Brother PDS-5000F User Manual page 76

Scan (Macintosh)
Conversion Methods
Error Diffusion

Document Type (Gray mode only)
When you select Gray as the image type for your scanned document, you can choose from three
document types:
Document Type
Document
Photo
Normal
Document
(Threshold: 230)
Description
Select Error Diffusion for a type of Halftone. Error Diffusion results in good image
texture and makes text in images more legible than Halftone 1-5 above.
Halftone
Description
Select Document if your original contains only text or a mixture of text and graphics.
This is the optimal setting for regular business documents.
Select Photo if your original contains a photograph, to reproduce it in a vivid grayscale
image.
Select Normal to adjust Brightness and Contrast manually.
Photo
Diffusion
Normal
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