Update README.md

README.md

@@ -3,4 +3,258 @@ license: apache-2.0
 base_model:
 - PaddlePaddle/PaddleOCR-VL
 base_model_relation: quantized
----
+---
+# deepseek-ocr.rs 🚀
+
+Rust implementation of the DeepSeek-OCR inference stack with a fast CLI and an OpenAI-compatible HTTP server. The workspace packages multiple OCR backends, prompt tooling, and a serving layer so you can build document understanding pipelines that run locally on CPU, Apple Metal, or (alpha) NVIDIA CUDA GPUs.
+
+> 中文文档请看 [README_CN.md](README_CN.md)。  
+
+> Want ready-made binaries? Latest macOS (Metal-enabled) and Windows bundles live in the [build-binaries workflow artifacts](https://github.com/TimmyOVO/deepseek-ocr.rs/actions/workflows/build-binaries.yml). Grab them from the newest green run.
+
+## Choosing a Model 🔬
+
+| Model | Memory footprint* | Best on | When to pick it |
+| --- | --- | --- | --- |
+| **DeepSeek‑OCR** | **≈6.3 GB** FP16 weights, **≈13 GB** RAM/VRAM with cache & activations (512-token budget) | Apple Silicon + Metal (FP16), high-VRAM NVIDIA GPUs, 32 GB+ RAM desktops | Highest accuracy, SAM+CLIP global/local context, MoE DeepSeek‑V2 decoder (3 B params, ~570 M active per token). Use when latency is secondary to quality. |
+| **PaddleOCR‑VL** | **≈4.7 GB** FP16 weights, **≈9 GB** RAM/VRAM with cache & activations | 16 GB laptops, CPU-only boxes, mid-range GPUs | Dense 0.9 B Ernie decoder with SigLIP vision tower. Faster startup, lower memory, great for batch jobs or lightweight deployments. |
+
+\*Measured from the default FP16 safetensors. Runtime footprint varies with sequence length.
+
+Guidance:
+
+- **Need maximum fidelity, multi-region reasoning, or already have 16–24 GB VRAM?** Use **DeepSeek‑OCR**. The hybrid SAM+CLIP tower plus DeepSeek‑V2 MoE decoder handles complex layouts best, but expect higher memory/latency.
+- **Deploying to CPU-only nodes, 16 GB laptops, or latency-sensitive services?** Choose **PaddleOCR‑VL**. Its dense Ernie decoder (18 layers, hidden 1024) activates fewer parameters per token and keeps memory under 10 GB while staying close in quality on most docs.
+
+## Why Rust? 💡
+
+The original DeepSeek-OCR ships as a Python + Transformers stack—powerful, but hefty to deploy and awkward to embed. Rewriting the pipeline in Rust gives us:
+
+- Smaller deployable artifacts with zero Python runtime or conda baggage.
+- Memory-safe, thread-friendly infrastructure that blends into native Rust backends.
+- Unified tooling (CLI + server) running on Candle + Rocket without the Python GIL overhead.
+- Drop-in compatibility with OpenAI-style clients while tuned for single-turn OCR prompts.
+
+## Technical Stack ⚙️
+
+- **Candle** for tensor compute, with Metal and CUDA backends and FlashAttention support.
+- **Rocket** + async streaming for OpenAI-compatible `/v1/responses` and `/v1/chat/completions`.
+- **tokenizers** (upstream DeepSeek release) wrapped by `crates/assets` for deterministic caching via Hugging Face and ModelScope mirrors.
+- **Pure Rust vision/prompt pipeline** shared by CLI and server to avoid duplicated logic.
+
+## Advantages over the Python Release 🥷
+
+- Faster cold-start on Apple Silicon, lower RSS, and native binary distribution.
+- Deterministic dual-source (Hugging Face + ModelScope) asset download + verification built into the workspace.
+- Automatic single-turn chat compaction so OCR outputs stay stable even when clients send history.
+- Ready-to-use OpenAI compatibility for tools like Open WebUI without adapters.
+
+## Highlights ✨
+
+- **One repo, two entrypoints** – a batteries-included CLI for batch jobs and a Rocket-based server that speaks `/v1/responses` and `/v1/chat/completions`.
