Chapter 8 ISIS/TWAIN Driver Settings

[JPEG Transfer] Check Box

When this check box is selected, scanned image data is always compressed to JPEG format within the scanner for output to the computer.

Hint

•Scanned image data is output from the scanner as an uncompressed or JPEG transfer, depending on instructions from the ISIS/TWAIN driver or application program.

–With uncompressed transfer, scanned image data is output without being compressed. Therefore, if the image data is large, transfer of the data from the scanner to the computer may take a long time.

–JPEG transfer is useful for color and grayscale images, as scanned image data is JPEG-compressed within the scanner before it is output.

This reduces the size of the image data for output, so transfer time from the scanner to the computer is shortened.

•When JPEG Transfer is selected, image data from the scanner is always output as JPEG-compressed data.

–When the uncompressed saving format is selected in the application program, JPEG-compressed image data is reconverted to uncompressed data before it is transferred to the application. Image quality deteriorates as a result.

–This check box setting is ignored if the application program requests a JPEG transfer.

–Application program requests depend on the specifications of the particular program.

[Staple Detection] Check Box

Select this check box to stop feeding when the sensor detects a folded corner on a document, which occurs when an attempt is made to feed stapled documents. (See “Staple Detection Function” on p. 4-6.)

Background Color

This rotates the scanner internal background roller to select the background color (black or white) of a document. (See “Selectable Background” on p. 4-7.)

[White]

The background of documents changes to white and the black areas around scanned images are removed.

IMPORTANT

When the background color is set to [White], [Border Removal] and [Punch Hole Removal] on the [Image processing] tab sheet are disabled.

[Black]

The background of documents changes to black and the areas around scanned images become black.

Hint

You can select [Border Removal] on the [Image processing] tab sheet to remove the black areas around images.

Double Feed Detection

This function stops document transport when double feeding of document pages is detected, and enables you to select the detection method to suit the type of documents to be scanned. (See “Double-Feed Detection Function” on p. 4-5.)

[Detect by Length]

This method of double feed detection is useful for batch scanning of same-size documents. The length of the first document page fed is measured as a standard, and if a subsequent document is detected to be 1.97" (50 mm) longer (or shorter) than the standard, a double feed is judged to have occurred, and document transport is stopped.

[Detect by Ultrasonic]

This method of double feed detection is useful for batch scanning of different-size documents. When the ultrasonic sensors employed in three locations detect overlapping documents and spacing between documents, a double feed is judged to have occurred, and document transport is stopped.

Hint

Both detection methods can be used together.

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