Epson ActionScanner Guide de l'utilisateur télécharger pdf (Page 94)

B-4 Expression 636 Scanner Settings

The scanner can read up to 12 bits/pixel/color. Above

8 bits/pixel/color the scanner converts the image data to

8 bits/pixel/color and sends it to the computer. This gives much

higher quality.

To reproduce an image of more than 2 bits/pixel/color the

output device should be capable of producing the same tones.

Many displays and printers cannot do this and are limited to

monochrome without gradations, or to 8 or 16 or 256 colors.

The data format chosen also affects the amount of data necessary

for scanning and storing an image. The larger the bits per pixel

value chosen, the larger the amount of image data becomes.

Data format Monochrome Color

1 bit/pixel/color 2 grays 8 colors

2 bits/pixel/color 4 grays 64 colors

3 bits/pixel/color 8 grays 512 colors

4 bits/pixel/color 16 grays 4,096 colors

5 bits/pixel/color 32 grays 32,768 colors

6 bits/pixel/color 64 grays 262,144 colors

7 bits/pixel/color 128 grays 2,097,152 colors

8 bits/pixel/color 256 grays 16,777,216 colors

8 bits 2 bits 1 bit

1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 129 130

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Epson ActionScanner Guide de l'utilisateur Page 94