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117
Gray
Document Type: Choice: Normal, Photo, Document
Three options of document type are provided when you choose Gray as the image
type for your scanned document. Choice: Normal, Photo, Document.
Document: Choose Document if your original contains pure text or a mixture
of text and graphic since it is an optimal setting for regular business document.
When using Document, only Threshold can be adjusted.
Photo: Choose Photo if your original contains photo to reproduce your photo in
vivid grayscale image. When using Photo, no Threshold and Contrast can be
adjusted.
Normal: When using Normal, Threshold, Brightness, and Contrast can be
adjusted.
Threshold: The value ranges from 0 to 255. The default is 230. A low threshold
value produces a lighter image, and can be used to subdue backgrounds and subtle,
unneeded information. A high threshold value produces a darker image, and can be
used to help pick up faint images. Adjust the threshold setting by dragging the
Threshold sliding bar to the left or right to achieve the desired threshold setting.
Normal
Photo
Document
(Threshold: 230)
Normal
Photo
Document
(Threshold: 230)
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