Coordinates pixel (cpselect)

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Edward P
Edward P 2011-10-29
评论： Image Analyst 2017-2-11
Hello,
Im using this cpselect function to select control points on two images. I can get those coordinates of each control point,which is great. The problem is that those coordinates aren't pixel coordinates. how can i get my pixel coordinates from an image using an interactive method?

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Amith Kamath
Amith Kamath 2011-10-30
I would recommend using the function ginput instead, for example:
I = imread('rice.png');
imshow(I) %This is necessary for the ginput function expects a figure window to be open.
[x y] = ginput(n) %Where n is the number of points you need to interactively select.
and the x and y coordinates (of the pixel selected) will be stored in the vectors x and y.
Hope this helps!
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David Pereira
David Pereira 2017-2-11
Hello. In my case, I have an USB monochromo camera(only detects white and black) connected to the computer. The video will show a circle and 2 points. One does not move, and the other one does. I would like to get the coordinates from each point and then compare it. This information would be later processed, so I want to save the coordinates in vectores. Which functions would you recommend? Thank you
Image Analyst
Image Analyst 2017-2-11
David, start a new question and attach your image with the circle and fixed point and other, second point, and the other image with the other, second point at a different location.

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