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HDR (High Dynamic Range)
When imaging scenes with bright and dark areas, it can be difficult to achieve a good
exposure. Setting the exposure for the bright areas can leave the dark areas completely
black, while setting the exposure for the dark areas can oversaturate the bright areas.
The HDR function can extend the exposure range of the camera to capture details in
both bright and dark areas within a scene.
The HDR function has two output modes: Linear mode (14-bit output) and Knee mode
(8, 10, 12-bit output)
■
How this function works
1. Take one-frame image and acquire by changing image sensor analog gain to low
and high.
2. An image captured with low gain is increased Digital Gain.
3. Two images are combined into one frame of 14bit image data.
SP-45000M-CXP4/SP-45000C-CXP4
4. Output
・
In Linear mode, the synthesized 14-bit image is output as it is.
・
In Knee mode, the synthesized 14bit image is Knee converted and output in
8bit, 10bit or 12bit image.
[HDRKneePoint], [HDRKneeSlope] can be set
Knee convert
[HDRKneePoint]
[HDRKneeSlope]
0.01
～
1 Set tilt
Imaging
Control
Light intensity
Low gain
High gain
①
②
Acquisition
Digital
Gain
X Digital Gain
Combine
Light intensity
14bit
12bit
①
②
Imaging
[HDRKneePoint] Set the value in the range of 0 to 4095 with 12-bit.
[HDRKneeSlope] Set the tilt (vertical ÷ horizontal).
