Within screen-scraper you have the ability to call outside programs directly from your scripts. The following is an example scraping session that makes use of Tesseract OCR and Imagemagick in order to take an image from the internet and attempt to read the text of the image.
As is, the scraping session is intended to run on Linux. However, it is possible to run both dependent programs under Windows either directly or using Cygwin.
Download and import the following scraping session.