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19.4 Working with HDR (High Dynamic Range Control) 165
19.4.2 Adjusting sensor -x02d (-1012d)
19.4.2.1 Introduction
The HDR (High Dynamic Range) mode of the Aptina sensor increases the usable contrast range. This is achieved
by dividing the integration time in three phases. The exposure time proportion of the three phases can be set
independently.
19.4.2.2 Functionality
To exceed the typical dynamic range, images are captured at 3 exposure times with given ratios for different expo-
sure times. The figure shows a multiple exposure capture using 3 different exposure times.
Figure 1: Multiple exposure capture using 3 different exposure times
Note
The longest exposure time (T1) represents the Exposure_us parameter you can set in wxPropView.
Afterwards, the signal is fully linearized before going through a compander to be output as a piece-wise linear signal.
the next figure shows this.
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