For best results: keep your original scan at 600 DPI, spend 2 minutes cleaning it in PhotoScore before exporting, and plan to spend 5–10 minutes fixing errors per page in Sibelius.
Sibelius does not have a built-in "scan" button. Instead, it uses a process called . You need a separate scanning/OMR application to convert the image into a file Sibelius can read. how to scan music into sibelius