BAF: Before and after stem imaging as a tool for assessing the cork growth
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[1] Universidade de Évora
Universidade de Évora
Senhora da Saúde, Portugal
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[2] Instituto Superior de Agronomia (Lisboa)
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- Localización: Suberwood: new challenges for the integration of cork oak forests and products / Javier Vázquez Piqué (ed. lit.), Helena Pereira (ed. lit.), María Arantzazu González Pérez (ed. lit.), 2008, ISBN 978-84-96826-47-2, págs. 147-155
- Idioma: español
- Texto completo no disponible (Saber más ...)
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Resumen
Study of the cork growth over stem is a complicated task, concerning the amount of measurements which have to be taken to representatively evaluate the differences in growth in different height parts of stem. It is possible to compare the photos taken before debark and after debark to evaluate the changes and like this assess the growth of cork. In the photos there are two objects (stems) to compare: one larger and darker in the photo before debark and second finer and orange in the photo after debark. The difference between these two objects is the cork width. In the field conditions, the principal problem is to take picture twice from the same position, the same angle and same inclination of camera. Various approaches of fixing the camera on the same position evaluated during the work are presented and discussed. The algorithm for automatic evaluation of images is presented.
