Radiant DVMD1 Bedienungsanleitung PDF herunterladen (Seite 41)

Science Manual – Using Video Images for Fisheries Monitoring 33

Results

Approximately 60 fish were used as a subsample with which to assess the software.

Fishtick detected 75 per cent of targets and the DVMD detected 73 per cent of

targets.

5.3 Manley Hall, River Dee

Type of fish pass: Resistivity weir (Figure 15)

Power supply: Mains power available

System deployment: Validation of resistivity counter and trial deployment

Information required: Evidence of fish for comparison with resistivity data

Identification: Species level

Sizing: Possible using data collected

Cost of system hardware (not inluding image processing): below £1,000

System components

System 8 (Table 2) was used for this deployment.

Camera: One downwards-looking camera (Figure 15)

Lighting: Infrared floodlight

Recording hardware: Desktop PC with Voltek DVR card

Storage media: Two Freecom USB external hard drives (always one on site)

Image processing: Manual. No image processing software was used for the

validation of the resistivity counter. The data were also processed using Fishtick.

Results

Data were collected and used for video validation of the weir section over a number

of weeks. A subsample of five days, during which 64 fish were observed, was used

as part of the software assessment for this project. Fishtick detected 78 per cent of

the fish.

Figure 15: Manley Hall resistivity counter site showing the camera and lighting

gantry

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 74 75

Keine Kommentare

Radiant DVMD1 Bedienungsanleitung Seite 41