ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-5/W2, 133-138, 2013
http://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/II-5-W2/133/2013/
doi:10.5194/isprsannals-II-5-W2-133-2013
© Author(s) 2013. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
16 Oct 2013
Radiometric Correction of Terrestrial LiDAR Data for Mapping of Harvest Residues Density
K. Koenig1, B. Höfle1, L. Müller1, M. Hämmerle1, T. Jarmer2, B. Siegmann2, and H. Lilienthal3 1Institute of Geography, University of Heidelberg, Germany
2Institute for Geoinformatics and Remote Sensing, University of Osnabrueck, Germany
3Julius Kühn-Institut, Institute for Crop and Soil Science, Germany
Keywords: Terrestrial Laser Scanning, Radiometric Correction, Signal Amplitude, Classification, Harvest residues Abstract. In precision agriculture detailed geoinformation on plant and soil properties plays an important role. Laser scanning already has been used to describe in-field variations of plant growth in 3D and over time and can serve as valuable complementary topographic data set for remote sensing, such as deriving soil properties from hyperspectral sensors. In this study full-waveform laser scanning data acquired with a Riegl VZ-400 instrument is used to classify 3D point clouds into post-harvest straw residues and bare soil. A workflow for point cloud based classification is presented using radiometric and geometric point features. A radiometric correction is performed by using a range-correction function f(r), which is derived from lab experiments with a reference target of known reflectance. Thereafter, the corrected signal amplitude and local height features are explored with respect to the target classes. The following procedure includes feature calculation, decision tree analysis, point cloud classification and finally result validation using detailed classified reference RGB images. The classification tree separates the classes of harvest residues and bare soil with an accuracy of 96% by using geometric and radiometric features. The LiDAR-derived harvest residue coverage value of 75% lies in accordance with the image-based reference (coverage of 68%). The results indicate the high potential of radiometric features for natural surface classification, particularly in combination with geometric features.
Conference paper (PDF, 620 KB)


Citation: Koenig, K., Höfle, B., Müller, L., Hämmerle, M., Jarmer, T., Siegmann, B., and Lilienthal, H.: Radiometric Correction of Terrestrial LiDAR Data for Mapping of Harvest Residues Density, ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-5/W2, 133-138, doi:10.5194/isprsannals-II-5-W2-133-2013, 2013.

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