Update README.md

README.md

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 ## Rendering and Preprocessing Tips
 
-* Render PDFs to **PNG** or **JPEG** at a target longest dimension of **1280–1300 px**
+* Render PDFs to **PNG** or **JPEG** at a target longest dimension of **1540px**
 * Maintain aspect ratio to preserve text geometry
-* LightOnOCR is robust to moderate skew; heavy rotation correction is optional
 * Use one image per page; batching supported by vLLM
 
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