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AMC-ANALYSE(1)		     Auto Multiple Choice		AMC-ANALYSE(1)

NAME
       AMC-analyse - automatic data capture from scans for AMC multiple	choice
       exams.

SYNOPSIS
       auto-multiple-choice analyse --projet project-dir
			    [--seuil-coche threshold] [--tol-marque tol]
			    [--list-fichiers files-list.txt | scan-files...]

DESCRIPTION
       The AMC-analyse.pl command performs automatic data capture from scans
       of completed answer sheets of an	AMC multiple choice questionnaire.
       Before calling AMC-analyse.pl, AMC-prepare(1) should have been called
       to make working documents (--mode s) and	the layout should have been
       processed with AMC-meptex(1).

       --data data-dir
	   gives the directory where data files	are (see for example AMC-
	   meptex(1)). Defaults	to project-dir/data.

       --cr project-cr-dir
	   gives a directory where to create image reports of the data capture
	   (zooms on the boxes in a zooms sub-directory, name filed extraction
	   as a	name-*.jpg file, and layout report as a	page-*.jpg file).

       --projet	project-dir
	   When	using this option, if --cr is not used,	project-cr-dir will be
	   set to project-dir/cr.

       Giving the names	of the scan files to process can be done in two	ways:

       o   these names can be given as arguments,

       o   these names can be written to a plain file (one filename per	line),
	   using the --list-fichiers files-list.txt to give the	name of	this
	   file.

       Some parameters for data	capture	may be set using the following
       options:

       --prop proportion
	   sets	the proportion of each box that	will be	measured to decide if
	   the box is ticked or	not. Default value is 0.8.

       --bw-threshold threshold
	   This	parameter is used when converting the grayscale	scan file to
	   black and white. To get more	black pixels, use a greater value. To
	   get more white pixels, use a	smaller	value. The threshold must be
	   between 0 and 1. The	default	value is 0.6.

       --ignore-red
	   With	this option, only red channel will be used from	color scans.
	   This	way, all that is written in red	will be	ignored	in the scan.
	   This	can be useful when the boxes are printed in red.

       --tol-marque tol
	   defines the tolerance when detecting	the four marks in the scans
	   corners. These marks	are detected looking for black connected
	   components which dimensions are closed to the target	dimension
	   target (exact dimensions of the marks if printing/scanning process
	   where perfectly accurate). If tol is	a real number, accepted
	   dimensions are those	between	(1-tol)*target and (1+tol)*target. If
	   tol is "tinf,tsup" (where tinf and tsup are real numbers), accepted
	   dimensions are those	between	(1-tinf)*target	and (1+tsup)*target. A
	   standard value is 0.2.

       --multiple
	   This	option is to be	used when the scans are	photocopies from some
	   subjects (different students	can have the same subject). In this
	   case, copy numbers are allocated to students	so that	their answer
	   sheets, with	the same subject number, can be	differentiated.

       --pre-allocate copy_id
	   This	option can be used in conjunction with --multiple. The copy
	   numbers used	for the	scans will start from copy_id, in the same
	   order than the scans	given as arguments.

       --try-three | --no-try-three
	   Use one of these options to tell if you allow processing of scans
	   where only three corner marks are present.

       --debug file.log
	   gives a file	to fill	with debugging information.

AUTHORS
       Alexis Bienven"ue	<paamc@passoire.fr>
	   Main	author

       Anirvan Sarkar
	   Author and Editor

       Hiroto Kagotani
	   Editor

       Fr'ed'eric	Br'eal
	   Author and Editor

       Jean B'erard
	   Translation from French

       Georges Khaznadar
	   Translation from French

COPYRIGHT
       Copyright (C) 2008-2016 Alexis Bienvenue

       This document can be used according to the terms	of the GNU General
       Public License, version 2 or later.

Auto Multiple Choice 1.3.0	  2016-03-16			AMC-ANALYSE(1)

NAME | SYNOPSIS | DESCRIPTION | AUTHORS | COPYRIGHT

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