Question

I would like to create a function in Matlab that, given an image, will allow one to select a pixel by clicking on it in the image and return the coordinates of the pixel. Ideally, one would be able to click on several pixels in the image in succession, and the function would store all the respective coordinates in a matrix. Is there a way to do this in Matlab?

Answer 1

ginput

Graphical input from mouse or cursor
Syntax

    [x,y] = ginput(n) 
    [x,y] = ginput 
    [x,y,button] = ginput(...)

Description

[x,y] = ginput(n) enables you to
identify n points from the current
axes and returns their x- and
y-coordinates in the x and y column
vectors. Press the Return key to
terminate the input before entering n
points.