Bounding box using MATLAB for the image

Question

I am trying to draw a bounding box around the white blob in the image below:

Answer 1

Pseduo -

• Pick largest y, largest x, smallest x, smallest y with in the blob. That is, points on the blob. These are your coordinates that you can use to build the bounding box.

assuming top left of image as (0,0)

(smallestX,smallestY)-----------------(largestX,smallestY)    
      |                                      |
      |                                      |          
      |                                      | 
      |                                      |
(smallestX,largestY)------------------(largestX,largestY)    

And for finding minimum/maximum values and indices.

[r,c]=find(img==min(min(img)))
[r,c]=find(img==max(max(img)))

r,c represent row and column in the img matrix.

• I have marked the points on your image that you can use to create the bounding box.
• Zoomed Image to get a better view.