ALLIED Vision Technologies Guppy F-503 - Manual (Page 148)

Description of the data path
GUPPY Technical Manual V7.1.0
148
Format_7 Mode_6 By default and without further remapping use Format_7 Mode_6 for
2 out of 4 H+V sub-sampling
The different sub-sampling patterns are shown below.
Figure 85: Vertical sub-sampling (color)
Note

The image appears vertically compressed in this mode and no
longer exhibits a true aspect ratio.
Figure 86: 2 out of 4 H+V sub-sampling (b/w)
2 out of 4 2 out of 8
2 out of 4 H+V sub-sampling