Operation Manual

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)
Brightness
Adjusts the lightness or darkness of an image. The higher the value, the
brighter the image. Drag the slider to the right or left to increase or
decrease the brightness. The range is from –100 to +100.
Contrast
Adjusts the range between the darkest and the lightest shades in the image.
The higher the contrast, the bigger the different grayscale. Drag the slider to
the right or left to increase or decrease the contrast. The range is from –100
to +100.
Brightness: -50
Brightness: 0
(Normal)
Brightness: +50