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Contents
Falcon4 86M Cameras
Flat Field Correction and Defective Pixel Detection
Overview
The Flat Field correction function consists of using two coefficients per pixel which correct the gain
and offset of the corresponding pixel. These corrections compensate for the Photo-response Non-
uniformity (PRNU) and Fixed Pattern noise (FPN) attributes unique to each camera sensor. In
addition, the camera supports replacement of defective pixels (hot, dead, blinking) with a value
based on neighborhood pixels.
The Flat Field correction features are grouped in the Advanced Processing category:
Correction Function Block Diagram
The following simplified block diagram shows the processing chain that is applied to the image data
(the flat field and defective pixel blocks are highlighted). Note that each processing block can be
activated and deactivated independently. For example, the FPN and PRNU coefficients can be
applied independently or together using the
flatfieldCorrectionMode.
Figure 17 Flat field and defective pixel processing
Dark Row Subtract Algorithm
The dark row subtract algorithm can be enabled, disabled, or set to off. The camera ships from the
factory with this feature enabled.
This algorithm improves the time stability of the FPN output from the sensor. The Dark Row
Subtract Mode Feature has 3 modes: Off, Disabled, Enabled.
