teferrell

A million thanks, that is exactly what I needed!

That is basically what I do, however with over 100 columns it takes a while. I note the beginning and end of the filled (black), or beginning and length. Was hoping for a way to generate the count automatically.

I have a method for converting a black and white image into instructions for folding a book into the image (method is here http://www.instructables.com/id/Book-Art-How-to-Fold-a-Book-into-a-Word/). To do this I count filled pixels by column if a zoomed in image. Is there a way to generate a count of filled and unfilled spaces in an image. This would speed up one of the more tedious parts of the process. Thank you for any help.