Suya OCR API — vLLM-backed, OpenAI-compatible OCR service

FastAPI service wrapping the Surya-OCR-2 model (datalab-to) served through vLLM:
legacy /v1/api/ai/* endpoints, an OpenAI-compatible /v1/chat/completions endpoint,
a coalescing request batcher, a local OCR CLI, Docker packaging, multilingual
example outputs, and quantization/concurrency benchmarks.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

surya/input/processing.py

@@ -0,0 +1,17 @@
+from typing import List
+
+import pypdfium2
+
+from surya.settings import settings
+
+
+def open_pdf(pdf_filepath):
+    return pypdfium2.PdfDocument(pdf_filepath)
+
+
+def get_page_images(doc, indices: List, dpi=settings.IMAGE_DPI):
+    images = [
+        doc[i].render(scale=dpi / 72, draw_annots=False).to_pil() for i in indices
+    ]
+    images = [image.convert("RGB") for image in images]
+    return images