this test image Promblem I want draw bounding box and know angle of image 4 angle
MATLAB: How to draw bounding box around white area in binary image
image acquisitionimage processingImage Processing Toolboximage segmentationMATLAB
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How about comparing length around the blob and length around the bounding box of the blob, like:
% sample blogs
I = imread('pillsetc.png');Iblob = rgb2gray(I) > 200;% measure perimeter and bounding box for each blob
stats = regionprops(Iblob,{'BoundingBox','perimeter'});stats = struct2table(stats);% extract the blob whose perimeter is close to round length of its bounding box
stats.Ratio = 2*sum(stats.BoundingBox(:,3:4),2)./stats.Perimeter;idx = abs(1 - stats.Ratio) < 0.1;stats(~idx,:) = [];% show the result
imshow(Iblob);hold onfor kk = 1:height(stats) rectangle('Position', stats.BoundingBox(kk,:),... 'LineWidth', 3,... 'EdgeColor', 'g',... 'LineStyle', ':');end
See my image segmentation tutorial http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862 where I find bright objects and get their bounding boxes.
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