Abstract
Wavelet Analysis of X-ray Density Function of Tree Ring Structure
Highlights
It can be assumed that the process of formation of woody tissue is a periodic one and that the characteristic periods include several annual rings
Our work focuses on the development of different mathematical procedures for the analysis of X-ray density function (XDF) that may enable better understanding of the growth of individual trees along the radius of their bole
Wavelet analysis can significantly increase the body of information that can be obtained from the investigated signal
Summary
Juvenile wood formation is an important natural process in stem growth and it has been widely studied in the last 50 years (Gartner, 1996; Larson, 1968; Yang et al, 1994). Juvenile and mature wood refers to two main zones of the xylem. Juvenile wood becomes especially interesting for forestry because of the short rotation cycle that is typical in plantation forestry. As a result of change in forestry management, the proportion of juvenile wood in tree stems has increased. This may have a major effect on wood properties and product quality, especially in conifers (Maeglin, 1987). The juvenile wood boundary can be determined by examining a number of different physical or chemical properties (Wang and Stewart, 2013)
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