+- **Works out of the box** – pulls model weights, configs, and tokenizer from whichever of Hugging Face or ModelScope responds fastest on first run.
+- **Optimised for Apple Silicon** – optional Metal backend with FP16 execution for real-time OCR on laptops.
+- **CUDA (alpha)** – experimental support via `--features cuda` + `--device cuda --dtype f16`; expect rough edges while we finish kernel coverage.
+- **Intel MKL (preview)** – faster BLAS on x86 via `--features mkl` (install Intel oneMKL beforehand).
+- **OpenAI client compatibility** – drop-in replacement for popular SDKs; the server automatically collapses chat history to the latest user turn for OCR-friendly prompts.
+
+## Quick Start 🏁
+
+### Prerequisites
+
+- Rust 1.78+ (edition 2024 support)
+- Git
+- Optional: Apple Silicon running macOS 13+ for Metal acceleration
+- Optional: CUDA 12.2+ toolkit + driver for experimental NVIDIA GPU acceleration on Linux/Windows
+- Optional: Intel oneAPI MKL for preview x86 acceleration (see below)
+- (Recommended) Hugging Face account with `HF_TOKEN` when pulling from the `deepseek-ai/DeepSeek-OCR` repo (ModelScope is used automatically when it’s faster/reachable).
+
+### Clone the Workspace
+
+```bash
+git clone https://github.com/TimmyOVO/deepseek-ocr.rs.git
+cd deepseek-ocr.rs
+cargo fetch
+```
+
+### Model Assets
+
+The first invocation of the CLI or server downloads the config, tokenizer, and `model-00001-of-000001.safetensors` (~6.3GB) into `DeepSeek-OCR/`. To prefetch manually:
+
+```bash
+cargo run -p deepseek-ocr-cli --release -- --help # dev profile is extremely slow; always prefer --release
+```
+
+> Always include `--release` when running from source; debug builds on this model are extremely slow.
+Set `HF_HOME`/`HF_TOKEN` if you store Hugging Face caches elsewhere (ModelScope downloads land alongside the same asset tree). The full model package is ~6.3GB on disk and typically requires ~13GB of RAM headroom during inference (model + activations).
+
+## Configuration & Overrides 🗂️
+
+The CLI and server share the same configuration. On first launch we create a `config.toml` populated with defaults; later runs reuse it so both entrypoints stay in sync.
+
+| Platform | Config file (default) | Model cache root |
+| --- | --- | --- |
+| Linux | `~/.config/deepseek-ocr/config.toml` | `~/.cache/deepseek-ocr/models/<id>/…` |
+| macOS | `~/Library/Application Support/deepseek-ocr/config.toml` | `~/Library/Caches/deepseek-ocr/models/<id>/…` |
+| Windows | `%APPDATA%\deepseek-ocr\config.toml` | `%LOCALAPPDATA%\deepseek-ocr\models\<id>\…` |
+
+- Override the location with `--config /path/to/config.toml` (available on both CLI and server). Missing files are created automatically.
+- Each `[models.entries."<id>"]` record can point to custom `config`, `tokenizer`, or `weights` files. When omitted we fall back to the cache directory above and download/update assets as required.
+- Runtime values resolve in this order: command-line flags → values stored in `config.toml` → built-in defaults. The HTTP API adds a final layer where request payload fields (for example `max_tokens`) override everything else for that call.
+
+The generated file starts with the defaults below; adjust them to persistently change behaviour:
+
+```toml
+[models]
+active = "deepseek-ocr"
+
+[models.entries.deepseek-ocr]
+
+[inference]
+device = "cpu"
+template = "plain"
+base_size = 1024
+image_size = 640
+crop_mode = true
+max_new_tokens = 512
+use_cache = true
+
+[server]
+host = "0.0.0.0"
+port = 8000
+```
+
+- `[models]` picks the active model and lets you add more entries (each entry can point to its own config/tokenizer/weights).
+- `[inference]` controls notebook-friendly defaults shared by the CLI and server (device, template, vision sizing, decoding budget, cache usage).
+- `[server]` sets the network binding and the model identifier reported by `/v1/models`.
+
+See `crates/cli/README.md` and `crates/server/README.md` for concise override tables.
