title: Automated otolith image classification with multiple views: an evaluation on Sciaenidae.
abstract: Combined multiple 2D views (proximal, anterior and ventral aspects) of the sagittal otolith are proposed here as a method to capture shape information for fish classification. Classification performance of single view compared with combined 2D views show improved classification accuracy of the latter, for nine species of Sciaenidae. The effects of shape description methods (shape indices, Procrustes analysis and elliptical Fourier analysis) on classification performance were evaluated. Procrustes analysis and elliptical Fourier analysis perform better than shape indices when single view is considered, but all perform equally well with combined views. A generic content-based image retrieval (CBIR) system that ranks dissimilarity (Procrustes distance) of otolith images was built to search query images without the need for detailed information of side (left or right), aspect (proximal or distal) and direction (positive or negative) of the otolith. Methods for the development of this automated classification system are discussed.
authors.affiliation: Institute of Biological Sciences, University of Malaya, 50603, Kuala Lumpur, Malaysia.
authors.forename: J Y
authors.initials: JY
authors.lastname: Wong
authors.affiliation: Institute of Biological Sciences, University of Malaya, 50603, Kuala Lumpur, Malaysia.
authors.forename: C
authors.initials: C
authors.lastname: Chu
authors.affiliation: Institute of Biological Sciences, University of Malaya, 50603, Kuala Lumpur, Malaysia.|Institute of Ocean and Earth Sciences, University of Malaya, 50603, Kuala Lumpur, Malaysia.
authors.forename: V C
authors.initials: VC
authors.lastname: Chong
authors.affiliation: Institute of Biological Sciences, University of Malaya, 50603, Kuala Lumpur, Malaysia.
authors.forename: S K
authors.initials: SK
authors.lastname: Dhillon
authors.affiliation: Institute of Ocean and Earth Sciences, University of Malaya, 50603, Kuala Lumpur, Malaysia.
authors.forename: K H
authors.initials: KH
authors.lastname: Loh
mesh_terms: D000818:Animals; D001699:Biometry / Q000379:methods*; D005399:Fishes; D005583:Fourier Analysis; D008853:Microscopy; D010037:Otolithic Membrane / Q000000981:diagnostic imaging*; D010473:Perciformes / Q000145:classification*
keywords: Malaysia; automated classification; geometric morphometrics; otoliths; shape analysis