How to draw many rectangles in matlab?

Asked by Aneta Ch on 13 Jan 2019

Latest activity Commented on by Image Analyst on 6 Feb 2019 at 3:54

23 views (last 30 days)

This question was flagged by Image Analyst

Show flags

Any ideas for how to draw many rectangles in Matlab using conv or nlfilter?

This is my code:

for r = 1:step:imH - windowH + 1
    for c = 1:step:imW - windowW + 1
        
        W = I(r:r + windowH - 1, c:c + windowW - 1, :);
        pos = [r c windowH windowW];
    
        
if p > 7
   subplot(121); imshow(I); title 'Image';
   hold on;      
            
rectangle('Position', pos, 'FaceColor', '(1 0 0)'); 
        
end
    end
    

1 Comment

Image Analyst on 6 Feb 2019 at 3:54

Note: aneta, for some reason, got rid of the original question and replaced it with one where the answers below no longer make sense.

1 Answer

Link

Answer by Image Analyst on 13 Jan 2019

You forgot to attach your image.

Why not simply use the Color Thresholder app on the Apps tab of the tool ribbon?

Or else vectorize your code?

1 Comment

Image Analyst on 13 Jan 2019

Well it might work but it would be easier if you used the Color Thresholder.

Also, see these links:

https://www.mathworks.com/help/images/color-based-segmentation-using-k-means-clustering.html?searchHighlight=color%20segmentation&s_tid=doc_srchtitle

https://www.mathworks.com/help/images/color-based-segmentation-using-the-l-a-b-color-space.html?s_tid=answers_rc2-3_p6_MLT

You are now following this question

Aneta Ch (view profile)