AUTO-MULTIPLE-CHOI(1) Auto Multiple Choice AUTO-MULTIPLE-CHOI(1)
NAME
auto-multiple-choice-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 auto-multiple-choice analyse command performs automatic data
capture from scans of completed answer sheets of an AMC multiple choice
questionnaire. Before calling auto-multiple-choice analyse, auto-
multiple-choice-prepare(1) should have been called to make working
documents (--mode s) and the layout should have been processed with
auto-multiple-choice-meptex(1).
--data data-dir
gives the directory where data files are (see for example auto-
multiple-choice-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 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 Bienvenüe <paamc@passoire.fr>
Main author
Anirvan Sarkar
Author and Editor
Hiroto Kagotani
Editor
Frédéric Bréal
Author and Editor
Jean Bérard
Translation from French
Georges Khaznadar
Translation from French
COPYRIGHT
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)
Generated by dwww version 1.15 on Sat Jun 29 02:19:32 CEST 2024.