ginput with right mouse button

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daniel
daniel 2014년 3월 25일
댓글: Image Analyst 2014년 4월 19일
hello, i would like to use apply ginput function in such way that the user will chose the amount of coordinates to save (left click) and when he decide to finish so he will click the right button on the mouse.
how do i apply this?
thanks

채택된 답변

Image Analyst
Image Analyst 2014년 3월 25일
If you have the Image Processing Toolbox, you can use impoint() instead of ginput().
  댓글 수: 5
Joseph Cheng
Joseph Cheng 2014년 3월 27일
See my second post to your question below about how to get the right click.
Image Analyst
Image Analyst 2014년 4월 19일
Daniel, try getpts() instead of ginput:
grayImage = imread('cameraman.tif'); % Read the image into an array
imshow(grayImage); % Display the image
[x,y] = getpts

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추가 답변 (1개)

Joseph Cheng
Joseph Cheng 2014년 3월 25일
I do not know if ginput will let you use the right mouse button the way you want. But you can go with something like this. which will select the range of points with the left click. Perhaps a prompt to say these are the points you select, are you sure?
t=1:100;plotDATA = rand(1,100);
figure,plot(t,plotDATA)
[x,y] = ginput(2);
x = sortrows(x);
sectiont = t(ceil(x(1)):floor(x(2)));
sectionData = plotDATA(ceil(x(1)):floor(x(2)));
hold on, plot(sectiont,sectionData,'r.')
  댓글 수: 2
Joseph Cheng
Joseph Cheng 2014년 3월 26일
Thinking about it more, to get the right click to finalize the selection of points you can use
set(gcf,'WindowButtonDownFcn', yourfunctionhere);
Write a function that uses get(gcf,'SelectionType') which will detect whether it is a left, right, or middle click. Filter for right click with a switch statement that will store or return the points selected by Image Analyst method.
  1. normal: left mouse button
  2. extend: right mouse button on a 2-button mouse; middle mouse button on a 3-button mouse
  3. alt: left+right buttons on a 2-button mouse; right mouse button on a 3-button mouse
  4. open:double mouse click
an example of this function working and detecting what mouse button is pressed:
figure,plot(1:100);
set(gcf,'WindowButtonDownFcn', 'disp(get(gcf,''SelectionType''));');
daniel
daniel 2014년 3월 27일
Thanks!

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