SP-20000M-PMCL / SP-20000C-PMCL
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8.8 HDR function (SP-20000M-PMCL only)
The SP-20000M-PMCL has a High Dynamic Range function which utilizes built-in sensor
characteristics. If [Exposure Mode] is set to
“
Timed
”
and then [HDR Mode] is set to “On”, the
High Dynamic Range function is activated. In this mode, it is possible to determine the input
level of knee point(s) by using the exposure time as the reference. 1 or 2 knee points can be
defined.
Setting parameters
Knee Point 1
Knee Point 2
Knee Slope 2
Knee Slope 3
Fig. 43 HDR operation
Output
Input
Concept drawing to set knee point(s)
Exposure Active
[Exposure Time]
Knee Slope 2 Time =
([Exposure Time] ÷ [Knee Slope 2]) - [Knee Slope 3 Time]
FVAL
LVAL
Knee Slope 3 Time =
[Exposure Time] ÷ [Knee Slope 3]
Knee Slope 1 Time =
[Exposure Time]
-
[Knee Slope 2 Time]
-
[Knee Slope 3 Time ]
50%
100%
120%
[Knee Point 1]
Setting Range
[Knee Point 2] Setting Range
1st Knee Point
2nd Knee Point
1/2
→
Less [Exposure Time]÷[Knee Slope 2]
Exposure
Time
Read out Time
time