"Convert scanned document images to monochrome pdf" Requirements: a. textcleaner script (http://www.fmwconcepts.com/imagemagick/textcleaner/). Please refer the license of the textcleaner script before using it. b. ImageMagick. c. pdftk Syntax: ./run <file-name> <no-of-files> <file-ext> Example usage: (1) ./run canny 4 png It will search for files named png/canny-1.png png/canny-2.png png/canny-3.png png/canny-4.png, convert them to pdf, and save it as all.pdf in the current directory. (2) ./run viola 2 jpg It will search for files named jpg/viola-1.jpg jpg/viola-2.jpg, convert them to pdf, and save it as all.pdf in the current directory.