How to draw single bounding box by combining all bounding boxes
4 views (last 30 days)
Show older comments
Hello everyone, I hope you are doing well. I have the image in which i want to draw bounding box on the object.
I have write the following code, which convert the image in binary form and draw the bounding box around white object.
But i want to draw a single bounding box. How can i draw or combine all bounding boxes in MATLAB and plot it on original Image.
Image=imread('GFSK.png')
im1=im2bw(Image);
invertedI = ~im1
[labeledImage, numRegions] = bwlabel(invertedI);
props = regionprops(labeledImage,'all' );
allLengths = [props.Area];
% NumberofPulses=allLengths;
centroids = vertcat(props.Centroid);
figure;
hold on;
for k = 1 : numRegions
y1 = round(centroids(k, 2));
y2 = y1;
xt = props(k).Centroid(1);
yt = props(k).Centroid(2);
BB = props(k).BoundingBox;
rectangle('Position', [BB(1),BB(2),BB(3),BB(4)],'EdgeColor','b','LineWidth',1) ;
caption = sprintf('Class 1') ;
hold off
title(caption, 'FontSize',10);
end
0 Comments
Accepted Answer
KSSV
on 25 Aug 2022
Image=imread('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1107335/GFSK.png') ;
im1=im2bw(Image);
invertedI = ~im1 ;
[labeledImage, numRegions] = bwlabel(invertedI);
props = regionprops(labeledImage,'all' );
allLengths = [props.Area];
% NumberofPulses=allLengths;
centroids = vertcat(props.Centroid);
X = zeros(numRegions,4) ;
Y = zeros(numRegions,4) ;
figure;
hold on;
for k = 1 : numRegions
y1 = round(centroids(k, 2));
y2 = y1;
xt = props(k).Centroid(1);
yt = props(k).Centroid(2);
BB = props(k).BoundingBox;
rectangle('Position', [BB(1),BB(2),BB(3),BB(4)],'EdgeColor','b','LineWidth',1) ;
X(k,:) = [BB(1) BB(1)+BB(3) BB(1)+BB(3) BB(1)] ;
Y(k,:) = [BB(2) BB(2) BB(2)+BB(4) BB(2)+BB(4)] ;
caption = sprintf('Class 1') ;
hold off
title(caption, 'FontSize',10);
end
x0 = min(X(:)) ; x1 = max(X(:)) ;
y0 = min(Y(:)) ; y1 = max(Y(:)) ;
L = abs(x1-x0) ;
B = abs(y1-y0) ;
rectangle('Position', [x0 y0 L B],'EdgeColor','r','LineWidth',1) ;
6 Comments
More Answers (0)
See Also
Categories
Find more on Modify Image Colors in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!