whatever rounding of the coordinates you've chosen directly after:
[x,y] = ginput(23);
idx2 = round(x);
idx1 = round(y);
You should also make sure that idx2 and idx1 are between 1 and the size of your image etc.
HTH

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