+
+## Benchmark Snapshot 📊
+
+Single-request Rust CLI (Accelerate backend on macOS) compared with the reference Python pipeline on the same prompt and image:
+
+| Stage                                             | ref total (ms) | ref avg (ms) | python total | python/ref |
+|---------------------------------------------------|----------------|--------------|--------------|------------|
+| Decode – Overall (`decode.generate`)              | 30077.840      | 30077.840    | 56554.873    | 1.88x      |
+| Decode – Token Loop (`decode.iterative`)          | 26930.216      | 26930.216    | 39227.974    | 1.46x      |
+| Decode – Prompt Prefill (`decode.prefill`)        | 3147.337       | 3147.337     | 5759.684     | 1.83x      |
+| Prompt – Build Tokens (`prompt.build_tokens`)     | 0.466          | 0.466        | 45.434       | 97.42x     |
+| Prompt – Render Template (`prompt.render`)        | 0.005          | 0.005        | 0.019        | 3.52x      |
+| Vision – Embed Images (`vision.compute_embeddings`)| 6391.435      | 6391.435     | 3953.459     | 0.62x      |
+| Vision – Prepare Inputs (`vision.prepare_inputs`) | 62.524         | 62.524       | 45.438       | 0.73x      |
+
+## Command-Line Interface 🖥️
+
+Build and run directly from the workspace:
+
+```bash
+cargo run -p deepseek-ocr-cli --release -- \
+  --prompt "<image>\n<|grounding|>Convert this receipt to markdown." \
+  --image baselines/sample/images/test.png \
+  --device cpu --max-new-tokens 512
+```
+
+> Tip: `--release` is required for reasonable throughput; debug builds can be 10x slower.
+
+> macOS tip: append `--features metal` to the `cargo run`/`cargo build` commands to compile with Accelerate + Metal backends.
+>
+> CUDA tip (Linux/Windows): append `--features cuda` and run with `--device cuda --dtype f16` to target NVIDIA GPUs—feature is still alpha, so be ready for quirks.
+>
+> Intel MKL preview: install Intel oneMKL, then build with `--features mkl` for faster CPU matmuls on x86.
+
+Install the CLI as a binary:
+
+```bash
+cargo install --path crates/cli
+deepseek-ocr-cli --help
+```
+
+Key flags:
+
+- `--prompt` / `--prompt-file`: text with `<image>` slots
+- `--image`: path(s) matching `<image>` placeholders
+- `--device` and `--dtype`: choose `metal` + `f16` on Apple Silicon or `cuda` + `f16` on NVIDIA GPUs
+- `--max-new-tokens`: decoding budget
+- Sampling controls: `--do-sample`, `--temperature`, `--top-p`, `--top-k`, `--repetition-penalty`, `--no-repeat-ngram-size`, `--seed`
+  - By default decoding stays deterministic (`do_sample=false`, `temperature=0.0`, `no_repeat_ngram_size=20`)
+  - To use stochastic sampling set `--do-sample true --temperature 0.8` (and optionally adjust the other knobs)
+
+### Switching Models
+
+The autogenerated `config.toml` now contains two model entries:
+
+- `deepseek-ocr` (default) – the original DeepSeek vision-language stack.
+- `paddleocr-vl` – the PaddleOCR-VL 0.9B SigLIP + Ernie release.
+
+Pick which one to load via `--model`:
+
+```bash
+deepseek-ocr-cli --model paddleocr-vl --prompt "<image> Summarise"
+```
+
+The CLI (and server) will download the matching config/tokenizer/weights from the appropriate repository (`deepseek-ai/DeepSeek-OCR` or `PaddlePaddle/PaddleOCR-VL`) into your cache on first use. You can still override paths with `--model-config`, `--tokenizer`, or `--weights` if you maintain local fine-tunes.
+
+## HTTP Server ☁️
+
+Launch an OpenAI-compatible endpoint:
+
+```bash
+cargo run -p deepseek-ocr-server --release -- \
+  --host 0.0.0.0 --port 8000 \
+  --device cpu --max-new-tokens 512
+```
+
+> Keep `--release` on the server as well; the debug profile is far too slow for inference workloads.
