{
  "id": 15324604,
  "title": "Cropping scanned answer sheets with a QR code as the anchor (Python + OpenCV)",
  "url": "https://urgent.news/2026/10/18/cropping-scanned-answer-sheets-with-a-qr-code-as-the-anchor-python",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-10-18T01:28:04.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/207studio/cropping-scanned-answer-sheets-with-a-qr-code-as-the-anchor-python-opencv-3i1"
  },
  "original_language": "en",
  "account": null,
  "summary": "I'm an elementary school teacher in Korea and I build small tools for my own grading. The slowest part was never the grading itself. It was sorting a scanner batch where pages come out shuffled, rotated, and front and back mixed up. The fix that worked: print a small QR in the corner of every sheet. It carries the exam ID, the student number and the side. Then for each scanned page: Find the QR…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}