User manual

Science Manual – Using Video Images for Fisheries Monitoring 9
System Comments
System 6
• Two underwater sideways cameras
opposite each other
• White board on bed of pass
• Overhead lamp (infrared or white light)
• Desktop PC with DVR card (mains
version)
OR
• Mini-ITX PC with DVR card (12v version)
• Recommended software: Fishtick
• For very wide passes, can include an
extra downward-looking camera (add
£100 to the system cost).
• This system can be used to obtain a count
if you have full coverage of the pass exit.
• The system can be used to obtain
evidence that fish are using the pass if two
sideways cameras are used, but you do
not have full coverage.
System 7
• Up to four cameras: underwater upward-
looking cameras and/or a sideways
camera next to notch
• Overhead, angled lamp(s) either infrared
or white light
• Desktop PC with DVR card (mains
version)
OR
• Mini-ITX PC with DVR card (12v system -
possible if only one lamp)
• Recommended software: Fishtick
• It may be possible to identify some
species from a combination of the image
and size information, but it will not be
possible to identify all fish.
• Sizing only feasible if you are able to
position markers within the camera field of
view (Section 2.1.2)
System 8
• Up to four overhead cameras
• Overhead infrared/white lamp(s)
• Desktop PC with DVR card (mains
version)
OR
• Mini-ITX PC with DVR card – (12v
system - possible if only one lamp)
• Recommended software: DVMD (for one
camera) or Fishtick
• It may be possible to identify some
species from a combination of the image
and size information, but it will not be
possible to identify all fish.
DVR = Digital video recorder
DVMD = Digital video motion detector