Uncalibrated Stereo Image Rectification

Hi,

I am trying to do this example using the same commands the only different is that I used 2 different pictures that what it is provided. http://www.mathworks.com/help/vision/examples/uncalibrated-stereo-image-rectification.html

this is the error I get:

Error using imfuse>parse_inputs (line 316) Argument 'method' failed validation with error: Expected METHOD to match one of these strings:

falsecolor, diff, blend, montage

The input, ''ColorChannels'', did not match any of the valid strings.

What is the problem why I can not run the same example.