How can I use imellipse on a GUI?

2 views (last 30 days)
Rossy Drucker Shaooli
Rossy Drucker Shaooli on 3 Jun 2019
I want to draw a circle using imellipse on an image in a gui and then using a button get the position of that circle. However when I try to run the code, it gives an error saying there are not enough input arguments, eventhough the syntax is imellipse(hparent).
function SAMPLE(hObject,eventdata, handles)
vid = VideoReader('filename.avi');
frames = read(vid);
conv = rgb2gray(frames);
fig = uifigure;
[yax, xax] = size(conv);
ax = uiaxes('Parent',fig,'XLim',[0,xax],'YLim',[0,yax]);
imagesc(ax, conv)
btn = uibutton(fig,'push','Text','Ready','Position',[420,218,100,22],'ButtonPushedFcn', @expCirc);
circ = imellipse(handles.axes);
function expCirc(btn,event)
pos = getPosition(circ);
x = pos(1,1);
y = pos(1,2);
w = pos(1,3);
h = pos(1,4);
center = [x+(w/2),y+(h/2)];
radius = w/2*1.5;
ncirc = viscircles(center, radius);
end
end
  6 Comments
Rossy Drucker Shaooli
Rossy Drucker Shaooli on 4 Jun 2019
I solved it, my problem was that I was triying to use a GUI but I didn't really need it. Thanks for your help anyways!

Sign in to comment.

Answers (1)

Dennis
Dennis on 4 Jun 2019
When asking a question you should always include the complete error message.
My guess is that your error message tells you that you do not have enough input arguments, because your SAMPLE function is not a callback.
Beyond that i think you might run into a few problems using the uifigure/uiaxes instead of figure/axes.
function SAMPLE
vid = VideoReader('filename.avi');
frames = read(vid);
conv = rgb2gray(frames);
fig = figure;
[yax, xax] = size(conv);
ax = axes('Parent',fig,'XLim',[0,xax],'YLim',[0,yax]);
imagesc(ax, conv)
btn = uicontrol('style','pushbutton','string','Ready','Position',[420,218,100,22],'callback', @expCirc);
circ = imellipse(ax);
function expCirc(btn,event)
pos = getPosition(circ);
x = pos(1,1);
y = pos(1,2);
w = pos(1,3);
h = pos(1,4);
center = [x+(w/2),y+(h/2)];
radius = w/2*1.5;
ncirc = viscircles(center, radius);
end
end
  1 Comment
Rossy Drucker Shaooli
Rossy Drucker Shaooli on 4 Jun 2019
Thank you!! This worked perfectly!

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!