Automated identification of animal species in camera trap images

作者：Yu Xiaoyuan; Wang Jiangping^*; Kays Roland; Jansen Patrick A; Wang Tianjiang; Huang Thomas

来源：EURASIP Journal on Image and Video Processing, 2013, 2013(1): 52.

DOI：10.1186/1687-5281-2013-52

• Species identification
• SIFT
• cLBP
• Feature learning
• Max pooling
• Weighted sparse coding

Image sensors are increasingly being used in biodiversity monitoring, with each study generating many thousands or millions of pictures. Efficiently identifying the species captured by each image is a critical challenge for the advancement of this field. Here, we present an automated species identification method for wildlife pictures captured by remote camera traps. Our process starts with images that are cropped out of the background. We then use improved sparse coding spatial pyramid matching (ScSPM), which extracts dense SIFT descriptor and cell-structured LBP (cLBP) as the local features, that generates global feature via weighted sparse coding and max pooling using multi-scale pyramid kernel, and classifies the images by a linear support vector machine algorithm. Weighted sparse coding is used to enforce both sparsity and locality of encoding in feature space. We tested the method on a dataset with over 7,000 camera trap images of 18 species from two different field cites, and achieved an average classification accuracy of 82%. Our analysis demonstrates that the combination of SIFT and cLBP can serve as a useful technique for animal species recognition in real, complex scenarios.

• 出版日期2013
• 单位华中科技大学