ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., III-7, 89-96, 2016
07 Jun 2016
Ribana Roscher1,*, Jan Behmann1,*, Anne-Katrin Mahlein2, Jan Dupuis1, Heiner Kuhlmann1, and Lutz Plümer1 1University of Bonn, Institute of Geodesy and Geoinformation, Bonn, Germany
2University of Bonn, Institute of Crop Science and Resource Conservation - Phytomedicine, Bonn, Germany
*These authors contributed equally to this work.
Keywords: Hyperspectral 3D plant models, close range, anomaly detection, sparse representation, topographic dictionaries Abstract. We analyze the benefit of combining hyperspectral images information with 3D geometry information for the detection of Cercospora leaf spot disease symptoms on sugar beet plants. Besides commonly used one-class Support Vector Machines, we utilize an unsupervised sparse representation-based approach with group sparsity prior. Geometry information is incorporated by representing each sample of interest with an inclination-sorted dictionary, which can be seen as an 1D topographic dictionary. We compare this approach with a sparse representation based approach without geometry information and One-Class Support Vector Machines. One-Class Support Vector Machines are applied to hyperspectral data without geometry information as well as to hyperspectral images with additional pixelwise inclination information. Our results show a gain in accuracy when using geometry information beside spectral information regardless of the used approach. However, both methods have different demands on the data when applied to new test data sets. One-Class Support Vector Machines require full inclination information on test and training data whereas the topographic dictionary approach only need spectral information for reconstruction of test data once the dictionary is build by spectra with inclination.
Conference paper (PDF, 5379 KB)

Citation: Roscher, R., Behmann, J., Mahlein, A.-K., Dupuis, J., Kuhlmann, H., and Plümer, L.: DETECTION OF DISEASE SYMPTOMS ON HYPERSPECTRAL 3D PLANT MODELS, ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., III-7, 89-96, doi:10.5194/isprs-annals-III-7-89-2016, 2016.

BibTeX EndNote Reference Manager XML