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We offer three types of OCR strategies - Auto, All and Off. This section details the differences between each strategy, and when a specific strategy should be used. 
type OCRStrategy = "Auto" | "All" | "Off";

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Auto

The Auto strategy was made to optimize for speed without sacrificing on quality. By default - it will carry out OCR on all Picture and Table segment_type. For other segment types - it will only perform OCR if a text layer doesn’t exist.

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All

This will perform OCR on all segments.

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Off

No OCR will be performed. This is useful if you only want to use the existing text layer and will reduce processing time significantly.