Bounding Box with constraints
1 view (last 30 days)
Show older comments
Need some urgent help!
I've drawn a BoundingBox over a binary image. Now, I want to draw separate BoundingBoxes for the white pixeled regions above and below a blue horizontal line, which I've plotted on the image. If not BoundingBox, please advise on other options.
Thanks
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/157893/image.jpeg)
Answers (1)
Image Analyst
on 4 Mar 2014
Not sure where the confusion lies - seems really straightforward. I assume you have 2 x columns: x1 and x2. And you have 3 y rows: y1 (top), y2 (middle) and y3 (bottom). So the total bounding box is
% Upper Bounding box
bb1x = [x1 x2 x2 x1 x1];
bb1y = [y1 y1 y2 y2 y1];
% Lower bounding box
bb2x = bb1x;
bb2y = [y2 y2 y3 y3 y2];
% Outer, overall bounding box
bb3x = bb1x;
bb3y = [y1 y1 y3 y3 y1];
Now you can plot any of them
plot(bb1x, bb1y, 'r-', 'LineWidth', 3);
% or
plot(bb2x, bb2y, 'b-', 'LineWidth', 3);
% or
plot(bb3x, bb3y, 'g-', 'LineWidth', 3);
Isn't this what you were thinking of? If not, why not? Maybe I oversimplified what you were after.
4 Comments
Image Analyst
on 4 Mar 2014
Uh, not really. Except that you don't want just 2 or 3 boxes but lots and lots of them. Of course there are numerous ways to divide the whole thing up into a variety of sub-boxes. But maybe someone else will explain it also.
See Also
Categories
Find more on Line Plots 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!