How to draw bounding boxes around the ROI obtained by thresholding.

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Sidra Aleem
Sidra Aleem 2018-4-4
评论： Image Analyst 2018-4-6
I want to highlight the region of interest using rectangular bounding box on the original image.
Can anyone here help me with this?

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回答（1 个）

Image Analyst
Image Analyst 2018-4-4
props = regionprops(binaryImage, 'BoundingBox');
for k = 1 : length(props)
thisBB = props(k).BoundingBox;
hold on;
rectangle('Position', thisBB);
end
  2 个评论
Sidra Aleem
Sidra Aleem 2018-4-5
编辑：Sidra Aleem 2018-4-6
@Image Analyst I tried the same code from the link ( https://de.mathworks.com/matlabcentral/answers/87597-rectangle-around-the-object-bounding-box ). but its gives bounding boxes in the thresholded image.
However, I donot want this. I want these bouding boxes at the same position, but on the segmented image as shown in figure1 in my questionj. I want the bounding box around the thresholded image to be in the same position, but on Blood vessel subplot.
I tried to do the following, but its not working.
st = regionprops(Thresholded_image,'BoundingBox'); % Thresholded image in subplot 2
figure,imshow(bloodVessels); %Blood Vessel Image in subplot 3
for k = 1 : length(st)
thisBB = st(k).BoundingBox;
rectangle('Position', [thisBB(1),thisBB(2),thisBB(3),thisBB(4)],...
'EdgeColor','r','LineWidth',2 )
end
As shown the third subplot doesnot have any bounding box.
Image Analyst
Image Analyst 2018-4-6
You have to switch the current axes to the one you want to put the boxes onto. For example call subplot() or axes() before you call rectangle().

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