Calculate each object maximum height and weight
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How can I calculate each object maximum height and weight in the following example?
I used this code:
clc;
clear;
I = rgb2gray(imread('http://i67.tinypic.com/14jxq0y.jpg'));
adpt1 = imbinarize(I);
adpt1 = imfill(adpt1, 'holes');
[B,L] = bwboundaries(adpt1,'noholes');
stat = regionprops(adpt1,'All');
imshow(adpt1);
hold on
for k = 1 : length(B)
b = B{k};
c = stat(k).Centroid;
plot(b(:,2),b(:,1),'g','linewidth',3);
text(c(1),c(2),num2str(k),'backgroundcolor','g');
end
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/160358/image.jpeg)
1 Comment
Walter Roberson
on 2 Feb 2017
You have curved objects.
For "height" are you looking for the height of the highest point minus the height of the lowest point?
Are you looking to do the equivalent of running a ruler horizontally along the figure and examine the maximum point minus the minimum point at each column, and find the largest difference amongst those -- the "thickest" vertical?
In your object #4, top center, the left side is concave, so if you did that you would have a gap along the vertical line: is only the solid part to be counted, or the furthest reaches?
Are you looking to find the maximum axes and the axes 90 degrees to that? For example in object #6, right center, the maximum axis is along the diagonal from top left to bottom right: is that one of the distances to be measured, and then the other would be the diagonal from bottom left to top right?
Accepted Answer
Image Analyst
on 2 Feb 2017
Ask regionprops to return the Bounding Box.
In the loop
thisBB = stats(k).BoundingBox
thisWidth = thisBB(3);
thisHeight = thisBB(4);
hold on;
rectangle('Position', thisBB, 'EdgeColor', 'c');
6 Comments
Walter Roberson
on 4 Feb 2017
Edited: Walter Roberson
on 4 Feb 2017
Hee. I see you've started using my naming practice of " this such and such" ;-)
Image Analyst
on 4 Feb 2017
I think I picked that up in 2003 when I learned Java. I thought it was a good idea so I use it occasionally.
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