i want to know the pixel intensity value in an image but it gives different results using data cursor and command.which one is correct? and why it is showing differently?

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let A is image
i want to know intensity value at (25,170).so by using command A(25,170) we can find intensity value but,using data cursor it shows different intensity value

Accepted Answer

Alex Taylor
Alex Taylor on 29 Jul 2014
Impixelinfo is reporting in x,y convention. You are indexing in row,col. Index A(y,x) and this should resolve the issue.

More Answers (1)

Image Analyst
Image Analyst on 29 Jul 2014
It might use what's on the screen instead of the actual image - I don't know. Why don't you use impixelinfo(), which is meant for that sort of thing?
Image Analyst
Image Analyst on 29 Jul 2014
See Alex's answer. I should have thought of that. It's a very common mistake people make - using (x,y) when they should use (y,x) or using (row, column) when they should be using (column, row). Remember x = column, and y = row.

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