DRC
Dynamic Range Compression has a similar effect on the picture as the above mentioned gain limit. The DRC works
by compressing the natural dynamic range of the image by taking out the darkest and lightest parts. This can be
a particular helpful setting when the light conditions are challenging. The differences should be clearly visible in
dark parts of the image, as they will become lighter/more grey as the level of DRC increases. Like the Gain Limit the
DRC will add more noise to the picture.
SAE Mode (Shutter Auto Exposure)
The shutter speed is user-adjustable in this mode. The camera automatically decides the best Iris F-stop value for an
optimal exposure setting. This setting will come with a cost. The higher the shutter speed, the more sharp the picture
become, but also the more dark the picture will be.
The shutter speed is the amount of time that each frame of the sensor has been exposed to light.
To compensate poor lighting conditions, it is possible to adjust the Gain and DRC (Dynamic Range
Compression). The DRC works by compressing the natural dynamic range of the image, taking out the darkest
and lightest parts. This can be a particular helpful setting when the light conditions are challenging. The differences
should be clearly visible in dark parts, as they will become lighter / more grey as the DRC increases.
Figure 26: Exposure > Shutter speed at 1/60 (left) and 1/500 (right)
AAE Mode (Aperture Auto Exposure)
In this mode you can set the Iris F-stop value (aperture). The higher the F-stop value, the deeper the depth of field
will become in the picture. The camera will automatically set the shutter speed based on the Iris F-stop set by
the user. As the camera determines the preferable shutter speed, it is possible to turn the anti flicker setting to the
required 50Hz or 60Hz to eliminate the effects of a shutter functioning at 1/50th of a second, for example. Like, with
the shutter speed in SAE mode, there is a cost. The higher the F-stop value, the more dark the picture become. To
compensate this you can set both the Gain Limit and the DRC.
Figure 27: Exposure > AAE with Iris F2.0 (left) and Iris F6.8 (right)
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