/CAD_AutoGrader

A autograder for cad drawings based on image processing

Primary LanguageC++

CAD AutoGrader

This is an autograder for CAD drawings based on image processing.

Quick Start Guide

  1. Clone this repo. This project is a Visual Studio Solution:
  • If you use Visual Studio, click CAD_Grader->CAD_Grader.sln opens the solution
  • Otherwise, all codes files are in CAD_Grader->CAD_Grader. Testing pictures are in resources/pictures Import them to the editor you are comfortable with.

  1. Install the latest version of OpenCV C++. Link it to your project if need to.

  2. Change image directories in main.cpp.

Project Structure

  • Main: main.cpp
  • Header files for constants:
    • color.h: lower and upper bound of colors in HSV for color detection
    • fields.h: all other constants
  • There are four modules, each with a cpp file and its corresponding header file:
    • COMPARE: crop, resize, get percentage difference of two images
    • HATCHING: detect hatcing lines and hatched areas of an image
    • ZHANGSUEN: zhang-suen thinning algorithm from yati-sagade
    • FEATURE_EXTRACTION: perform feature extractions if two images are not the same

Miscellanous

Since some functions I wrote have the same name as OpenCV built-in functions, it is not recommended to do using namespace in main.

Known Bugs / Unfinished Work

See Issues

  • I just got started on color detection. More colors need to be added to color.h. feature_extraction.cpp->detectColor() is the function that performs color separation.