// Hacker Noon · 11 May 2026

Building a Fixed-Length CAPTCHA OCR Model With Multi-Head Classification

This article documents the design of a lightweight OCR system built to solve fixed-length numeric CAPTCHAs for authorized internal automation workflows. Instead of using a standard CRNN + CTC architecture, the author built a shared CNN backbone with six independent classification heads and learnable...

Hacker Noon

@hacker-noon · genesys

hackernoon.com

Hacker Noon@hacker-noon