CHAPTER 4
256
Graphics
color space families, the resulting colors are expected to be rendered similarly,
regardless of the method selected for representation.
One particular color space is the so-called “standard
RGB”
or
sRGB,
defined in
the International Electrotechnical Commission (IEC) document
Colour Measure-
ment and Management in Multimedia Systems and Equipment
(see the Bibliogra-
sRGB
color space can be expressed precisely only as an
ICCBased
space, although it can be approximated by a
CalRGB
space.
ICCBased
color space for a typical three-component
RGB
space. The profile’s data has been encoded in hexadecimal representation for
readability; in actual practice, a lossless decompression filter such as
FlateDecode
should be used.
Example 4.9
10 0 obj
[ /ICCBased 15 0 R ]
endobj
15 0 obj
<< /N 3
/Alternate /DeviceRGB
/Length 1605
/Filter /ASCIIHexDecode
>>
stream
00 00 02 0C 61 70 70 6C 02
52 47 42 20 58 59 5A 20 07
00 22 00 2C 61 63 73 70 41
61 70 70 6C 00 00 04 01 00
00 00 00 00 00 00 F6 D4 00
00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00
00 00 00 09 64 65 73 63 00
72 58 59 5A 00 00 01 64 00
00 00 01 78 00 00 00 14 62
00 00 00 14 72 54 52 43 00
67 54 52 43 00 00 01 B0 00
00 00 01 C0 00 00 00 0E 77
00 00 00 14 63 70 72 74 00
64 65 73 63 00 00 00 00 00
% Color space
% ICC profile stream
00
CB
50
00
01
00
00
00
00
00
58
00
00
74
00
00
00
00
50
00
00
00
00
00
00
00
59
01
00
70
01
00
00 6D 6E 74 72
02 00 16 00 0E
4C 00 00 00 00
00 00 00 00 02
00 00 00 D3 2B
00 00 00 00 00
00 00 00 00 00
00 00 00 00 00
F0 00 00 00 71
14 67 58 59 5A
5A 00 00 01 8C
A0 00 00 00 0E
0E 62 54 52 43
74 00 00 01 D0
E4 00 00 00 27
17 41 70 70 6C