pndaza/burmese-kraken-1m

Burmese Kraken 1M

A Kraken-specific binary training dataset of 897,883 rendered line images for Burmese/Pali text recognition. Stored in Kraken's native PyArrow IPC format for direct use with ketos train -f binary — no extraction or conversion needed.

Format

This is not a general-purpose image dataset. The file is a Kraken binary arrow file (PyArrow IPC) with images stored inline as PNG bytes and Kraken-specific metadata (alphabet, split counts, image mode). It loads directly into Kraken's training pipeline but won't open with standard image viewers or generic dataset loaders.

For general-purpose use (Tesseract, other OCR engines, or standard HF load_dataset), use the companion dataset: pndaza/burmese-ocr-1m, which contains the same 897,883 images as Parquet shards with a simple {image, text, image_id} schema.

Splits

split	rows
train	718,515
validation	89,625
test	89,743
total	897,883

Usage

# Download
hf download --repo-type dataset pndaza/burmese-kraken-1m burmese_kraken_1m.arrow

# Train (or fine-tune) directly — no preprocessing
ketos --workers 8 --precision 16-mixed train \
  -f binary \
  -F 0.1 \
  -B 16 \
  --lrate 0.001 \
  -N 1 --quit fixed \
  -o output \
  burmese_kraken_1m.arrow

Fine-tuning an existing model

ketos --workers 8 --precision 16-mixed train \
  -i model.safetensors \
  -f binary \
  -F 0.1 \
  -B 16 \
  --lrate 0.0001 \
  -N 1 --quit fixed \
  -o output \
  burmese_kraken_1m.arrow

Use a 10× lower learning rate (0.0001) when fine-tuning an existing model.

Notes

• Line images are rendered, not scanned. The degraded subset is intended to bridge the domain gap to real scans; it does not replace genuine scan data.
• Alphabet: 118 characters (Burmese consonants, vowels, tones, medials, digits, Pali, punctuation).