Epson 1640SU - Perfection Photo Scanner Manuale - Pagina 3

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Image Quality—Pixel depth (cont.)

Key Differences 42-bit, or 48-bit Internal/ 24-bit External Color

How it works

Image quality

Scanner Technical Brief—Page 3

Depth

The scanner captures 42-, or 48-bit image

data, but "downsamples" an image to

24-bits, keeping the most signiﬁcant color

data.

Because the scanner captures data that

never could have been read by a 24-bit or

30-bit scanner (such as the detail in dark

areas and slight color transitions), the

scanner delivers more accurate images

36-bit, 42-bit, or 48-bit Internal and External

Color Depth

The scanner captures 36-, 42-, or 48-

bit image data and outputs all data to a

software aplication that supports 48-bit

image ﬁles (such as Adobe

With a 48-bit image ﬁle, you always have

access to full image data, which is espe-

cially important to graphic artists and

designers.

Photoshop

6/07