Epson Expression 800 Technical Brief (Scanners)

Epson Expression 800 Manual

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  • Epson Expression 800 | Technical Brief (Scanners) - Page 1
    Analog to Digital converter (ADC); Epson scanners have optimum performance for minimal with the highest quality components in their price class. Image Quality-Resolution A scanner's the light that is reflected from the image to be scanned, and converts it to an analog voltage. If a scanner
  • Epson Expression 800 | Technical Brief (Scanners) - Page 2
    , if a scanner has a hardware resolution of 1200 x 2400 dpi, and a maximum resolution of 9600 x 9600 dpi, the scanning software uses interpolation to create scanned images with resolutions greater than the hardware resolution. 4. Benefits of higher optical resolution: Higher resolution allows you to
  • Epson Expression 800 | Technical Brief (Scanners) - Page 3
    to a software aplication that supports 48-bit image Epson scanners use the Epson ColorTrue II Imaging System which is made up of three main elements (hardware, optics, and processing) and result in superior image quality with fast processing speeds. Precise scan carriage Simultaneous RGB scanning
  • Epson Expression 800 | Technical Brief (Scanners) - Page 4
    minimal color fringing Greater detail in shadows Greater detail in highlights Sharp image quality without distortion 1. Hardware components: Epson scanners use a precise scan carriage with better motors to achieve subscan resolutions that are double or quadruple the scanner's optical resolution
  • Epson Expression 800 | Technical Brief (Scanners) - Page 5
    or Macintosh processing, allowing the scanner to work with better "raw" data. Additionally, Epson scanners have a pixel optimization feature that uses the full resolution of the scanner's CCD, even scanning 600 dpi Epson Method: at a lesser resolution. The benefit of this feature is truer image
  • Epson Expression 800 | Technical Brief (Scanners) - Page 6
    series scanners use a fixed focus optics system. The newest Epson scanners have a fixed focal point just above the surface of the glass for optimized film scanning. 2. AutoFocus optics system: Epson highest-end graphic Epson automatic/manual focus arts scanners use an AutoFocus optics system that can
  • Epson Expression 800 | Technical Brief (Scanners) - Page 7
    two lenses for the desired scan resolution. Dual Lens System offers two lenses for two different resolutions. High Resolution lens Some Epson Perfection scanners offers 4800 dpi optical resolution with the High Resolution lens. Document (8.5") Film Area Guide (8") High resolution lens Super
  • Epson Expression 800 | Technical Brief (Scanners) - Page 8
    a Hi-Speed USB port on both your computer and your scanner. Performance-Batch Scanning Epson scanning software supports batch scanning:  Without batch scanning, you must scan each image separately.  With batch scanning you can define customized settings for each framed original, then capture each
  • Epson Expression 800 | Technical Brief (Scanners) - Page 9
    on the network.  Install Epson Scan Server (Windows only) on that computer.  Install the Epson TWAIN Pro Network scanner driver on all computers that will access the scanner over the network. Flexibility-Epson Scan with Epson Easy Photo Fix™ Scanning Software Epson Easy Photo Fix technology is
  • Epson Expression 800 | Technical Brief (Scanners) - Page 10
    Flexibility-Epson Scan Epson Scan software differs slightly by scanner model. Different scanners offer three of these four distinct scan modes to meet the needs of novice, intermediate, advanced, and business users.  Full Auto Mode: For the novice user-Epson Scan automatically previews the images
  • Epson Expression 800 | Technical Brief (Scanners) - Page 11
    Flexibility-Epson Smart Panel™ software Epson Smart Panel allows you to scan and send data directly to an assigned application or to the Epson photo-sharing site. You can also obtain photos and documents in digital form quickly and easily. This version of the Epson Smart Panel includes the following
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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