ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., IV-1/W1, 141-148, 2017
https://doi.org/10.5194/isprs-annals-IV-1-W1-141-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
30 May 2017
SEMANTIC SEGMENTATION OF FOREST STANDS OF PURE SPECIES AS A GLOBAL OPTIMIZATION PROBLEM
C. Dechesne, C. Mallet, A. Le Bris, and V. Gouet-Brunet Univ. Paris-Est, LASTIG MATIS, IGN, ENSG, F-94160 Saint-Mande, France
Keywords: Forest stands, classification, regularization, semantic segmentation, graph-cut, graphical models, MRF, CRF Abstract. Forest stand delineation is a fundamental task for forest management purposes, that is still mainly manually performed through visual inspection of geospatial (very) high spatial resolution images. Stand detection has been barely addressed in the literature which has mainly focused, in forested environments, on individual tree extraction and tree species classification. From a methodological point of view, stand detection can be considered as a semantic segmentation problem. It offers two advantages. First, one can retrieve the dominant tree species per segment. Secondly, one can benefit from existing low-level tree species label maps from the literature as a basis for high-level object extraction. Thus, the semantic segmentation issue becomes a regularization issue in a weakly structured environment and can be formulated in an energetical framework. This papers aims at investigating which regularization strategies of the literature are the most adapted to delineate and classify forest stands of pure species. Both airborne lidar point clouds and multispectral very high spatial resolution images are integrated for that purpose. The local methods (such as filtering and probabilistic relaxation) are not adapted for such problem since the increase of the classification accuracy is below 5%. The global methods, based on an energy model, tend to be more efficient with an accuracy gain up to 15%. The segmentation results using such models have an accuracy ranging from 96% to 99%.
Conference paper (PDF, 2153 KB)


Citation: Dechesne, C., Mallet, C., Le Bris, A., and Gouet-Brunet, V.: SEMANTIC SEGMENTATION OF FOREST STANDS OF PURE SPECIES AS A GLOBAL OPTIMIZATION PROBLEM, ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., IV-1/W1, 141-148, https://doi.org/10.5194/isprs-annals-IV-1-W1-141-2017, 2017.

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