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Description of the data path
MARLIN Technical Manual
V2.4.0
70
White balance
Marlin color cameras have both manual and automatic white balance. White
balance is applied so that non-colored image parts are displayed non-col-
ored.
White balance does
not
use the so called PxGA® (Pixel Gain Amplifier) of the
analog front end (AFE) but a digital representation in the FPGA in order to
modify the gain of the two channels with lower output by +9.5 dB (in 106
steps) relative to the channel with highest output.
The following screenshot is taken from the data sheet of the AFE and illus-
trates the details:
The analog color signal, coming in pulse amplitude modulation from the sen-
sor is in the form of the BAYER™ color pattern sequence. It is initially pro-
cessed in the CDS (correlated double sampler) then bypasses the PxGA before
further amplification and digitization.
From the user's point, the white balance settings are made in register 80Ch
of IIDC V1.3. This register is described in more detail below.
Figure 36: Block diagram of AFE (Source: Analog Devices)
Содержание AVT Marlin
Страница 43: ...Camera dimensions MARLIN Technical Manual V2 4 0 43 Tripod adapter Figure 17 Tripod dimensions...
Страница 63: ...Camera interfaces MARLIN Technical Manual V2 4 0 63 Figure 30 Y8 and Y16 format Source IIDC V1 3...
Страница 64: ...Camera interfaces MARLIN Technical Manual V2 4 0 64 Figure 31 Data structure Source IIDC V1 3...
Страница 87: ...Description of the data path MARLIN Technical Manual V2 4 0 87 Figure 44 Generation of shading image...