How to return the height of a bounding box

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

Answer 1

[Sean de Wolski]

Use regionprops, with the 'BoundingBox' option. The height is the the "width" of the first dimension (rows).

doc regionprops

[Jack Sparrow]

Thanks sean, but I dont understand. the bbox return a 4x360 matrix. I can I know the width.

[Sean de Wolski]

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