add an slider to get value for activecontour

Question

Peyman Obeidy 2017-3-30

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/332682-add-an-slider-to-get-value-for-activecontour

回答： Peyman Obeidy 2017-4-5

% Display segmented image
BWsIbf = activecontour(ImCh1,BWCh1, 400, 'edge');
%   FinalImwithMask=imfuse(BWsIbf,ImCh1);
%   imshow(FinalImwithMask);
 % figure, imshow(ImCh1);
  %title('Segmented Image');
    [B,L] = bwboundaries(BWsIbf,'noholes');
  imshow(ImCh1,[]);%label2rgb(L, @jet, [.5 .5 .5]))
   hold on
   for k = 1:length(B)
      boundary = B{k};
     plot(boundary(:,2), boundary(:,1), 'r', 'LineWidth', 2);
   end

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Peyman Obeidy 2017-3-30

在 MATLAB Online 中打开

smapleImage.mat

This is how far I get it (see the code below), but I am getting an error:

function making_SliderForIm(ImCh1,BWCh1)
global I 
global Imask
Imask=BWCh1;
I=ImCh1;
imshow(I,[]);
%create a slider
sld=uicontrol('Style', 'slider',...
    'Min',1,'Max',50,'Value',41,...
    'Position', [400 20 120 20],...
    'Callback', @SliderVal);
      function SliderVal(source,event)
          val=source.Value;
% Display segmented image
BWsIbf = activecontour(I,Imask, 1+val, 'edge');
      [B,L] = bwboundaries(BWsIbf,'noholes');
    imshow(I,[]);%label2rgb(L, @jet, [.5 .5 .5]))
     hold on
     for k = 1:length(B)
        boundary = B{k};
       plot(boundary(:,2), boundary(:,1), 'r', 'LineWidth', 2);
     end
      end
   end

the error is :

Error using activecontour
Expected input number 3, N, to be integer-valued.
Error in activecontour>parse_inputs (line 302)
        validateattributes(N,{'numeric'},{'positive','scalar','finite', ...
Error in activecontour (line 224)
[A, mask, N, method, smoothfactor,contractionbias] = parse_inputs(varargin{:});

Peyman Obeidy 2017-3-30

编辑：Peyman Obeidy 2017-3-30

I used ceil , thanks.

There is another problem, I need the image to get updated. At the moment, it get the value and open another figure.

Peyman Obeidy 2017-3-30

在 MATLAB Online 中打开

   function making_SliderForIm(ImCh1,BWCh1)
global I 
global Imask
Imask=BWCh1;
I=ImCh1;
imshow(I,[]);
%create a slider
sld=uicontrol('Style', 'slider',...
    'Min',1,'Max',50,'Value',41,...
    'Position', [400 20 120 20],...
    'Callback', @SliderVal);
      function SliderVal(source,event)
          val=ceil(source.Value);
% Display segmented image
BWsIbf = activecontour(I,Imask, 1+val, 'edge');
      [B,L] = bwboundaries(BWsIbf,'noholes');
    imshow(I,[]);%label2rgb(L, @jet, [.5 .5 .5]))
     hold on
     for k = 1:length(B)
        boundary = B{k};
       plot(boundary(:,2), boundary(:,1), 'r', 'LineWidth', 2);
     end
      end
   end