Apparatus and method for determining the center of annual...

Details Apparatus and method for determining the center of annual... Apparatus and method for determining the center of annual...

G - Physics

01

N

G01N 21/956 (2006.01) G01N 33/46 (2006.01) B27L 5/02 (2006.01)

Patent

CA 2716281

An apparatus and a method for determining the annual ring center of a wood block are disclosed. A plurality of lines of path is figured out and generated. Each line of path is composed of a plurality of lines each extending normal to a line that is tangential to an annual ring in an image of the wood block end. The normal line may be figured out, for example, by calculating the variance of values of pixels lying on each of a plurality of straight lines of a filter and the sum of the variances for the plurality of straight lines at a plurality of different angular positions of the filter. The annual ring center in the image of the wood block end is determined through calculation based on the points of intersection of the generated lines of path.

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