Images do not necessarily have data. When they are Imported, they have colors. If you "Mark" colors, then the colors become the 'data' component and you can work on them. You may then want to "Compute" with an expression of a.0 to extract only one of the colors from the 3-vector color component.

David

Hi all,

I have been successful in assigning colors to given structures in
'.tiff', greyscale images (via the ColorMap, Color, Mark, and Collect
modules).  Now, I would like to calculate the percentage (of
pixel-values per image) of these newly-colored structures.  Thus far, I
have attempted to use the following modules:  Include, Inquire, Compute,
and Statistics, yet I seem to receive error messages such as "Invalid
data: missing data component" or "Invalid data: input must be an array". Somehow, through the flow of the modules, I must've lost the "positions"
and/or "data" array (I think this is my problem).  Can someone please tell
me how to complete the solution to my problem?

Thanks,
Kelly
______________________________________________________________________________
Kelly G. Gallagher
New Mexico State University, Department of Biology, Department 3AF, Box 30001,
Las Cruces, New Mexico 88003, phone: (505) 646-3611 / fax: (505)646-5665
______________________________________________________________________________

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.............................................................................
David L. Thompson                          The University of Montana
mailto:[EMAIL PROTECTED]                 Computer Science Department
http://www.cs.umt.edu/u/dthompsn           Missoula, MT  59812
                                           Work Phone : (406)257-8530

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