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How do you write ntensities and pixel coordinates to a file?

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Edward Boyd
Edward Boyd 2015-2-2
回答： Image Analyst 2015-2-2
Hi, I wrote the following code:
I = imread('example.PNG');
I = rgb2gray(I);
a = (I<100 & I>50);
imshow(a);
impixelinfo
but I want to write the pixel information from a to a file, but I don't know how to get matlab to output the coordinates.
Can someone help?
(I will be eternally grateful!)

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Image Analyst
Image Analyst 2015-2-2
How about
csvwrite(filename, I);

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