Description

Bubble sheet multiple choice scanner and test grader using OpenCV and Python

The goal of this project is to build a bubble sheet scanner and test grader using Python and OpenCV.

To accomplish this, our implementation will need to satisfy the following 7 steps:

•  Detect the exam in an image.
•  Apply a perspective transform to extract the top-down, birds-eye-view of the exam.
•  Extract the set of bubbles (i.e., the possible answer choices) from the perspective transformed exam.
•  Sort the questions/bubbles into rows.
• Determine the marked (i.e., “bubbled in”) answer for each row.
• Lookup the correct answer in our answer key to determine if the user was correct in their choice.
• Repeat for all questions in the exam.