Best DPI for Scanning Black-and-White Documents

Dots per inch (dpi), a standard printing measurement that is also used for digital images, are one of the resolution settings available when scanning documents using optical character recognition software (OCR).

The ideal solution for your business will depend on what it needs. The better and more readable your material is, the higher the resolution. Nevertheless, larger files associated with better resolution take up more space on hard drives and lengthen online downloads.

For instance, the typical office document will be roughly 41K in size when scanned at 200 dpi (bi-tonal). The size grows to 62K if you increase this to 300 dpi. This is not a significant difference on its own, but it adds up over the many pages of a lengthy work.

You can increase the resolution to 600 dpi for truly high-quality scanning or for text that will be printed again. But, when shared widely with a huge number of papers, file sizes and download times can be prohibitive.

Typically, 300 dpi is the ideal resolution for scanning documents in order to balance readability and file size. It facilitates reading and sharing of the document.

The dpi you select might also be impacted by font size. At 300 dpi, standard font sizes up to 10 points are acceptable. You could choose to increase the resolution to 400 dpi because smaller fonts might be tougher to see at this resolution.

Moreover, keep in mind that there are numerous file types that OCR can output to, which may effect the file size and usability of documents. They include the formats.pdf,.jpg,.png,.tiff, and.gif. Since they make it simple to convert scanned photos to text that can be modified and keyword searched, PDF documents are frequently the favored option.
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