Operation Manual

75
TOP
The Tool Chest — Scanner Extras
Pixel Data Size
The option selected in the Scan Bit
Depth menu determines the num-
ber of bits acquired per color chan-
nel for each pixel in the image. The options available depend
on the scanner used:
• 9000 ED, 5000 ED: 16 bits, 8 bits
• COOLSCAN V ED, 8000 ED, 4000 ED: 14 bits, 8 bits
• COOLSCAN IV ED: 12 bits, 8 bits
Bit Depth, Color, and File Size
Bit Depth, Color, and File Size
Scanning at a bit depth of eight bits yields 256 shades per pixel for each
component channel of the current color model (if the image is three-
color RGB, the result is 24-bit color, which can express roughly 16.7
million different color values). The maximum bit depth depends on the
scanner connected:
• 9000 ED, 5000 ED: 16 bits (65,536 shades per channel)
• COOLSCAN V ED, 8000 ED, 4000 ED: 14 bits (16,348 shades per chan-
nel)
1
• COOLSCAN IV ED: 12 bits (4,096 shades per channel)
1
Scanning at the maximum bit depth results in larger fi les but increases
accuracy.
1
Images scanned at fourteen and twelve bits are converted to sixteen
bits when opened in the host application.
IX240 Crop Choices
The following crop choices are available
when the optional IA-20 (S) APS (IX-240)
fi lm adapter is inserted in the 5000 ED,
4000 ED, COOLSCAN V ED, or COOLSCAN
IV ED:
Crop choice Description
Classic
The size of the initial crop is adjusted for the “classic”
APS setting, with a width-height ratio the same as 35-
mm fi lm (3 : 2).
Wide
The size of the initial crop is adjusted for the “wide”
APS setting, with a width-height ratio of 16 : 9.
Panorama
The size of the initial crop is adjusted for the “panora-
ma” APS setting, with a width-height ratio of 3 : 1.