От халепа... Ця сторінка ще не має українського перекладу, але ми вже над цим працюємо!
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Spirit of Math: a test scanning app for an international math contest
The Spirit of Math contest is an international math contest, written by students from grades 1-4. The students are given individual contest papers, specific to their grade level, along with a multiple choice answer sheet from which to choose their answers. This scanning app works **EXCLUSIVELY** with our contest answer sheets to tabulate a registered student’s score and compile them for that particular grade-level contest for that registered school. The scores are then transmitted to our team for verification. Once the answer sheets have been verified, the scores will be provided to the appropriate school for each student.
Screens from app
Services
Product design
UX design
UI design
Web development
Front-end
Back-end
Mobile development
iOS
Android
Technologies:
Swift
React JS
Java
C++
Machine Vision
OpenCV
Team composition:
1 iOS developer
1 Android developer
1 Front-end developer
1 QA engineer
1 Project manager
The Challenge
Secure and reliable results reporting
The overall project goal was to make the scanning and reporting process as secure and reliable as possible. This would prevent teachers from dishonestly reporting contest results in order to inflate school ratings.
A short time frame
The client reached out to us for help with platform development at short notice. NERDZ LAB had just six weeks to create a solution for iOS and Android devices.
Accurate image detection under all conditions
The scanning module had to be able to read test papers regardless of conditions such as poor lighting or print quality, or a complex image background.
Real-time PDF generation
As well as scoring answers and computing the final results, the module had to generate a web page with a printable PDF file in real-time.
THE SOLUTIONS
- A cross-platform, optimized coding solution. We built our machine vision tool in C++ and enhanced it with the Open CV library. This let us use the module on both iOS and Android systems.
- AR markers for camera positioning. We used ArUco symbols to identify test sheets and register sheet positions. Placing markers at four corners also allowed us to determine the camera perspective.
- Quality adjustment. We imported low-quality images as pattern models and adjusted them programmatically. This approach helped us speed up the scanning process to read answers regardless of the image background, lighting, and print quality.
- Fast UI rendering. We used the React JS framework for the web component, as its options for fast web page building let us instantly create a ready-to-print PDF file of test results.
DESIGN OVERVIEW
NERDZ LAB had to build a design which would:
- Meet all of the client’s requirements and expectations
- Address all the challenges of security and reliability
- Be easy to use for both students and teachers
- Be unique
The design process involved gathering client specifications, conducting market research, conducting user interviews, developing consistent user flows, and building interface components for the platform’s web and mobile elements.
Design services:
- Design discovery and research
- UX design
- UI design
Design solutions:
Design workflow
01
Business analysis
The NERDZ LAB team researched the сlient’s needs and suggested solutions to design challenges, including software and component development.
02
Discovery
We described the planned platform and analyzed its future target audience, the go-to-market strategy, and the needs of stakeholders and end-users. This stage gave us a clear product mission and vision, and project scope.
03
Information architecture
Our designers created a comprehensive view of the product’s information architecture, including its infrastructure, features, hierarchy, and app design.
04
Wireframes
NERDZ LAB built wireframes of the app and web page layouts that showed future interface elements on their relevant pages. This gave us a software structure that covered end-user needs.
05
UI/UX design
We designed a transparent and easy-to-use interface that met the needs of both students and teachers. Moreover, the team tested and reviewed all client-side components to set up and streamline UX interactions.
THE RESULTS
A scanning solution unique to the Spirit of Math contest
A superfast scanning process: 0.2 seconds per test sheet
Accurate reading and scoring of test results regardless of scanning conditions
A cross-platform machine vision module for Android and iOS
TESTIMONIAL
Nathan Langen
Spirit of Math
Nathan Langen
Spirit of Math
