Rectangle around the object, Bounding box,
显示 更早的评论
Hello, I used this code to make rectangle around the object at binary image:
st = regionprops(BW, 'BoundingBox' );
figure, imshow('MY_IMAGE.jpg')
rectangle('Position',[st.BoundingBox(1),st.BoundingBox(2),st.BoundingBox(3),st.BoundingBox(4)],...
'EdgeColor','r','LineWidth',2 )
but if I have more than one object, this code doesn't working How can I draw N rectangles for N objects on image? Thank you
4 个评论
sukku
2017-3-30
I want to find out an region properties of below image
Image Analyst
2017-3-30
Kimo Kalip
2018-7-2
The image segmentation strategy included in that tutorial works great for well defined, solid images on a relatively consistent background. However, what do you do when you're trying to work with objects that aren't perfectly defined or shaped? Like what if you had something with various holes like a slinky or spring?
Image Analyst
2018-7-2
Well that's where the art of designing an image analysis algorithm comes in. You're right - it's not so straightforward and easy. That's what keeps people like me employed.
采纳的回答
Image Analyst
2013-9-18
Put it in a loop (untested)
for k = 1 : length(st)
thisBB = st(k).BoundingBox;
rectangle('Position', [thisBB(1),thisBB(2),thisBB(3),thisBB(4)],...
'EdgeColor','r','LineWidth',2 )
end
9 个评论
Felix
2013-9-19
Rupali
2013-12-12
thanks a lot
INPUT IMAGE:
___________________________________________________________________________ MATLAB CODE: ___________________________________________________________________________ clear all; close all; clc image=imread('a_ASL3.jpg'); BW=binary_image(image); BW = ~BW; st = regionprops(BW, 'BoundingBox' ); for k = 1 : length(st) thisBB = st(k).BoundingBox; rectangle('Position', [thisBB(1),thisBB(2),thisBB(3),thisBB(4)],... 'EdgeColor','r','LineWidth',2 ) end ___________________________________________________________________________
OUTPUT IMAGE:
___________________________________________________________________________ Problem: I want bounding box just around hand so that I can crop it and do further operations but I am getting image as output in which there is bounding box around every object.
Image Analyst
2014-1-19
Can you start your own thread so you'll get emails about updates instead of Felix?
Explorer
2014-1-19
Sure
syhem samti
2015-11-19
does it work the same way as "vision.BlobAnalysis"? same results?
Torkan
2019-10-16
Hi,
How can we define the length and width of these rectangles?
DANIEL SYAFIQ
2023-1-4
THANK YOU SO MUCH IMAGE ANALYST.
更多回答（5 个）
Tiago Almeida
2017-10-11
编辑：Image Analyst
2017-10-11
How can i draw the rectangles with the same size using this code?
labeledImage = bwlabel(A);
measurements = regionprops(labeledImage, 'BoundingBox', 'Area');
for k = 1 : length(measurements)
thisBB = measurements(k).BoundingBox;
rectangle('Position', [thisBB(1),thisBB(2),thisBB(3),thisBB(4)],...
'EdgeColor','r','LineWidth',2 )
end
4 个评论
Image Analyst
2017-10-11
Instead of having variable widths and heights, like this thisBB(3),thisBB(4), replace that with some fixed widths and heights.
rectangle('Position', [thisBB(1),thisBB(2), fixedWidth, fixedHeight],...
'EdgeColor','r','LineWidth',2 )
Maham Khan
2018-5-3
how can we store/save the four values of bounding box for more than one images in a mat/text file calculated through following code
for k = 1 : length(measurements)
thisBB = measurements(k).BoundingBox;
rectangle('Position', [thisBB(1),thisBB(2),thisBB(3),thisBB(4)],...
'EdgeColor','r','LineWidth',2 )
end
Image Analyst
2018-5-4
Try this:
allBB = zeros(length(measurements), 4);
for k = 1 : length(measurements)
thisBB = measurements(k).BoundingBox;
rectangle('Position', [thisBB(1),thisBB(2),thisBB(3),thisBB(4)],...
'EdgeColor', 'r', 'LineWidth', 2)
allBB(k, :) = thisBB;
end
Maham Khan
2018-5-7
Thanks @Image Analyst
Hafsa Asad
2017-1-28
编辑：Hafsa Asad
2017-1-28
Here is an even simpler way to do it if you have the binary image with white blobs
st = regionprops(my_binary_image, 'BoundingBox', 'Area' );
for ii= 1 : length(st)
Areai(ii)= st(ii).Area;
end
largest_blob_id= find(Areai==max(Areai));
imshow(my_binary_image)
rectangle('Position'[st(largest_blob_id).BoundingBox(1),st(largest_blob_id).BoundingBox(2),st(largest_blob_id).BoundingBox(3),st(largest_blob_id).BoundingBox(4)], 'EdgeColor','r','LineWidth',2 )
2 个评论
Image Analyst
2017-1-28
That would be good if he wanted to draw the box around only the largest blob instead of drawing "N rectangles for N objects". An even shorter way would be to get rid of the for loop like this:
st = regionprops(my_binary_image, 'BoundingBox', 'Area' );
[maxArea, indexOfMax] = max([st.Area]);
rectangle('Position'[st(indexOfMax).BoundingBox(1),st(indexOfMax).BoundingBox(2),st(indexOfMax).BoundingBox(3),st(indexOfMax).BoundingBox(4)], 'EdgeColor','r','LineWidth',2 )
Hafsa Asad
2018-9-21
Image Analyst, you are right. thanks.
sidraa Aleem
2018-4-4
@Image Analyst I am trying to use the following code to do exactly what Felix wanted,but I am having error.
for k = 1 : length(st)
thisBB = st(k).BoundingBox;
rectangle('Position', [thisBB(1),thisBB(2),thisBB(3),thisBB(4)],...
'EdgeColor','r','LineWidth',2 )
end
Error using rectangle Value not a numeric scalar Please help me to resolve it.
Masar Uthaib
2019-12-1
编辑：Image Analyst
2022-4-3
Hello
rectangle('Position',[st.BoundingBox(1),st.BoundingBox(2),st.BoundingBox(3),st.BoundingBox(4)],...
'EdgeColor','r','LineWidth',2 )
does not operate with me. Can anyone clarify to me what is wrong?
1 个评论
Image Analyst
2022-4-3
No one, except you, did that. This should work if you have a single blob:
rectangle('Position', st.BoundingBox, 'EdgeColor','r','LineWidth',2 )
If you have multiple blobs, try this:
measurements = regionprops(mask, 'BoundingBox');
allBB = vertcat(props.BoundingBox);
hold on;
for k = 1 : length(measurements)
thisBB = measurements(k).BoundingBox; % Or allBB(k, :)
rectangle('Position', thisBB, 'EdgeColor', 'r', 'LineWidth', 2);
end
hold off;
Muhammad Zulkifli
2023-5-14
0 个投票
How can i get bounding box ?
1 个评论
Image Analyst
2023-5-14
It has been explained about how to use regionprops to get the bounding box of blobs in your binary image. In short:
props = regionprops(binaryImage, 'BoundingBox');
allBoundingBoxes = vertcat(props.BoundingBox)
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