Properties of object returned by imageinfo in MATLAB

In MatLab R2010B, how do I reference fields in the object returned by the function call to imageinfo? I'm

Example of the code:

imagePropObj = imageinfo('imageFile.tif');

This pops up a window showing the various properties of the image file. Then I try accessing the Width property using

imagePropObj.Width

but I get the error

??? Attempt to reference field of non-structure array.

I'm not sure what I'm doing wrong. Please help. Thanks.

imageinfo returns the handle to the figure. That is not what you want. I assume that you'd actually want to use IMFINFO, which does return a structure with a field 'Width'.