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How to return the height of a bounding box

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Jack Sparrow
Jack Sparrow 2013-2-27
How can I return the height of a bounding box of an object to the work space from an object detection algorithm like Gaussian Mixture Model in matlab

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Sean de Wolski
Sean de Wolski 2013-2-27
Use regionprops, with the 'BoundingBox' option. The height is the the "width" of the first dimension (rows).
doc regionprops
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Jack Sparrow
Jack Sparrow 2013-3-5
Thanks sean, but I dont understand. the bbox return a 4x360 matrix. I can I know the width.
Sean de Wolski
Sean de Wolski 2013-3-5
That's what you want:
x = imread('coins.png')>100;
bb = regionprops(x,'BoundingBox')
bbMatrix = vertcat(bb(:).BoundingBox)
Now the third column is the height and the fourth is the width:
bbMatrix(:,3);%height

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