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:

       •   these names can be given as arguments,

       •   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 acurate). 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 thie case, copy numbers are allocated to
           students so that their answer sheets, with the same subject number, can be
           differenciated.

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

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

AUTHORS

       Alexis Bienvenüe <paamc@passoire.fr>
           Main author

       Jean Bérard
           Translation from French

       Georges Khaznadar
           Translation from French

COPYRIGHT

       Copyright © 2008-2013 Alexis Bienvenüe

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