GigE VA Series User Manual page 58

Mono 12
With the camera set to Mono 12, the pixel data output is 12 bit monochrome, unsigned and unpacked type.
This type is divided into two bytes when 12 bit pixel data are stored in the frame buffer. 8 bits of pixel data will be
stored in Byte 0 and the rest 4 bits will be stored in Byte 1. The rest 4 bits of Byte 1 will not be used.
Mono 12 Packed
With the camera set to Mono 12 Packed, the pixel data output is 12 bit monochrome, unsigned and
GigE Vision-specific packed type.
This type will be divided into three bytes when 24 bit pixel data are stored in the frame buffer.
8 bits of pixel data 0 will be stored in Byte 0 and the rest 4 bits will be stored in Byte 1. 8 bits of pixel data 1 will
be stored in Byte 2 and the rest 4 bits will be stored in Byte 1.
11 10 9 8 7 6 5 4
MSB
4-bit
X X X X 11 10 9 8
Byte 1
Figure 9.15 Mono 12 Format
Pixel Data 1
8-bit
4-bit
3 2 1 0
Byte 2
Figure 9.16 Mono 12 Packed Format
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Pixel Data
LSB
8-bit
7 6 5 4 3 2 1 0
Byte 0
Pixel Data 0
4-bit
3 2 1 0 11 10 9 8 7 6 5 4
Byte 1
VA GigE series
LSB
8-bit
Byte 0
RA14-131-003