tailieunhanh - Báo cáo lâm nghiệp: "Assessment of the assortment potential of the growing stock – a photogrammetry based approach for an automatized grading of sample trees"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Assessment of the assortment potential of the growing stock – a photogrammetry based approach for an automatized grading of sample trees. | Ann. For. Sci. 63 2006 951-960 INRA EDP Sciences 2006 DOI forest 2006078 951 Original article Assessment of the assortment potential of the growing stock -a photogrammetry based approach for an automatized grading of sample trees Christine FURSTa Gérard NEPVEUb a Dresden University of Technology Institute for Soil Science and Site Ecology Pienner Road 19 01737 Tharandt Germany b LERFOB Laboratoire d Etude des Ressources Forêt-Bois UMR INRA-ENGREF Centre INRA de Nancy 54280 Champenoux France Received 15 August 2005 accepted 3 April 2006 Abstract - The presented paper introduces a photogrammetry based value inventory method including an electronic grading routine. The grading is realized by an automatic identification of stem surface features in eCognition. ECognition is an image analysis system using a polygon-oriented segmentation and a fuzzy logic based classification. The feature-related parameterisation within eCognition is oriented on key assortment criteria originating from timber selling contracts in two test regions in Saxony Germany . A total of eight Norway spruces Picea abies Karst. and eight Scots pines Pinus sylvestris L. was selected as sample material for the development of the classification process in eCognition. For two further sample trees -one Norway spruce and one Scots pine - the differences between a normal . visual sorting and a picture-interpretation supported and consequently more detailed sorting are presented. In the context of forest inventory the presented approach can support the acquirement of detailed sample-tree-based information on the assortment distribution at the level of management planning units in forest enterprises. stocking tree quality forest inventory photogrammetry automatized grading image analysis grading criteria timber selling contract Picea abies Pinus sylvestris Résumé - Estimation des assortiments potentiels dans une ressource en bois sur pied une méthode basée sur la photogrammétrie et la .

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