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Understanding scanner technology
From Full Auto Mode (ideal for the first time user), to descreening filters and text enhancement, our range of TWAIN-compliant business scanners features the latest innovations to ensure high quality, cost effective results for all scanning applications.
TWAIN

TWAIN is a key industry standard interface used to transfer images from scanners and digital cameras directly into applications which can make use of this data, such as Adobe® Acrobat®. Prior to TWAIN, you had to scan an image with the scanner’s own proprietary software, save it, and then import the image into another application. All Epson business scanners are TWAIN-compliant.

more about TWAIN

 

ISIS® (Image and Scanner Interface Specification)

This industry standard interface for image scanning technologies was originally developed by Pixel Translations in 1990. Now supported by a large number of application and scanner vendors, and rapidly becoming a de facto industry standard, ISIS allows application developers to build very complex image capture systems quickly and reliably using any ISIS certified driver. All Epson business scanners are supplied with an ISIS driver either as standard, or as an option.

more about ISIS®
 

Advanced Auto Focus
Advanced Auto Focus enables you to achieve pinpoint focus within a range of up to 6mm above the original glass window. The auto focus optics system automatically adjusts and focuses for clearer, sharper scans and also includes a full manual facility.
 

Automatic Document Feeder (ADF)
This feature enables multiple pages to be loaded and then automatically fed into the scanner, one page at a time, allowing you to scan multiple-page documents without having to manually replace each page. Document feeders are described by speed (in pages per minute or ppm) and capacity (usually ranging from 10 sheets to 200). ADFs are essential for high-volume scanning.
 

Automatic Document Size Detection
On Epson’s A3 business scanners, six sensors auto detect A4 portrait and landscape and A3 original when scanned from both the ADF and flatbed. This simplifies scanning and saves time by eliminating the need to change document settings prior to each scan.
 

Full Auto Mode
In Full Auto Mode, scanning is quick and easy with no need to change any complex settings. The software recognises the document source and type, and performs a scan. Pictures that are not squared-up are automatically straightened, and the scanner automatically optimizes the exposure of the image. If you have more than one item on the glass, Full Auto Mode recognises this and will perform as many scans as images present.
 

Optical Character Recognition (OCR)

OCR software converts the scanned image to text that can be edited on your PC or MAC. It enables a scanned document to be stored, retrieved, distributed and used like any word processed file. Scanning with OCR means that paper documents can be archived and distributed easily within your organisation.

more about archiving and OCR
 

Epson Scan 2.9 software
This TWAIN-compliant software is bundled with all Epson business scanners, and offers a wide range of scan settings for Home, Office and Professional scanning levels. High level settings include colour calibration, descreening filter and a text enhancement function based on ADE (Automatic Document Enhancement). Scan formats offered as standard include BITMAP (.bmp), JPEG (.jpg), TIFF (.tif), Multi-TIFF (.tif) and PDF (.pdf).
 

Automatic Document Enhancement (ADE)

Epson’s Automatic Document Enhancement (ADE) software intelligently sharpens text and removes unintended background shadow to offer users a clean document for easy reference and future reproduction. ADE is especially useful for scanning two-sided lightweight paper, ensuring that archived documents are as good as the original copy.

Automatic Document Enhancement
 

Descreening Filter
The array of dots used in the magazine halftone printing process is called a screen. In a scanned image, moiré patterns are caused by interference between two sets of fine pattern grids, the scanner samples and the halftone screen in the original image. Epson’s scanner driver software has descreening filters that will greatly minimise moiré patterns in the scanned image. Descreening filters have selectable parameters to match the screen frequency of the original image halftone (such as newspaper or magazine).
Descreening Filter
 

Resolution
Resolution describes the level of detail of a printed image, and can be expressed in dots per inch (dpi). Higher resolution means more image detail, and hence better image quality but a bigger file size. Document scanning requires a resolution of only 150-600dpi, whereas scanning photographs requires a higher resolution to capture the image detail.
 

Colour depth

Colour depth describes the number of bits used to represent the colour of a single pixel in a digital image. Higher colour depth gives more accurate colour reproduction, smoother gradations between colours and detailed shadows and highlights in the scanned image.

 

Scan mode Number of colours recognised

Bi-level
(1 bit per pixel)

21 = 2 colours (black & white)

8-bit grey scale

28 = 256 shades of grey

10-bit grey scale

210 = 1024 shades of grey

8-bit colour
(indexed colour)

28 = 256 colours

24-bit RGB
(8 bits per pixel, per colour)

224 = 16.7 million colours

30-bit RGB
(10 bits per pixel, per colour)

230 = over 1 billion colours

36-bit RGB
(12 bits per pixel, per colour)

236 = over 68 billion colours

42-bit RGB
(14 bits per pixel, per colour)

242 = over 4 trillion colours

48-bit RGB
(16 bits per pixel, per colour)

248 = over 250 trillion colours
 

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