Roland ColorChoice Ver. 4.5 - Manual (Page 26)

ICC Input Profile
Input profiles are used to convert the image into a neutral color space. Once the image is in a neutral color
space, the output profile is used to convert the image into the color space of the output device. To add an ICC
input profile from another source, click the Add button. Three types of ICC input profiles can be specified:
CMYK ICC Input Profile
The CMYK input profile applies to all elements of a job that are in CMYK color mode. If your image is in
the CMYK color mode, then your file was previously separated for output to a specific output device.
Whenever is possible, use the profile used for separation in your design application as the CMYK input
profile. Try using similar profiles or profiles for common ink sets (such as CMYK SWOP, or High End
SWOP) if you do not have the matching profile. If you are trying to match Pantone colors, it may also be
appropriate to select High End SWOP as your CMYK input profile, because Pantone Process CMYK
values were designed for output to the SWOP ink set.
RGB ICC Input Profile
The RGB ICC input profile applies to all elements of a job that are in RGB color mode. An RGB input
profile can be for either a monitor or a scanner. If you scanned your file without color correcting it, it is
best to select your scanner calibration as the RGB input profile. If you have done any on-screen color
correction, you should select your monitor as the RGB input profile. If you do not have a monitor profile,
it is generally safe to select the default ICC input profile. The Generic profile assumes that you have a
Trinitron monitor with a temperature of D65 and a gamma of 1.8. Selecting the correct RGB source will
insure that the RGB data you see on-screen will be matched to the output printer.
Gray ICC Input Profile
The Gray ICC input profile applies to all elements of a job that are in Grayscale color mode. This may
refer to either a grayscale scanner or a grayscale monitor.
ICC Output Profile
ICC Output Profile
Output profiles are created for the combination of ink, media, resolution and dither type of your output
device. When selecting a profile, be sure to select the profile that matches these criteria. For output
devices that print at multiple resolutions, RIP Software provides profiles for each of those resolutions.
Choosing a profile with the wrong resolution will severely affect the output quality. Profiles with different
dither types will not greatly affect your output; however, they may cause slight shifts in color. To add an
ICC output profile from another source, click the Add button. Click the Info button for information
pertaining to the ICC output profile that has been chosen under Profile.
Bitmap/Vector Rending Intent
Before a file can be RIPed, its ICC profile must be selected so that the RGB color space of the file can
be mapped or translated into to CMYK colorspace. How the colorspace gets mapped is determined by
the color rendering intent that you select. The rendering intent selected in the Bitmap rendering field will
be applied to bitmap images in your job file. The rendering intent selected in the Vector rendering intent
field will be applied to vector objects in your file. Choose from one of the following rendering intents:
Perceptual
This intent is best for photographic images. Colors outside of the output device's gamut are either
clipped or compressed to fit the output device’s color space
Relative Colorimetric
This intent is best for images, such as logos, where the original image needs to match the output.
Colors that fall outside of the output device's gamut are clipped. This method may reduce the total
number of colors available. The white point of Relative Colorimetric is always zero.
Saturation
This intent is best for graphic images, such as vector art, where vivid colors are more important
than true color matching. Colors outside of the output device's gamut are mapped to colors at the
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