A complete answer sheet recognition system

Good morning , I am Lao Bei , official account 「GitHub Point north 」 Will recommend GitHub Useful projects on , Tap the value of open source , Welcome to your attention .

Today I want to recommend an open source answer card recognition system , Come and have a look if you need it .

Project introduction

OpenCV It's based on BSD The license （ Open source ） Distributed cross-platform computer vision library , It provides a series of general algorithms for image processing and computer vision . It is a very good tool to study image processing technology . The first contact was 2016 Because the company project needs , But what was available online at that time demo It's too little , And it's basically based on C、C++ Realized . That is from 2017 Year begins , About java+opencv More and more information has been collected . In this situation , Just want to build a platform that will help us learn and understand opencv A platform for . So there's this system . Start with installation , Learn to record with you OpenCV Knowledge about , Until finally a simple but complete DEMO The implementation of the （ Answer card recognition ）.

Software architecture

SpringMVC+AdminLTE 2+maven. Considering the previous demo test , Or it's all about creating images to view , Either use swing draw , When the parameters change , Not easy to debug , So it's a familiar one web Pattern . Backstage is based on SpringMVC, And there's no database interaction , Is a page operation effect real-time view function , Now it's very simple . The front end uses AdminLTE 2, One is based on bootstrap Lightweight background template for .

primary coverage

• Image binarization
• The image can be binarized by itself
• Gaussian blur
• Picture zoom
• Corrosion expansion
• Advanced morphological transformation
• edge detection
• Detect lines
• Detection circle
• Detect color
• Contour recognition
• Template search
• Draw a gray histogram
• Answer card recognition demo

Results the preview

Source code address

And no. GitHub Point north The background to reply Answer sheet Get the source address .