How to select an object if you click it?

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Meshooo
Meshooo 2014-1-15
评论： SC P 2018-11-26
Dear all,
I have an image the contains few objects as I show here. I want that if the user click inside an object using the mouse then this clicked object will remain and all other objects will be removed from the image.
Is there someway to do that?
Any help will be appreciated.
Meshoo

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采纳的回答

Image Analyst
Image Analyst 2014-1-15
Yes. Follow these steps
  1. label the binary image with bwlabel
  2. call [column, row] = int32(ginput(1)) to let the user click somewhere
  3. get the label with labelNumber = labeledImage(row, column)
  4. extract the object with extractedObject = ismember(labeledImage, labelNumber)
  5. Make it binary again binaryImage = extractedObject > 0;
  6. display it with imshow(binaryImage, []);
  2 个评论
Meshooo
Meshooo 2014-1-15
clear all
clc
%
I = imread('regular_shapes.tif');
%
BW = im2bw(I);
%
figure, imshow(BW);
hold on
[yCenter, xCenter] = ginput(1)
hold off
%
b = bwboundaries(BW);
%
[L, num_Obj] = bwlabel(BW, 4);
%
for k = 1:num_Obj;
Obj = L ==k;
bb = b{k};
X_obj = bb(:, 1);
Y_obj = bb(:, 2);
Selec{k} = inpolygon(xCenter,yCenter,X_obj,Y_obj);
end
Selec;
%
Selec = [Selec{:}];
[value,index] = max(Selec);
%
Obj = L ==index;
%
figure, imshow(Obj);
SC P
SC P 2018-11-26
Error came while running script"
Brace indexing is not supported for
variables of this type.
Error in boundin_box_26_11 (line 75)
Selec = [Selec{:}];

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