Epson 1200S Bedienungsanleitung PDF herunterladen

Scanner Technical Brief—Page 1 6/07

This technical brief provides detailed information on the Image Quality, Performance, and Flexibility of Epson

Scanners.

Image Quality—Factors affecting image quality

When comparing scanners, hardware resolution and color pixel depth are two features often used to gauge

image quality. These two features are important, but there are a number of factors that determine image

quality in a scanner, such as the following: (Many of these elements will be discussed in detail in upcoming

sections of this document.)

The Epson Expression

and GT series scanners are Epson’s professional series scanners designed for excel-

lence with respect to image quality, speed, usability, versatility, and durability. These scanners include the

highest quality components.

Precision stepper motor

for high quality sub-scan

resolution

Dynamic range control

Type of lamp system used

Optic system

Optical resolution and

color bit depth

Quality of the Analog to Digital con

verter (ADC); Epson scanners have

optimum performance for minimal

noise and tight color registration.

Type of focus method

Color vs. monochrome CCD

The Epson Perfection

series scanners are designed for home and entry-level corporate and graphics arts

users, and are designed with the highest quality components in their price class.

Image Quality—Resolution

A scanner’s resolution determines the amount of data that is read by the scanner. As resolution increases, so

does the ﬁle size. Resolution is measured in a variety of ways.

1. Optical resolution: This is the actual number of pixels read by the CCD (Charge Coupled Device), which

measures the intensity of the light that is reﬂected from the image to be scanned, and converts it to an

analog voltage. If a scanner has a resolution of 600 x 2400 dpi, its optical resolution is 600 dpi, which

means that it can resolve 600 bits of data per inch.

2. Hardware resolution: Using a precision stepper motor to double-step or

quadruple-step the carriage, the scanner’s sub-scanner resolution can be

increased. For example, a scanner can have an optical resolution of 1200

dpi, but a hardware resolution of 1200 x 2400 dpi (because it double-steps

the carriage to increase the vertical resolution).

2400 dpi

1200 dpi

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Inhaltsverzeichnis

Seite 1 - Image Quality—Resolution

Scanner Technical Brief—Page 1 6/07This technical brief provides detailed information on the Image Quality, Performance, and Flexibility of Epson Scan

Seite 2 - Image Quality—Pixel depth

Scanner Technical Brief—Page 10 6/07DIGITAL ICE technology from Applied Science Fiction(ASF™) is a scanner feature that combines hardware and software

Seite 3

Scanner Technical Brief—Page 11 6/07Flexibility—Epson Smart Panel™ softwareEpson Smart Panel allows you to scan and send data directly to an assigned

Seite 4

Scanner Technical Brief—Page 2 6/07Image Quality—Resolution (cont.)3. Interpolated resolution: Interpolation is a method to increase the resolution of

Seite 5 - Image Quality—Color CCD

Scanner Technical Brief—Page 3 6/07Image Quality—Pixel depth (cont.)Key Differences42-bit, or 48-bit Internal/ 24-bit External Color Depth36-bit, 42-b

Seite 6 - Image Quality—Focus Method

Scanner Technical Brief—Page 4 6/07Image Quality—Epson ColorTrue® Imaging System (cont.)1. Hardware components: Epson scanners use a precise scan carr

Seite 7

Scanner Technical Brief—Page 5 6/073. Processing: Many Epson scanners use a custom ASIC (Application Speciﬁ c Integrated Circuit) for fast scanning. K

Seite 8 - Performance—Batch Scanning

Scanner Technical Brief—Page 6 6/07Image Quality—Dynamic RangeDynamic range measures the difference between the lightest highlights and darkest shadow

Seite 9 - Flexibility—Network Scanning

Scanner Technical Brief—Page 7 6/07Image Quality—Dual Lens SystemA unique Dual Lens System, available on some Epson scanners, automatically selects fr

Seite 10 - Flexibility—Epson Scan

Scanner Technical Brief—Page 8 6/07Performance—Batch ScanningEpson scanning software supports batch scanning: Without batch scanning, you must scan e

Scanner Technical Brief—Page 9 6/07Flexibility—Network ScanningNewer networkable Epson scanners offer the ability to connect to the network as a devic