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Thresholding (greyscale scanning)
If your score was scanned in grayscale (and hopefully it was), you will be able to adjust it’s relative lightness / darkness to achieve a nice balance of solid black symbols against a stark white background.
How it works …
Animation (0:39) - Tresholding
Important info for Piano
Explained step by step …
1
Use the slider inside the Threshold tool to optimize greyscale black-on-white balance. Before committing, use the Preview to confirm (rich blacks/white whites).2
Examine the notation and compare. Repeat until you see a nice balance between thick black lines against solid white background.3
Once satisfied, click OK.
NOTE …
Thickness counts for good recognition accuracy !
It’s not always necessary to apply thresholding. It’s useful only if the original scan is particularly weak or too dark.
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