To assign different color in boundary.

Question

Jhilam Mukherjee 2013-12-22

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https://ww2.mathworks.cn/matlabcentral/answers/110449-to-assign-different-color-in-boundary

评论： Image Analyst 2021-11-9

I want to outline the boundary of the segment image using bwperim() and get the resultant image i.e boundary.jpg, but my aim is to get an output image which outline the region of segment.jpg with different colors link red or green. How it is possible

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Answer 1

Image Analyst 2013-12-22

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https://ww2.mathworks.cn/matlabcentral/answers/110449-to-assign-different-color-in-boundary#answer_119101

在 MATLAB Online 中打开

You can use bwboundaries() and plot() to do that:

hold on;
boundaries = bwboundaries(binaryImage);
numberOfBoundaries = size(boundaries, 1);
for k = 1 : numberOfBoundaries
  thisBoundary = boundaries{k};
  plot(thisBoundary(:,2), thisBoundary(:,1), 'g', 'LineWidth', 2);
end
hold off;

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Alex Perrakis 2021-11-9

在 MATLAB Online 中打开

pic01=imread("1.tiff");
pic1=im2gray(pic01);
i=1;
boundaries=[];
for i=3:7:69;
pic050=im2gray( imread(i+".tiff") );
%pic50=im2gray(pic050);
newpicture=imsubtract(pic01,pic050);
%imshow(newpicture)
level = graythresh(newpicture);
level = 0.1405;
newbinpic = imbinarize(newpicture,level);
%imshowpair(newpicture,newbinpic,'montage')
newbinpic2=bwpropfilt(newbinpic,'perimeter',1);
% imshowpair(newbinpic2,newpicture,'montage'); 
boundariesi = bwboundaries(newbinpic2);
boundaries=[boundaries; boundariesi];
binaryImage = 0.6< newbinpic2 & newbinpic2<1;
end
figure; imshow(pic01);
hold on
for k=1:length(boundaries)
thisBoundary = boundaries{k};
x = thisBoundary(:,2);
y = thisBoundary(:,1);
plot(x,y,'r-','Linewidth',2);
end
grid off

This is my code until now

Image Analyst 2021-11-9

Yeah, you could call getdata() or getsnapshot() to get a frame and then analyze it to get the boundaries. Not sure how "real time" it would be -- how many frames per second -- but you could certainly try it.

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