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114 Chapter 16
Settings in the Scanner Window
Image
Resolution
Choose the scanning resolution from the Resolution pop-up menu. Higher resolutions take more
memory and transfer time, but can achieve a finer scanned image.
Color Type
Black & White—Set the image Type to Black & White for text or line art. For photographic images,
set the image type to Grey (Error diffusion) or True Grey.
Grey (Error Diffusion)—is used for documents that contain photographic images or graphics. (Error
Diffusion is a method for creating simulated grey images by placing black dots in a specific matrix
instead of true grey dots.)
True Grey—also is used for documents containing photographic images or graphics. This mode is
more exact because it uses up to 256 shades of grey. It requires the most memory and longest transfer
time.