i creating image processing project in matlab. want 5 coordinates image mouse , save them matrix. when run project, click once matrix taking same coordinates. how can fix ?
function imageclickcallback ( objecthandle , eventdata ) array = 3:2; = 1:3 axeshandle = get(objecthandle,'parent'); coordinates = get(axeshandle,'currentpoint'); coordinates = coordinates(1,1:2); array(i,1) = coordinates(1); array(i,2) = coordinates(2); end disp(array); for example when click point on image, taking result. can't select points.
99.3806 37.1915 99.3806 37.1915 99.3806 37.1915
a safer alternative use ginput, can select variable number of points , store coordinates easily. don't need loop; coordinates stored once points selected.
here simple example:
clear clc close = imread('peppers.png'); imshow(a,[]); hold on %// number of points n = 5; array = zeros(n,2); %// use loop , plot 1 point @ time. k = 1:n [array(k,1),array(k,2)] = ginput(1); %// display points scatter(array(k,1),array(k,2),60,'k','filled') end sample output array:
123.0000 87.0000 95.0000 206.0000 256.0000 85.0000 236.0000 253.0000 395.0000 117.0000 and image points displayed:
therefore, this:
function imageclickcallback ( objecthandle , eventdata ) array = zeros(3,2); [array(:,1),array(:,2)] = ginput(3); 