draw bounding box around a character
2 views (last 30 days)
Show older comments
Elysi Cochin
on 24 May 2020
Commented: Elysi Cochin
on 25 May 2020
The code i used is
Ch = bw(boundrow(1):boundrow(end),boundcol(1):boundcol(end));
i'll get the character into the variable Ch
how can i draw a bounding box in the image
0 Comments
Accepted Answer
Image Analyst
on 24 May 2020
Presumably you used regionprops()
props = regionprops(binaryImage, 'BoundingBox');
% Plot all the bounding boxes.
hold on;
for k = 1 : length(props)
rectangle('Position', props(k).BoundingBox, 'EdgeColor', 'y');
end
3 Comments
Image Analyst
on 24 May 2020
I would not do it that way, but if you insist, after you get Ch you can put a box around the rectangle in the original image like this:
line([boundcol(1), boundcol(end)], [boundrow(1), boundrow(1), 'Color', 'y', 'LineWidth', 2);
line([boundcol(1), boundcol(end)], [boundrow(end), boundrow(end), 'Color', 'y', 'LineWidth', 2);
line([boundcol(1), boundcol(1)], [boundrow(1), boundrow(end), 'Color', 'y', 'LineWidth', 2);
line([boundcol(end), boundcol(end)], [boundrow(1), boundrow(end), 'Color', 'y', 'LineWidth', 2);
or
% Make rect = [xLeft, yTop, width, height]
r = [boundcol(1), boundrow(1), abs(boundcol(end) - boundcol(1)), abs(boundrow(end) - boundrow(1))];
rectangle('Position', r, 'EdgeColor', 'y', 'LineWidth', 2);
More Answers (0)
See Also
Categories
Find more on Image Processing Toolbox in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!