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Bubble Vision: Optical Mark Reader

Project description

Extract answer choices from scanned jpg bubble forms.

Graphical User Interface


Command Line

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


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


$ pip install omr
$ pip install --upgrade omr
$ pip uninstall omr
  • Requirements
  • Dependencies (installed by pip)
  • Prebuilt binaries
    • Stand alone Windows exe (no parallel processing)

Example Validation Image


  • Windows
    • $ --help gives 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


Greg Miller

Project details

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Files for omr, version 0.0.7
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