What is the minimum resolution and file size of an image/PDF for OCR recognition to work well?

Nanonets OCR image resolution

We recommend file sizes greater than 1000x1000 pixels or, in other words greater than 1000 pixels along both height and width dimensions.

For PDFs we internally convert it to images at 300 DPI.

While we can't comment on the file size as it would depend on the specific file format.

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