Results 261 to 270 of about 90,955 (295)

Optimizing automated photo identification for population assessments

Conservation Biology
Abstract Several legal acts mandate that management agencies regularly assess biological populations. For species with distinct markings, these assessments can be conducted noninvasively via capture‐recapture and photographic identification (photo‐ID), which involves processing considerable quantities of photographic data.
Philip T. Patton, Krishna Pacifici, Robin W. Baird, Erin M. Oleson, Jason B. Allen, Erin Ashe, Aline Athayde, Charla J. Basran, Elsa Cabrera, John Calambokidis, Júlio Cardoso, Emma L. Carroll, Amina Cesario, Barbara J. Cheney, Ted Cheeseman, Enrico Corsi, Jens J. Currie, John W. Durban, Erin A. Falcone, Holly Fearnbach, Kiirsten Flynn, Trish Franklin, Wally Franklin, Bárbara Galletti Vernazzani, Tilen Genov, Marie Hill, David R. Johnston, Erin L. Keene, Claire Lacey, Sabre D. Mahaffy, Tamara L. McGuire, Liah McPherson, Catherine Meyer, Robert Michaud, Anastasia Miliou, Grace L. Olson, Dara N. Orbach, Heidi C. Pearson, Marianne H. Rasmussen, William J. Rayment, Caroline Rinaldi, Renato Rinaldi, Salvatore Siciliano, Stephanie H. Stack, Beatriz Tintore, Leigh G. Torres, Jared R. Towers, Reny B. Tyson Moore, Caroline R. Weir, Rebecca Wellard, Randall S. Wells, Kymberly M. Yano, Jochen R. Zaeschmar, Lars Bejder   +53 more
openaire   +3 more sources

The use of photo-identification for moray eel monitoring

2021
Recent studies highlighted that the moray eel contribution to ecosystems might be underestimated. Due to the difficulties in monitoring these species, their abundance is often miscalculated, and their contribution to ecosystems deemed low. Moray eels spend most of their daytime in crevices, challenging any study of these species.
openaire   +1 more source

Contour extraction algorithm for the automated photo-identification of dolphins

2021 International Workshop on Metrology for the Sea; Learning to Measure Sea Health Parameters (MetroSea), 2021
The photo-identification of individuals within an animal population is an important objective for the description of the environment itself, for studies relating to the distribution of species and their habitat-use as well as their conservation. The manual analysis of the photos collected by experts is generally very expensive in terms of time and ...
Rosalia Maglietta, Emanuele Seller, Roberto Carlucci, Carmelo Fanizza, Vito Renò, Giovanni Dimauro, Ettore Stella   +6 more
openaire   +2 more sources

Comparison of Co-segmentation Methods for Wildlife Photo-identification

2018
Wildlife photo-identification is a commonly used technique to track animal populations over time. Nowadays, due to large image data sets, automated photo-identification is an emerging research topic. To improve the accuracy of identification methods, it is useful to segment the animal from the background. In this paper we evaluate the suitability of co-
Anastasia Popova, Tuomas Eerola, Heikki Kälviäinen   +2 more
openaire   +1 more source

Photo‐Identification of Sea Otters Using Nose Scars

Journal of Wildlife Management, 2007
Abstract: We evaluated the use of naturally occurring nose scars to identify individual sea otters ( Enhydra lutris ) in Simpson Bay, Prince William Sound, Alaska, USA. We spent 520 hours over 103 days conducting photo‐identification surveys from June to August 2002 and ...
Heidi C Pearson, Randall W Davis
exaly   +2 more sources

Building a historic Texas bottlenose dolphin photo-identification catalog

2015
Image managing software such as Adobe Lightroom is a useful tool to combine older digitized analog photos and more recent digital images into a single database, allowing for the creation of digital long term photo-identification archives. Such data have the potential to provide valuable information about survival, reproduction and residency patterns of
Nina Luisa Santostasi, Silvia Bonizzoni, Giovanni Bearzi, Joclyn Bosquez, Mariana Ferreira da Silveria, Eren Marcum, Sarah Piwetz, Bernd Wursig   +7 more
openaire   +2 more sources

An affine invariant curve matching method for photo-identification of marine mammals

Pattern Recognition, 2005
Individual identification of marine mammals is of interest to marine biologists. This paper aims at the recognition of the edges associated with marine mammals whose pictures are taken under affine transformations. The introduced affine curve matching method uses the area of mismatch between a query and a database curve.
Chandan Gope, Nasser Kehtarnavaz, Gilbert R. Hillman, Bernd Würsig   +3 more
openaire   +1 more source

Integrated modeling of bilateral photo‐identification data in mark–recapture analyses

Ecology, 2013
When natural marks provide sufficient resolution to identify individual animals, noninvasive sampling using cameras has a number of distinct advantages relative to “traditional” mark–recapture methods. However, analyses from photo‐identification records often pose additional challenges.
Brett T, McClintock, Paul B, Conn, Robert S, Alonso, Kevin R, Crooks   +3 more
openaire   +2 more sources

The promise of machine learning in the Risso’s dolphin Grampus griseus photo-identification

2018 IEEE International Workshop on Metrology for the Sea; Learning to Measure Sea Health Parameters (MetroSea), 2018
Photo-identification (photo-ID) studies are strategic to fill the gap of knowledge of data deficient species such as Risso’s dolphin. Unfortunately, the photo-ID process is very time consuming and strongly depends on the user-ability. Some photo-ID algorithms are available, which can, automatically or semi-automatically, find the closest match between ...
Maglietta Rosalia, Bruno Andrea, Reno Vito, Dimauro Giovanni, Stella Ettore, Fanizza Carmelo, Bellomo Stefano, Cipriano Giulia, Tursi Angelo, Carlucci Roberto   +9 more
openaire   +2 more sources

Dolphin fin pose correction using ICP in application to photo-identification

2013 28th International Conference on Image and Vision Computing New Zealand (IVCNZ 2013), 2013
Photo-identification of dolphin individuals is a commonly used technique in ecological sciences to monitor state and health of individuals, as well as to study the social structure and distribution of a population. Uniqueness of some forms of damage sustained by the trailing edge of the dorsal fin throughout an individual's life allows it to be used to
Andrew Gilman, Ting Dong, Krista Hupman, Karen A. Stockin, Matthew D. M. Pawley   +4 more
openaire   +1 more source