IBM Ricoh FB750 manual Image Control, Original, Scan Mode, Resolution

B/W Line Art

Line Art captures the image in black and white only (single-bit) with no intermediate shades of gray. Because there is very little image information that has to be stored, a LineArt scanned item takes up very storage space.

Many OCR programs require an image be scanned in Line Art. This mode is also useful for scanning documents.

B/W Halftone

Halftone is single-bit (only black and white). Halftone uses variations in dot size to simulate grayscale imaging. Some of the image detail is lost with Halftone, so it would not be as useful for photos.

Halftone is better suited to pen and ink style drawings, the details of which would be lost with a LineArt scan.

Original

Only one type of original is possible with the PowerScan: Reflective (Flatbed). The PowerScan driver does not support a transparency adapter.

Scan Mode

You can specify if you want your image to be configured for a faster scan or for a slower but higher quality scan. If the emphasis is on the quality of the completed image, choose Quality mode. If speed is more important, choose Speed.

Image Control

These features will set the size of the image as well as heavily influence the finished file size.

Resolution

The resolution of an image determines the number of dots or pixels per square inch of in image (dpi). Generally, denser pixel coverage per square inch (higher resolution) results in sharper images.

There are two types of resolution: Optical and Interpolated. Optical is the resolution that is accom- plished by the operation of the hardware; Interpolated is achieved through the software scanner driver. The resolution setting in the TWAIN interface is the Interpolated resolution.

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