ALLIED Vision Technologies Guppy F-503 - Manual (Page 94)

Camera interfaces
GUPPY Technical Manual V7.1.0
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• The video data for each pixel are output in 8-bit format (Packed 12-Bit
Mode: 12-bit format). Exception: Guppy F-146 (Mono8: 8-bit format,
Mono12/16: 12-bit format)
• Each pixel has a range of 256 (Packed 12-Bit Mode: 4096) shades of
gray.
• The digital value 0 is black and 255 (Packed 12-Bit Mode: 4095) is
white.
• In 12-bit mode the data output is MSB aligned (12 significant bits).
• In 16-bit mode the data output is MSB aligned (also 12 significant
bits).
Video data formats (IIDC V1.3 and AVT)
The following tables provide a description of the video data format for the
different modes:
Y (Mono) and Y (Mono16) format 
Source: IIDC V1.3 specification
Y (Mono12) format  AVT own format (Packed 12-Bit Mode)
<Y (Mono) format>
<Y (Mono16) format>
Y-(K+0) Y-(K+1) Y-(K+2) Y-(K+3)
Y-(K+4) Y-(K+5) Y-(K+6) Y-(K+7)
Y-(K+Pn-8) Y-(K+Pn-7) Y-(K+Pn-6) Y-(K+Pn-5)
Y-(K+Pn-4) Y-(K+Pn-3) Y-(K+Pn-2) Y-(K+Pn-1)
Figure 41: Y8 format [Source: IIDC V1.3]
High byte Low byte
Y-(K+0) Y-(K+1)
Y-(K+2) Y-(K+3)
Y-(K+Pn-4) Y-(K+Pn-3)
Y-(K+Pn-2) Y-(K+Pn-1)
Figure 42: Y16 format [Source: IIDC V1.3]