Epson Perfection 640U Series Product ondersteunings bulletin - Pagina 4

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Epson Perfection 640U Series Product ondersteunings bulletin

DIGITAL ICE for Photo Prints function sequence

1. Scanner lights up lamp A and scans the image.

2. Scanner lights up lamp B and scans the image.

3. Software superimposes the images obtained from each scan and determines the inconsistent area as a flaw

or debris.

4. Software then removes or fixes the inconsistent area(s) detected in step 3 and produces an image with

minimal defects.

DIGITAL ICE for Film function outline

DIGITAL ICE for Film uses infrared light for its process. Longer in wavelength than visible light, infrared light

has, as one of its properties, the ability to scan film media transparently. Hence, when a film image with dust

and/or flaws is scanned using an infrared light, the infrared light is blocked at those points where dust and/or

flaws appear, thereby providing an image with only highly visible dust and/or the flaws. By superimposing the

images scanned with infrared light and visible light, it detects the dust and/or flaws on the document and

automatically removes them using the interpolated and corrected image data near the dust and/or flaws in the

image.

DIGITAL ICE for Film function sequence

1. Scanner scans a visible-light image.

2. Scanner scans an infrared-light image.

3. Software superimposes the images obtained from each light and detects the flaws and/or the foreign

matter.

4. Software then removes or fixes the flaws and/or foreign matter detected in step 3 and produces an image

with minimal defects.

DIGITAL ICE processing speed

Scanner processing speeds with DIGITAL ICE are highly variable and depend upon a number of factors such

as:

- Host processing system configuration (CPU speed, amount of RAM, free HDD space, connection type

USB 1.1/2.0 or FireWire)

- Photo or Film type scan settings (Color or Grayscale, resolution, 16/8 bits per pixel, image size)

- Number of detected defects (amount of damage or debris on the photo/film)

Here are some examples of scan times with and without DIGITAL ICE technology over a FireWire ® IEEE -

1394 connection. Your scan times may vary, depending on your computer system and connection as

noted above.

Original photo

Resolution

4" x 6" photo

300

35mm slide

2400

35mm negative

2400

Scan time Without

DIGITAL ICE

Technology

10 seconds

1 minute

1 minute, 30 seconds

Page

PSB.2004.09.001

Scan time With DIGITAL

ICE Technology

1 minute, 40 seconds

8 minutes, 22 seconds

10 minutes, 20 seconds

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