Thread Subject: continue m-file after using impoint

I am using impoint to digitise a number of points in an image. I want to digitise an unknown number of points, then continue with the rest of the m-file fater this has been done. I would like to the user to be able to push a button or keyboard to continue. My current method uses a while loop, but I cannot figure out how to break out of this loop once the user has finished digitising the points.
Oli

"Oliver Warlow" <oli.warlow@gmail.com> wrote in message <hmqrih$shm$1@fred.mathworks.com>...
> I am using impoint to digitise a number of points in an image. I want to digitise an unknown number of points, then continue with the rest of the m-file fater this has been done. I would like to the user to be able to push a button or keyboard to continue. My current method uses a while loop, but I cannot figure out how to break out of this loop once the user has finished digitising the points.
> Oli

Oliver ,
you might want to look at ginput for your needs but if you want to use impoint you can use its wait property. Here is a demo of how you might approach it.

function impointDigitizeDemo
    figure;
    hIm = imshow('pout.tif');
    hAx = get(hIm,'Parent');
    title(hAx,'Click on Image to place digitizer point');
    p = impoint(hAx,[]);
    title(hAx,'Drag Point to digitize, double click point to continue');
    drawnow;
    digitizedPoints = p.getPosition;
    % Construct boundary constraint function
    fcn = makeConstrainToRectFcn('impoint',get(hAx,'XLim'),get(hAx,'YLim'));
    p.setPositionConstraintFcn(fcn);
    callbackID= p.addNewPositionCallback(@digitizePoints);
    finalPoint =wait(p);
    p.removeNewPositionCallback(callbackID);
    digitizedPoints = [digitizedPoints;finalPoint];
    h2 = figure;
    axes('Parent',h2);
    digitizedPoints = unique(digitizedPoints,'rows');
    plot(digitizedPoints(:,1),digitizedPoints(:,2),'.');
    
    
    function digitizePoints(newPos)
        digitizedPoints = [digitizedPoints;newPos];
    end %digitizePoints

end %impointDigitizeDemo


Hope this helps
Matt W