PS generated file -> pdftotext -layout and images

[Gary Stainburn]

Hi folks,

Thanks to help from here I've managed to get pseudo printers working with CUPS 
to allow Windows PC's to print a document which then gets converted to PDF, 
has stationery applied to it, and the result emailed back to the requesting 
user.

I'm now on phase 2 of the project which uses

pseudo printer -> ps2pdf -> pdftotext -layout

to generate a text file which then is used to import data into my systems.  
This method is because the system that generates the report doesn't have an 
export facility.

My only problem with this is that the generating system uses images of a tick 
and a cross to indicate some boolean values.

Can anyone suggest how I can convert these ticks and crosses back to their 
boolean value?