ocr识别pdf书签

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@user_1d9594a8/pdf-ocr-bookmarks

Add navigation bookmarks (outline/TOC) to scanned PDF documents using OCR. This skill should be used when the user asks to add bookmarks, navigation, table of contents, or outlines to a PDF that is a scanned image (no text layer). Covers the full workflow: detecting scanned PDFs, setting up Tesseract OCR with Chinese language support, OCR-reading the table of contents page, OCR-scanning all pages to locate actual section headers, and writing verified bookmarks with correct page numbers. Also handles text-layer PDFs directly without OCR.