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... ]
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-dirgives the directory where data files are (see for example
              auto-multiple-choice-meptex(1)). Defaults to
              project-dir/data
--cr
            project-cr-dirgives 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-dirWhen 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
             to give the
            name of this file.files-list.txt
Some parameters for data capture may be set using the following options:
--prop
            proportionsets 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
            thresholdThis 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-redWith 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
            toldefines 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.
--multipleThis 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_idThis 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.
Use one of these options to tell if you allow processing of scans where only three corner marks are present.
--debug
            file.loggives a file to fill with debugging information.