openpecha/uchen-ume-classification-benchmark

Uchen vs Umê — splits, benchmark, Parquet, and inference

Model: openpecha/uchen-ume-classifier

Parquet dataset

Hub: openpecha/uchen-ume-classification-benchmark

File	Rows	Columns
train.parquet	9,110	id, image_bytes, script
validation.parquet	1,000	same
test.parquet	851	same
benchmark.parquet	60	same

from datasets import load_dataset

repo = "openpecha/uchen-ume-classification-benchmark"
train = load_dataset(repo, split="train")
bench = load_dataset(repo, split="benchmark")

Training preprocess (verified in train.py)

Split	with_preprocess	without_preprocess
train	center crop	none
val	center crop	none
test	none (full page)	none

Benchmark inference should use --preprocess none for both models when comparing to the test split. Center-cropping at inference on with_preprocess inflates benchmark scores (~98% acc) because it matches val, not test.

Benchmark results (60 images, full pages, preprocess none)

Model	Accuracy	Macro-F1	AUC
without_preprocess	85.0%	0.848	0.970
with_preprocess	68.3%	0.648	0.953

Test split (867 full pages): without_preprocess 80.7% / 0.708; with_preprocess 56.1% / 0.506.

Inference

pip install -r requirements-inference.txt

Benchmark — recommended (full pages)

python inference_uchen_ume.py \
  --benchmark-dir benchmark \
  --model-repo openpecha/uchen-ume-classifier \
  --weights without_preprocess/final_model.pt \
  --preprocess none \
  --output benchmark_predictions.json

Benchmark — with_preprocess (same as training test: no crop)

python inference_uchen_ume.py \
  --benchmark-dir benchmark \
  --weights with_preprocess/final_model.pt \
  --preprocess none

Benchmark from JSON + URLs

python inference_uchen_ume.py \
  --benchmark-json benchmark/benchmark_holdout.json \
  --fetch-urls \
  --preprocess none

Single image

python inference_uchen_ume.py --image page.jpg --weights without_preprocess/final_model.pt --preprocess none

JSON manifests

• splits/train_val_test_splits.json — pages + image_url
• benchmark/benchmark_holdout.json — 60 holdout pages + image_url