arkhabbazan/ocr-math-captcha-web

OCR Math Captcha

In-browser demo of `arkhabbazan/ocr-math-captcha`, a TrOCR fine-tune that reads short arithmetic captchas such as 26+7=? and then evaluates the expression it read.

Inference runs client-side through transformers.js on ONNX weights — there is no backend, and images never leave the browser. Weights are downloaded once and cached by the browser.

Limitations. Training data was primarily synthetic, so unseen fonts and layouts degrade accuracy. Built for short single-line expressions at 130x30, not document OCR. Use only on images you are authorized to process.