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• W1514700352 abstract "The concept of automated species identification is relatively recent and advances are being driven by technological advances and the taxonomic impediment. This thesis describes investigations into the automated identification of ladybird species from colour images provided by the public, with an eventual aim of implementing an online identification system. Such images pose particularly difficult problems with regards to image processing as the insects have a highly domed shape and not all relevant features (e.g. spots) are visible or are fore-shortened. A total of 7 species of ladybird have been selected for this work; 6 native species to the UK and 3 colour forms of the Harlequin ladybird (Harmonia axyridis), the latter because of its pest status. Work on image processing utilised 6 geometrical features obtained using greyscale operations, and 6 colour features which were obtained using CIELAB colour space representation. Overall classifier results show that inter-species identification is a success; the system is able to, among all, correctly identify Calvia 14-guttata from Halyzia 16-guttata to 100% accuracy and Exochomus 4-pustulatus from H. axyridis f. spectabilis to 96.3% accuracy using Multilayer Perceptron and J48 decision trees. Intra-species identification of H. axyridis shows that H. axyridis f. spectabilis can be identified correctly up to 72.5% against H. axyridis f. conspicua, and 98.8% correct against H. axyridis f. succinea. System integration tests show that through the addition of user interaction, the identification between Harlequins and non-Harlequins can be improved from 18.8% to 75% accuracy." @default.
• W1514700352 created "2016-06-24" @default.
• W1514700352 creator A5003357606 @default.
• W1514700352 date "2012-08-01" @default.
• W1514700352 modified "2023-09-27" @default.
• W1514700352 title "Automated Ladybird Identification using Neural and Expert Systems" @default.
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