cf-docuvision

Document parsing service for CircuitForge products. Parses scanned documents, PDFs, forms, and receipts into structured elements (headings, paragraphs, tables, figures) using Dolphin-v2 (ByteDance, Apache 2.0).

Status: v0.1.0 — production-ready for single-page documents.

---

Prerequisites

Hardware

GPU VRAM	Result
16GB+	Recommended — fast single-page parsing (1–3 seconds)
8GB	Minimum — works for most documents
Under 8GB	Likely CUDA out-of-memory on model load
CPU only	Works — expect 60–120 seconds per page

If you are on CPU or have limited VRAM, set CF_DOCUVISION_DEVICE=cpu before starting. The service logs a warning and continues — CPU fallback is slow but functional.

Model download

First startup downloads approximately 5–8 GB from HuggingFace. Subsequent runs use the local cache. No HuggingFace account required (model is Apache 2.0, not gated).

To speed up large downloads:

pip install hf-transfer
export HF_HUB_ENABLE_HF_TRANSFER=1

---

Quick start (Docker Compose)

git clone https://git.opensourcesolarpunk.com/Circuit-Forge/cf-docuvision.git
cd cf-docuvision
cp .env.example .env    # edit if needed
docker compose up -d

Watch model load progress:

docker compose logs -f cf-docuvision

The service is ready when logs show cf-docuvision: ready. Confirm:

curl http://localhost:8003/health
# {"status": "ok", "model": "ByteDance/Dolphin-v2"}

---

Direct Python run

pip install -r requirements.txt
CF_DOCUVISION_DEVICE=cuda uvicorn app.main:app --host 0.0.0.0 --port 8003

CPU fallback:

CF_DOCUVISION_DEVICE=cpu uvicorn app.main:app --host 0.0.0.0 --port 8003

---

Configuration

Variable	Default	Description
CF_DOCUVISION_MODEL	ByteDance/Dolphin-v2	HuggingFace model ID or local path
CF_DOCUVISION_DEVICE	auto	cuda, cpu, or auto (GPU if available)
CF_DOCUVISION_PORT	8003	Service port (Docker Compose only)

To skip HuggingFace download, set CF_DOCUVISION_MODEL to a local directory:

# Optional: uncomment the volume mount in compose.yml
# - /Library/Assets/LLM/dolphin-v2:/models/dolphin-v2:ro
CF_DOCUVISION_MODEL=/models/dolphin-v2

---

Connecting from a product

Set CF_DOCUVISION_URL in the product's .env:

CF_DOCUVISION_URL=http://localhost:8003

Products using cf-core's DocuvisionClient pick this up automatically.

Kiwi note: Kiwi v0.10.x gates the docuvision call on CF_ORCH_URL — CF_DOCUVISION_URL is not yet read directly. Fix is tracked at kiwi#150. Once that ships, set CF_DOCUVISION_URL in Kiwi's .env and leave CF_ORCH_URL unset.

---

API reference

GET /health

Returns 200 when the model is loaded and ready.

{"status": "ok", "model": "ByteDance/Dolphin-v2"}

Returns 503 while the model is still loading at startup.

POST /extract

Parse a document image into structured elements.

Request:

{
  "image_b64": "<base64-encoded image bytes (JPEG, PNG, TIFF)>",
  "hint": "auto"
}

hint controls extraction focus:

Value	Behaviour
auto	General parsing — balanced detection of all element types (default)
table	Prioritise HTML table rendering
text	Prioritise text content and heading hierarchy
form	Prioritise form fields and key-value pairs

Response:

{
  "elements": [
    {"type": "heading", "text": "Invoice", "bbox": [0.05, 0.02, 0.9, 0.08]},
    {"type": "paragraph", "text": "Due date: 2026-07-01", "bbox": [0.05, 0.10, 0.6, 0.14]}
  ],
  "tables": [
    {"html": "<table>...</table>", "bbox": [0.05, 0.20, 0.95, 0.60]}
  ],
  "raw_text": "Invoice\nDue date: 2026-07-01\n...",
  "metadata": {
    "source": "cf-docuvision",
    "model": "ByteDance/Dolphin-v2",
    "hint": "auto",
    "elapsed_ms": 1240
  }
}

Element types: heading, paragraph, list, table, figure, formula, code.

bbox values are normalised to [0, 1] relative to the image dimensions.

---

Troubleshooting

CUDA out of memory at startup Dolphin-v2 requires ~8GB VRAM. Set CF_DOCUVISION_DEVICE=cpu to use CPU mode instead.

503 Model not loaded on first request The model is still loading. Watch logs for cf-docuvision: ready before sending requests. The Docker healthcheck waits up to 120 seconds.

Very slow processing CPU mode is expected to take 60–120 seconds per page. This is normal. If you need speed, a GPU is required.

trust_remote_code=True warning Dolphin-v2 requires trust_remote_code=True for its custom architecture. The model is Apache 2.0 and auditable at huggingface.co/ByteDance/Dolphin-v2.

---

License

• cf-docuvision service: MIT — CircuitForge LLC
• Dolphin-v2 model: Apache 2.0 — ByteDance