Table 3.8 (Continued)
Transformation
between sRGB
8 bit values ( |
The resulting sRGB(8) shall be limited to range from 0 to 255. For N bit/channel encoding:
The resulting sRGB(8) shall be limited to range from 0 to |
Transformation from bg-sYCC values to CIE 1931 XYZ values |
10 bit/channel encoding shall be the default bg-sYCC encoding bit depth. Other bit depths may be unsupported for general use. For 10 bit/channel encoding:
For N bit/channel encoding greater accuracy is required, i.e. for 16 bit/channel:
The nonlinear values are than transformed into CIE 1931 XYZ values |
Transformation
from CIE 1931 XYZ
values to bg-sYCC
values ( |
The
relationship between non-linear
and
For 10 bit/channel encoding (WDC = 1023, KDC = 0, range = 1023/2, offset = 512):
The
resulting
10 bit/channel encoding shall be the default bg-sYCC encoding bit depth. Other bit depths may be unsupported for general use. For N bit/channel encoding (N > 10)
|
)
and bg-sRGB
10 bit values (
)
)
is defined as follows:
values shall be limited to range from 0 to 1023
Table 3.8 (Continued)
|
The
resulting
The
maximum luminance of the achromatic axis of
The minimum luminance of the achromatic axis of is equal to 0. |
IEC 61966-2-2 3.12 scRGB |
|
Transformation
from CIE 1931 XYZ
values
to 16 bit scRGB
values
|
|
Transformation
from 16
bit scRGB
values
|
|
Transformation
from 16
bit scRGB
values
|
If
else
if
else
if
else
|
Transformation
from 8 bit sRGB
values
|
If
|
values shall be limited to a range from 0 to
is equal to 1.
to
CIE 1931 XYZ
values
to
8 bit sRGB
values
to
16 bit scRGB
values
Table 3.8 (Continued)
|
else
|
|||||
Nonlinear encoding in 12 bit for scRGB: scRGB-nl and its YCC transformation: scYCC-nl |
if
if
if
12 bit non-linear version of scRGB-nl:
Quantization for 12 bit non-linear of scYCC-nl:
Note that this quantization leads to the following relationships, where a value of 65535 in scRGB(16) is equivalent to 7.4999 in scRGB and 4080 in scRGB-nl. This is to ease computational implementations. Quantization relationships using scRGB |
|||||
|
|
|
|
|
|
|
N/A |
-0.6038 |
-0.8000 |
0 |
|||
0 |
-0.5 |
-0.7354 |
83 |
|||
2048 |
-0.25 |
-0.5371 |
337 |
|||
4096 |
0 |
0.0000 |
1024 |
|||
12288 |
1 |
1.0000 |
2304 |
|||
20480 |
2 |
1.3533 |
2756 |
|||
28672 |
3 |
1.6125 |
3088 |
|||
36864 |
4 |
1.8248 |
3360 |
|||
45056 |
5 |
2.0080 |
3594 |
|||
53248 |
6 |
2.1708 |
3803 |
|||
61440 |
7 |
2.3184 |
3992 |
|||
65535 |
7.4999 |
2.3876 |
4080 |
|||
N/A |
7.5 |
2.3877 |
4080 |
|||
N/A |
7.5913 |
2.4000 |
4096 |
|||
|
||||||
then
then
then
