DETECTION OF DISEASE SYMPTOMS ON HYPERSPECTRAL 3D PLANT MODELS
We analyze the benefit of combining hyperspectral images information with 3D geometry information for the detection of <i>Cercospora</i> leaf spot disease symptoms on sugar beet plants. Besides commonly used one-class Support Vector Machines, we utilize an unsupervised sparse representat...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2016-06-01
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| Series: | ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | http://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/III-7/89/2016/isprs-annals-III-7-89-2016.pdf |
| Summary: | We analyze the benefit of combining hyperspectral images information with 3D geometry information for the detection of <i>Cercospora</i>
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. |
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| ISSN: | 2194-9042 2194-9050 |