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Bubble Vision: Optical Mark Reader

Project description

Extract answer choices from scanned jpg bubble forms.

Graphical User Interface

$ omrcmd.py

Command Line

$ omrcmd.py [options] imagedir
imagedir
Input image directory (front side). Lowest numbered image identifies the key.
–backdir=BACKDIR
Optional back side image directory
–form=FORM
Set the form string (default and only supported=”882E”)
–help
Show this help message and exit

Output

validation images
Answer bubble means and reference box fits drawn over each input image.
results.xlsx
summary
Image path, name box image, and total score for each test.
questioninfo
Answer choice counts by question. Key excluded.
scoring
Answer choice matches key (0/1). Same indices as choices. Score is 0 if key is -1.
choices
Answer choice matrix. Tests in rows and questions in columns. 0-4=A-E, -1=n/a.

Install

$ pip install omr
$ pip install --upgrade omr
$ pip uninstall omr

Example Validation Image

https://raw.github.com/GregoryCMiller/omr/master/ExampleValidation.jpg

Troubleshooting

  • Windows
    • $ omrcmd.py --help gives omrcmd.py: error: too few arguments
      • fix argument passing to “py” file associations from python %1 to python %1 %*
    • unable to find vcvarsall.bat
      • I was able to use $ easy_install Pillow when pip failed to install Pillow 2.2.1

Author

Greg Miller gmill002@gmail.com

Project details


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