Omron F250-UME Software Manual page 45

Basic Operations
1-6-1-4 Frame/Field
The Frame/Field function is used to select the unit for one image. Normally, it
is sufficient to use the default setting of Frame.
If the unit is changed to Field, the resolution in the vertical direction is halved
but the image input time is reduced, allowing faster processing.
Field images
Even
Resolution: 512 × 242 (H × V)
Frame image
Resolution: 512 × 484 (H × V)
This section gives an outline only. Refer to 2-1 Inputting Camera Images for
details on Frame/Field.
Odd
Images showing alternate fields
Resolution: 512 × 242 (H × V)
One frame image is created when
two field images are combined.
Section 1-6
1-(37)