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ROXAS - an efficient and accurate tool to detect vessels in diffuse-porous species

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Chapter Summary

To increase measurement efficiency of wood-anatomical parameters, novel tools like the automated image-analysis system ROXAS were developed. This chapter tests if ROXAS is able to measure vessel parameters in diffuse-porous European beech (Fagus sylvatica L.) with sufficient accuracy and efficiency. It measures vessel size and vessel density in nine consecutive tree rings with three different methods: (i) using ROXAS without and (ii) with manual refinement of the automatic measurement output, and (iii) using Image-Pro Plus (IPP) with manual refinement after automatic measurement. The output of these methods was compared in terms of measurement accuracy and time efficiency. Using species-specific settings, ROXAS even provided a more realistic output than IPP with its default settings. In addition, ROXASauto was much more efficient than the manual analysis methods. In summary, ROXAS can be used for the development of long and robust chronologies of wood-anatomical parameters.

Keywords: diffuse-porous species; European beech; ROXAS; wood-anatomical parameters



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