Office Applications - Canon ColorPASS-Z5000 Color Manual

5
5-3 Office applications
Office applications
The ColorPASS must receive PostScript instructions to print an image or a document.
Many applications do not create these PostScript instructions by themselves, and
instead rely on the printer driver to create them. Included in this category are most
word processors, spreadsheets, and presentation packages. These applications use
Windows Graphics Device Interface (GDI) to display and print when running under
Windows and Apple QuickDraw to display and print when running on Mac OS
computers. We refer to these GDI and QuickDraw applications as "office
applications."
All office applications handle color similarly, using the same RGB color model used for
the color monitor display. Most office applications allow you to choose colors from a
palette of preselected colors; some allow you to add new colors to the palette using a
color picker. Although some applications allow you to specify color using the CMY,
HSL, and HSV color models, these applications always send RGB color data to the
ColorPASS. (An exception to this is a CMYK EPS file placed in the document, which
is sent as CMYK data.)
When working with color in office applications, keep in mind that:
• The range of colors that can be displayed in RGB on your monitor is much larger
than the range of colors that can be printed on your copier. When you print the
document, out-of-gamut RGB colors are mapped to colors your copier can produce.
• These applications send only RGB data to the ColorPASS. You control the
rendering style of the color conversion with your selection of a CRD.
Each CRD uses a different color rendering style, and therefore has a different way of
mapping unprintable colors to the color gamut of your copier. ColorPASS color
rendering styles are described on page 1-5.