Bounding box of an object in an image Matlab

Question

I want to get the object's bounding box positions (x, y, width and height) in the image and save it to a text file. As shown in the below image. So if anyone could please advise. The image can be found here

Answer 1

Assuming you have read the image using imread, this should work:

bwImage=~im2bw(img,0.98);  %making gray pixels white and (almost) white pixels black
bndBox=regionprops(bwImage,'BoundingBox');

bndBox will have top-left corner of the bounding box and its width and height stored in the format [corner_x corner_y width height].