Apple Mac OS X Panther Specifications download pdf (Page 20)

Checking Color Before You Print

When you select Print from the File menu, the Print dialog includes a Preview button.

Clicking this button opens your print job in Preview. If the driver for your printer

is ColorSync aware, you will see an accurate soft proof of your hard-copy output

onscreen. The soft proof uses the current profile for your printer as displayed in

ColorSync Utility. See page 7 for more information about obtaining color profiles.

The color-managed soft proof you see reflects every option that you have set in

the Print pane. This feature in Mac OS X v10.3 is a major advancement for creative

professionals, and there’s nothing that touches it in any other operating system.

Faster Printing on a PostScript Printer

In Mac OS X v10.3, printing to a PostScript printer is significantly faster and more

accurate. Traditionally, the output device handled the job of matching source image

data to the printer profile. But with Panther, your Mac can accomplish this task,

matching color and converting the file before it goes to the output device. You

harness the extreme processing power of your Mac. And ColorSync is optimized for

the dual processor Power Mac G5 and can tap both processors, resulting in a boost

in throughput.

When you print to a PostScript printer from an application that uses Quartz, the Print

dialog includes additional options under ColorSync.

The Color Conversion pop-up menu gives you two choices:

• Standard. Using this default setting, ColorSync converts the profile data before

sending it to the printer. This option is generally faster and more accurate.

• In Printer. Using this option, ColorSync converts the source data to a device-

independent color space before the print job is sent to the printer. This device-

independent space is then matched to the printer’s color space by the printer’s

PostScript interpreter. This option should be used only when printing to high-

end PostScript printers that provide their own built-in color management options.

A Technology Tour

Color Management

with Mac OS X Panther

Late binding vs. early binding

When ColorSync matches an image from

a source profile to a destination profile, or

when you apply a Quartz Filter, the actual

data for the image is modified. Every time

this happens, some information and accuracy

is lost.

One way of handling this problem is called

“late binding.”You manage the color work-

flow to stay in the RGB color space as long

as possible, possibly even handing RGB files

to the printer.

Another approach is called “early binding.”

In this case you convert the data as soon

as possible to the ultimate destination

color space and keep it there through

the workflow.

Choosing a late binding or early binding

scenario depends on the factors in your

particular circumstance. For example,

passing RGB files to your printer might be

an excellent choice if you know the printer

can convert RGB to CMYK with satisfactory

results. On the other hand, if you don’t know

who will do the printing, you should convert

your RGB data to CMYK in house before

sending the files out.

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Apple Mac OS X Panther Specifications Page 20

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