MATLAB GUI: how to get mouse click coordinates(need more help on details!)

Question

I am trying to gat the x,y coordinate of the image I loaded in axes by clicking the mouse. I've seen a few answers, such as this one MATLAB how to get mouse click coordinates My questions is where(under which function?) should I put the

imageHandle = imshow(imageObj);

as well as

set(imageHandle,'ButtonDownFcn',@ImageClickCallback);

Sorry for this naive question, Thanks!

Answer 1

I've had good success using the "impixel" function as a way to detect x,y coordinates. I would give this a shot:

imageHandle = imshow(imageObj);
[clicked_col clicked_row rgb_info] = impixel

Note: impixel allows multiple clicks. Press "Enter" to return the x,y info once you're done clicking.