Offset/Gain Control Details (On-Semi Python Sensors); On-Semi Python Sensors Gain Stage Diagram - Teledyne m640 User Manual

Offset/Gain Control Details (On-Semi Python sensors)

The Gain and Black level functions are applied at the sensor and/or on the digital image values
output by the sensor, as described below.
Gain Selector = Sensor Analog: The gain function is a linear multiplier control in 0.01 steps
•
within the sensor hardware (Gain range is "1-8", which is a +18dB gain).
Gain Selector = Sensor Digital: The gain function is a linear multiplier control in 0.01 steps
•
within the sensor hardware (Gain range is "1-31.99", which is +30dB gain).
Important: Digital noise increases linearly and quickly with higher gain values. Users should
•
evaluate image quality with added gain.
Gain (Raw): Shows the raw sensor control for each gain stage or an alternative method to
•
control sensor gain.
Black Level: This offset variable exists within the sensor. The On-Semi sensors allow an offset
•
range between 0 and 255 DN. The factory settings default value for each sensor used by
various Nano models, is recommended as per the sensor manufacturer design specifications.
Note: With the factory default offset, testing a camera's black output in 8-bit mode may show
a 2 DN value difference across the image. Changing the Black Level value up or down will push
sensor noise (present at the sensors native bits per pixel) to fall within one 8-bit value, thus the
noise becomes hidden.

On-Semi Python Sensors Gain Stage Diagram

On-Semi Sensor Gain Stages
Analog
Analog Gain Control
70 • Operational Reference
Black Level
Control
Digital Gain Control
Digital
Post Digital Gain Control
Digital
Nano Series GigE Vision Camera