Canon EOS Rebel T1i Digital Photo Professional 3.6 for Windows Instruction Man - Page 121

Color space, CMYK simulation profiles, Rendering intent

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Color space A color space is the reproducible color range (color gamut characteristics). DPP supports the following five kinds of color space. sRGB : Standard color space for Windows. Widely used for the standard color space of monitors, digital cameras, and scanners. Adobe RGB : A wider color space than sRGB. Mainly used for printing for business purposes. Apple RGB : Standard color space for Macintosh. A slightly wider color space than sRGB. ColorMatch RGB : A slightly wider color space than sRGB. Mainly used for printing for business purposes. Wide Gamut RGB : A wider color space than Adobe RGB. Refer to the color chart below for the color area of each color space. Color chart of color spaces compatible with DPP Color range that can be seen by the human eye sRGB Adobe RGB Apple RGB ColorMatch RGB Wide Gamut RGB Gamma value 2.2 2.2 1.8 1.8 2.2 White point (color temp.) 6500K(D65) 6500K(D65) 6500K(D65) 5000K(D50) 5000K(D50) CMYK simulation profiles A profile that simulates colors when printing in a CMYK environment (printing machine, etc.). With DPP, you can simulate color with four types of profile. Euro Standard : Profile normally used for book printing in Europe, suitable for simulation of standard European printing. JMPA : Profile normally used for book printing, etc. in Japan, suitable for simulation of magazine advertising standard color printing. U.S.Web Coated : Profile normally used for book printing in North America, suitable for simulation of North American standard printing. JapanColor2001 type3 : Profile becoming a standard in the Japanese printing industry, suitable for simulation of JapanColor standard printing. Rendering intent Rendering intents are color conversion methods when printing an image. The conversion method of each rendering intent is shown below. Perceptual : Before and after conversion, all colors are converted to maintain the relationship between colors. Even where colors slightly change, you can print a natural-looking image which has maintained color harmony. However, depending on the image, the saturation may change overall. Relative Colorimetric : There will not be much conversion to colors which are similar before and after conversion, but colors which are not similar are converted appropriately. Because there are little changes to similar colors which comprise most of an image, you can print a natural-looking image in which the saturation has not changed greatly. However, depending on the image, there are cases where the overall tone of an image changes somewhat as colors which are not similar and highlights change. Introduction Contents at a Glance 1Basic Operation 2Advanced Operation 3Advanced Image Editing and Printing 4 Processing Large Numbers of Images 5Editing JPEG/TIFF Images Reference Index 120

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120
1
2
3
4
5
Introduction
Contents at
a Glance
Basic
Operation
Advanced
Operation
Advanced
Image Editing
and Printing
Editing
JPEG/TIFF
Images
Index
Processing
Large Numbers
of Images
Reference
Color space
A color space is the reproducible color range (color gamut
characteristics). DPP supports the following five kinds of color space.
sRGB
:
Standard color space for Windows. Widely used for
the standard color space of monitors, digital
cameras, and scanners.
Adobe RGB
:
A wider color space than sRGB. Mainly used for
printing for business purposes.
Apple RGB
:
Standard color space for Macintosh. A slightly
wider color space than sRGB.
ColorMatch RGB
:
A slightly wider color space than sRGB. Mainly
used for printing for business purposes.
Wide Gamut RGB
: A wider color space than Adobe RGB.
Refer to the color chart below for the color area of each color space.
Color chart of color spaces compatible with DPP
Color range that can be
seen by the human eye
Gamma
value
White point
(color temp.)
sRGB
2.2
6500K(D65)
Adobe RGB
2.2
6500K(D65)
Apple RGB
1.8
6500K(D65)
ColorMatch RGB
1.8
5000K(D50)
Wide Gamut RGB
2.2
5000K(D50)
CMYK simulation profiles
A profile that simulates colors when printing in a CMYK environment
(printing machine, etc.). With DPP, you can simulate color with four
types of profile.
Euro Standard
:
Profile normally used for book printing in
Europe, suitable for simulation of standard
European printing.
JMPA
:
Profile normally used for book printing, etc. in
Japan, suitable for simulation of magazine
advertising standard color printing.
U.S.Web Coated
:
Profile normally used for book printing in
North America, suitable for simulation of
North American standard printing.
JapanColor2001 type3
: Profile becoming a standard in the Japanese
printing industry, suitable for simulation of
JapanColor standard printing.
Rendering intent
Rendering intents are color conversion methods when printing an image.
The conversion method of each rendering intent is shown below.
Perceptual
:
Before and after conversion, all colors are
converted to maintain the relationship between
colors. Even where colors slightly change, you
can print a natural-looking image which has
maintained color harmony. However,
depending on the image, the saturation may
change overall.
Relative Colorimetric
: There will not be much conversion to colors
which are similar before and after conversion,
but colors which are not similar are converted
appropriately. Because there are little changes
to similar colors which comprise most of an
image, you can print a natural-looking image in
which the saturation has not changed greatly.
However, depending on the image, there are
cases where the overall tone of an image
changes somewhat as colors which are not
similar and highlights change.