Computer Vision API Platform · Now in Production

Intelligent OMR Evaluation Platform & Developer Core APIs

Enterprise-grade APIs delivering sub-200ms perspective rectification, coordinate mapping matrix automation, and secure pay-as-you-go prepaid token pricing built for scalable software applications.

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<200ms ProcessingBearer Token AuthPay-as-You-Go Tokens99.7% Precision Rate
Real-Time Bubble Detection

Perspective-Corrected Coordinate Mapping at Scale

The AURA OMR scanner applies homographic perspective transformation matrices to normalise skewed answer sheets from any capture angle, mapping each bubble region to a precise coordinate grid before classification.

  • Auto-perspective rectification — corrects camera-angle distortions before grid alignment and bubble localisation
  • Green/red bubble overlay — per-bubble correct/incorrect verdict with coordinate export in the API response payload
  • Annotated output image — S3-hosted marked sheet URL with interactive lightbox-ready pan-and-zoom matrix overlays
OMR Result — Live Detection Preview4/6 Correct
Q1
Q2
Q3
Q4
Q5
Q6
Perspective-normalised 6-question coordinate-mapped OMR gridScore: 66.67%

Every Tool Your Pipeline Needs

Modular API services purpose-built for high-throughput examination grading and document intelligence workloads.

OMR Bubble Scanner

Automated optical mark recognition with perspective correction, coordinate grid mapping, and per-bubble pass/fail scoring returned as structured JSON.

PDF Text Extraction

Deep OCR pipeline extracting structured text from scanned documents, forms, and multi-column PDF layouts with high positional fidelity.

Prepaid Token Model

Transparent pay-as-you-go pricing. Purchase token packs via secure BDT gateway — no monthly billing cycles or surprise overage charges.

Sub-200ms Latency

Optimised processing pipeline with atomic job logging, per-request error codes, and annotated output image URLs delivered in real time.

Developer-First API

Two Endpoints. Infinite Automation.

Simple multipart/form-data POST requests. Structured JSON responses within milliseconds. Authenticate with project-scoped Bearer tokens — no SDK required.

POST/api/v1/execute/omr-scanner/
POST/api/v1/execute/pdf-ocr/
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curl -X POST \
  https://api.aura.ai/v1/execute/omr-scanner/ \
  -H "Authorization: Bearer aura_live_sk_..." \
  -F "file=@answer_sheet.jpg" \
  -F "num_questions=40"

# Response
{
  "status": "SUCCESS",
  "service_module": "omr-scanner",
  "execution_time_ms": 187,
  "file_url": "https://cdn.aura.ai/scans/uuid_marked.jpg",
  "results": {
    "user_input": [
      { "question_no": 1, "ans_choice": 1, "remarks": null },
      { "question_no": 2, "ans_choice": 3, "remarks": null },
      { "question_no": 3, "ans_choice": null, "remarks": "Multiple bubbles selected" }
    ]
  }
}

Simple Pay-as-You-Go Pricing

No subscriptions. No hidden fees. Purchase token packs via the secure BDT payment gateway and start processing immediately.

Starter Pack

Ideal for prototyping and small evaluation batches

500Tokens
৳1,000 BDT
Get Started
Most Popular

Professional Pack

Optimal for production examination-grading workflows

2,000Tokens
৳3,500 BDT
Get Started

Enterprise Pack

Large-scale institutional and multi-team pipelines

10,000Tokens
৳15,000 BDT
Get Started
See full pricing details

Build Your First Integration in Minutes

Sign up free, create a developer project, generate a project API key, and start processing OMR answer sheets and PDF documents within your first session.

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