1993 Volume 42 Issue 473 Pages 126-131
For the quantitative evaluation of two-dimensional cell arrangement on the transverse section of wood, the angle and frequency distribution functions were extracted by some mathematical treatments of the power spectral pattern (PSP) which were obtained by the two dimensional FFT of simplified images of transverse sections. The transverse sections of seven softwoods and ten hardwoods were used for the analysis, and the arrangement of about one thousand tracheids and fibers within the sections was converted to the arrangement of small uniform-sized dots, where each dot corresponded to the center of cells. PSPs of these dot maps were normalized, transformed on the polar coordinate and then deconvoluted for the purification of the information of only cell arrangement and for the comparison among the specimens. From the angle distribution function, it was possiblee to estimate the array regularity of cells on the radial files, as well as to clarify the oblique-arrangement of cells in all softwoods and in some hardwoods. Furthermore, the two-dimensional cell size and its variation was able to be evaluated based on the frequency distribution function.
