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

AlexisBienvenüe <paamc@passoire.fr>
           Main author

       AnirvanSarkar
           Author and Editor

       HirotoKagotani
           Editor

       FrédéricBréal
           Author and Editor

       JeanBérard
           Translation from French

       GeorgesKhaznadar
           Translation from French

       Copyright © 2008-2022 Alexis Bienvenüe

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

Auto Multiple Choice 1.6.0                         2023-02-06                              AUTO-MULTIPLE-CHOI(1)

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

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

       --crproject-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).

       --projetproject-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-fichiersfiles-list.txt to give the name of this file.

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

       --propproportion
           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-thresholdthreshold
           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-marquetol
           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-allocatecopy_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.

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

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

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