deda_clean_document

deda_clean_document [options] input output

deda_clean_document tries to remove yellow tracking dots from the white areas of a scanned page and writes the result to output. --secure (and its alias --grayscale) converts that result to greyscale, which drops the colour channel the dots are printed in.This operates on a scan. It does not change a PDF that is about to be printed. Covering dots on a new printout is the job of deda_anonmask_create and deda_anonmask_apply.

input

Scan to read.

File to write. The extension selects the output format.

Convert the cleaned image to greyscale.

Same as --secure.

Dots that sit on top of a photograph or other non-white ink are outside what this command removes. Greyscale mode discards colour from the whole page, not only the dots.The command overwrites output when that path already exists. It does not ask for confirmation.

deda_clean_document is part of DEDA, written by Timo Richter and Stephan Escher and described in their 2018 paper on forensic analysis and anonymisation of printed documents.

deda_parse_print(1), deda_anonmask_create(1), deda_anonmask_apply(1)

Source code