Broadband Fish Identification of Great Lake Fishes Patrick Simpson and Mike Tuohey Scientific Fishery Systems, Inc. Anchorage, AK Guy Fleischer and Ray.

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Presentation transcript:

Broadband Fish Identification of Great Lake Fishes Patrick Simpson and Mike Tuohey Scientific Fishery Systems, Inc. Anchorage, AK Guy Fleischer and Ray Argyle Biological Resources Division - U.S. Geological Survey Great Lakes Science Center Ann Arbor, MI

Overview Why Broadband Sonar? System Overview Data Collection Classification Results Future Work

Broadband vs. Narrowband

Benefits of Broadband Fish Identification Full-Column Assessment Continuous Assessment Remote Assessment Cost Savings

Broadband Sonar Fish Identification System Prototype

Broadband Transducer Resonant Frequency 153,600 Hz 3 dB Operation Band45 kHz ( kHz) Q=3.4 Active Surface177-mm disc Beam Pattern4.1° beamwidth, 20 dB Rated Power80 W transducer & wet electronics Source Level216 dB re kHz Transmit Sensitivitypeak TVR of 181 dB re kHz Receive Sensitivitypeak OCVR of -180 dB re kHz

Processing Platform Mid-tower computer case with 230 W power supply Plato motherboard with ISA/PCI bus adapters, 256 kByte cache Intel Pentium 90 MHz CPU with 16 Mbyte DRAM PCI SCSI-2 host adapter controlling three SCSI-2 devices below 1.0 GB hard disk, 1.3 GB magneto-optical drive, and quad-speed SCSI-2 CD-ROM 12 bit 770 kS/s ADC/DSP card with 486DX2/66 and 4 MB on-board DRAM 1280 x 1024 video monitor and video adapter card with 2 MB DRAM DOS 6.22 running ORCA.EXE Interface & Processing

Data Processing ACOUSTIC RECEIVER A/D CONVERSION ECHO DETECTION FEATURE EXTRACTION CLASSIFICATION MAN- MACHINE INTERFACE SIGNATURE DATABASE

Features Single Ping Parameters Multiple Ping Parameters Environmental Parameters

Neural Net Classifier o o o F A F B F C Hidden Nodes Input Nodes Output Nodes a 1 a 2 a 3 a n b 1 b 2 b 3 b p c 1 c 2 c 3 c m Features Classes

Tethered Individual Fish

Free-Swimming Fish

Tethered Data Collection

Classification Results

Tethered Vs. Free-Swimming Results

Future Work Wider Beam (15 degrees) Dual / Split Beam Greater Source Level Streamline Data Storage and Analysis More Data Collection

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