Double feed detection

A scanner function which detects the accidental feeding of multiple sheets by the ADF unit. Can be turned on or off by the operator.

Double Letter Size

A standard paper size used in the U.S.A. and othe countries. Paper size is 11 x 17 inches.

dpi

Dots per inch.

Dropout color

A color which is used in the document but does not appear in the read image.

Duplex reading mode

A reading mode in which both sides of the document are read.

Equipment Error

An error that cannot be corrected by the operator. Call CE.

Error diffusion

High-quality halftone (pseudo-grayscale) image production based on black-and-white pixel binarization. A pixel’s optical density and that of adjacent pixels are summed, with black pixels relocated in their order of density as they relate to adjacent pixels.

The purpose of this technique is to minimize the average error between read and printed densities. Den- sity data for adjacent pixels is modified by diffusing errors on the objective pixel into several pixels, which are then binarized. This maintains high grayscale levels and resolution during reading, while suppressing more patterns by dotted halftone images such as newspaper photographs.

FB

In this manual, FB means flat bed.

Filtering

A correction method that improves the read quality of handwritten documents. The read quality of images written in pencil or ball-pointed pen depends on the reflective light characteristics of the specific ink or lead used. Dropped pixels may produce outlines, gaps, or thin, barely connected lines due to uneven optical density. Filtering detects areas lighter than their surroundings and increases their density to improve image clarity.

Front-side reading = Front-side scanning

Refers to reading the front side of the document, specifically in Duplex reading mode.

Halftone processing

Any method used to reproduce a photograph which includes a shade as an image composed of dots, namely, a binary image. Dithering and error diffusion processing are examples of halftone processing.

GL-2

Page 84 Page 86
Page 85
Image 85
Fujitsu fi-4640S manual Double Letter Size
Page 84 Page 86

fi-4640S specifications

The Fujitsu fi-4640S is an advanced document scanner designed to meet the demands of high-volume scanning environments, ideal for businesses needing efficient and reliable data digitization. This model stands out with its robust build quality and a wide array of features that enhance productivity and ease of use.

One of the key features of the Fujitsu fi-4640S is its exceptional scanning speed. It can process up to 60 pages per minute, significantly reducing the time required to digitize large batches of documents. This speed is complemented by a dual-side scanning capability, allowing users to capture both sides of a page simultaneously, further increasing efficiency.

The scanner supports a variety of document types, including business cards, plastic cards, and long documents, making it highly versatile. With an automatic document feeder (ADF) that holds up to 100 sheets, users can easily load large volumes of documents and leave the scanner to complete the job without constant supervision.

Fujitsu integrates innovative technologies such as paper protection and image enhancement into the fi-4640S. The paper protection feature ensures that delicate documents are scanned without risk of damage, while the automatic deskew and cropping functions enhance image quality by correcting skewed scans and eliminating unnecessary background space. Additionally, the scanner features advanced color detection technology that optimizes the scanning process for color and black-and-white documents alike.

The fi-4640S is equipped with a high-resolution optical sensor that supports scanning up to 600 dpi, ensuring that even the finest details are captured accurately. This high resolution makes it suitable for a variety of applications, from archiving legal documents to digitizing photographs.

Software compatibility is another strong point of the Fujitsu fi-4640S. It comes bundled with a comprehensive suite of software solutions including ScandAll PRO, which facilitates easy document management, organizing, and archiving. Additionally, it supports various image file formats, providing flexibility in how scanned documents are stored and shared.

In summary, the Fujitsu fi-4640S is a feature-rich document scanner, ideal for organizations looking for high-performance scanning capabilities. Its speed, versatility, and advanced technology make it a valuable asset for any office environment, ensuring that document management tasks are streamlined and efficient.
Top Page Image Contents