G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/84 (2006.01) G01N 21/898 (2006.01) G01N 33/46 (2006.01)
Patent
CA 2215642
The object of the invention is an on-line method for determining the wood-bark ratio in a flow of material containing both wood and bark. In the method, the flow of material (1) is illuminated and scanned using a CCD camera (2), by means of which 30 - 300 image pixels/cm are obtained in the transverse direction of the flow of material. Narrow transverse groups of 1 - 20 adjacent pixels, in which the brightness of the pixels deviates from a preset criterium are filtered out of the transverse group of pixels and the calculation of the wood-bark ratio of the photographs takes place without these narrow groups.
Aho Veli Juhani
Ahonen Mikko
Pietikainen Kalevi
Silvennoinen Pekka
Suuronen Jari
Gowling Lafleur Henderson Llp
Valtion Teknillinen Tutkimuskeskus
LandOfFree
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