deda_anonmask_apply

deda_anonmask_apply [options] mask pdf

deda_anonmask_apply reads a mask from deda_anonmask_create and stamps that dot pattern onto a copy of a PDF. It prints the offset, dot radius, and scale it used, then writes masked.pdf in the working directory. Print that file with a zero page margin, the same margin used for the calibration page.Pages that contain white or light areas inside images need the Wand Python package, which binds to ImageMagick. Without it, those areas are left unmasked. The rest of the page is still processed.

mask

Mask file written by deda_anonmask_create -r, usually mask.json.

PDF to stamp. The original file is not modified.

Extra horizontal and vertical shift of the dot grid, in inches.

Radius of each dot, in inches. The default is the toolkit's built-in radius.

Draw magenta dots instead of yellow ones.

Repeat to print more diagnostic detail.

The output path is always masked.pdf in the current directory. A file of that name is overwritten. The input PDF is not changed.Alignment depends on the printer using the same margin as the calibration print. --xoffset, --yoffset, and --dotradius are the adjustments when the grid does not cover the printer's own dots. A mask built with deda_anonmask_create --copy reproduces a pattern instead of hiding one.Yellow dots on a finished print are hard to see. --debug is the way to confirm placement before using yellow.

deda_anonmask_apply 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_anonmask_create(1), deda_create_dots(1), deda_clean_document(1), deda_parse_print(1)

Source code