+> macOS tip: add `--features metal` to the `cargo run -p deepseek-ocr-server` command when you want the server binary to link against Accelerate + Metal (and pair it with `--device metal` at runtime).
+>
+> CUDA tip: add `--features cuda` and start the server with `--device cuda --dtype f16` to offload inference to NVIDIA GPUs (alpha-quality support).
+>
+> Intel MKL preview: install Intel oneMKL before building with `--features mkl` to accelerate CPU workloads on x86.
+
+Notes:
+
+- Use `data:` URLs or remote `http(s)` links; local paths are rejected.
+- The server collapses multi-turn chat inputs to the latest user message to keep prompts OCR-friendly.
+- Works out of the box with tools such as [Open WebUI](https://github.com/open-webui/open-webui) or any OpenAI-compatible client—just point the base URL to your server (`http://localhost:8000/v1`) and select either the `deepseek-ocr` or `paddleocr-vl` model ID exposed in `/v1/models`.
+- Adjust the request body limit with Rocket config if you routinely send large images.
+
+![Open WebUI connected to deepseek-ocr.rs](./baselines/sample_1.png)
+
+## GPU Acceleration ⚡
+
+- **Metal (macOS 13+ Apple Silicon)** – pass `--device metal --dtype f16` and build binaries with `--features metal` so Candle links against Accelerate + Metal.
+- **CUDA (alpha, NVIDIA GPUs)** – install CUDA 12.2+ toolkits, build with `--features cuda`, and launch the CLI/server with `--device cuda --dtype f16`; still experimental.
+- **Intel MKL (preview)** – install Intel oneMKL and build with `--features mkl` to speed up CPU workloads on x86.
+- For either backend, prefer release builds (e.g. `cargo build --release -p deepseek-ocr-cli --features metal|cuda`) to maximise throughput.
+- Combine GPU runs with `--max-new-tokens` and crop tuning flags to balance latency vs. quality.
+
+## Repository Layout 🗂️
+
+- `crates/core` – shared inference pipeline, model loaders, conversation templates.
+- `crates/cli` – command-line frontend (`deepseek-ocr-cli`).
+- `crates/server` – Rocket server exposing OpenAI-compatible endpoints.
+- `crates/assets` – asset management (configuration, tokenizer, Hugging Face + ModelScope download helpers).
+- `baselines/` – reference inputs and outputs for regression testing.
+
+Detailed CLI usage lives in [`crates/cli/README.md`](crates/cli/README.md). The server’s OpenAI-compatible interface is covered in [`crates/server/README.md`](crates/server/README.md).
+
+## Troubleshooting 🛠️
+
+- **Where do assets come from?** – downloads automatically pick between Hugging Face and ModelScope based on latency; the CLI prints the chosen source for each file.
+- **Slow first response** – model load and GPU warm-up (Metal/CUDA alpha) happen on the initial request; later runs are faster.
+- **Large image rejection** – increase Rocket JSON limits in `crates/server/src/main.rs` or downscale the input.
+
+## Roadmap 🗺️
+
+- ✅ Apple Metal backend with FP16 support and CLI/server parity on macOS.
+- ✅ NVIDIA CUDA backend (alpha) – build with `--features cuda`, run with `--device cuda --dtype f16` for Linux/Windows GPUs; polishing in progress.
+- 🔄 **Parity polish** – finish projector normalisation + crop tiling alignment; extend intermediate-tensor diff suite beyond the current sample baseline.
+- 🔄 **Grounding & streaming** – port the Python post-processing helpers (box extraction, markdown polish) and refine SSE streaming ergonomics.
+- 🔄 **Cross-platform acceleration** – continue tuning CUDA kernels, add automatic device detection across CPU/Metal/CUDA, and publish opt-in GPU benchmarks.
+- 🔄 **Packaging & Ops** – ship binary releases with deterministic asset checksums, richer logging/metrics, and Helm/docker references for server deploys.
+- 🔜 **Structured outputs** – optional JSON schema tools for downstream automation once parity gaps close.
+
+## License 📄
+
+This repository inherits the licenses of its dependencies and the upstream DeepSeek-OCR model. Refer to `DeepSeek-OCR/LICENSE` for model terms and apply the same restrictions to downstream use.