How to find the location of pixel values in an image



dear MATLAB users

i am working on a project.I have an image(gray image) of a printed
circuit board(PCB) which have black points on it.These points are the
drill locations(where the drilling is done).I want to find the
locations of these points (like as to finding the X-Y coordinates
with respect to origin(0,0) ).My question is that is MATLAB have any
function to find the specific location of a point(pixel)?.Please tell
me if any exists.I will be very thankful to you
yours sincerely
Umair
.



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