LemurFaceID: a face recognition system to facilitate individual identification of lemurs View Full Text


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Article Info

DATE

2017-02-17

AUTHORS

David Crouse, Rachel L. Jacobs, Zach Richardson, Scott Klum, Anil Jain, Andrea L. Baden, Stacey R. Tecot

ABSTRACT

BackgroundLong-term research of known individuals is critical for understanding the demographic and evolutionary processes that influence natural populations. Current methods for individual identification of many animals include capture and tagging techniques and/or researcher knowledge of natural variation in individual phenotypes. These methods can be costly, time-consuming, and may be impractical for larger-scale, population-level studies. Accordingly, for many animal lineages, long-term research projects are often limited to only a few taxa. Lemurs, a mammalian lineage endemic to Madagascar, are no exception. Long-term data needed to address evolutionary questions are lacking for many species. This is, at least in part, due to difficulties collecting consistent data on known individuals over long periods of time. Here, we present a new method for individual identification of lemurs (LemurFaceID). LemurFaceID is a computer-assisted facial recognition system that can be used to identify individual lemurs based on photographs.ResultsLemurFaceID was developed using patch-wise Multiscale Local Binary Pattern features and modified facial image normalization techniques to reduce the effects of facial hair and variation in ambient lighting on identification. We trained and tested our system using images from wild red-bellied lemurs (Eulemur rubriventer) collected in Ranomafana National Park, Madagascar. Across 100 trials, with different partitions of training and test sets, we demonstrate that the LemurFaceID can achieve 98.7% ± 1.81% accuracy (using 2-query image fusion) in correctly identifying individual lemurs.ConclusionsOur results suggest that human facial recognition techniques can be modified for identification of individual lemurs based on variation in facial patterns. LemurFaceID was able to identify individual lemurs based on photographs of wild individuals with a relatively high degree of accuracy. This technology would remove many limitations of traditional methods for individual identification. Once optimized, our system can facilitate long-term research of known individuals by providing a rapid, cost-effective, and accurate method for individual identification. More... »

PAGES

2

References to SciGraph publications

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  • 2011-11-14. Long-Term Lemur Research at Centre Valbio, Ranomafana National Park, Madagascar in LONG-TERM FIELD STUDIES OF PRIMATES
  • 1995-10. Demography and life history of free-rangingPropithecus diadema edwardsi in ranomafana national park, madagascar in INTERNATIONAL JOURNAL OF PRIMATOLOGY
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