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Proceedings Paper

Measuring Timber Truck Loads With Image Processing In Paper Mills
Author(s): M. Santos Silva; Fernando D. Carvalho; F. Carvalho Rodrigues; Ana Nobre R. Goncalves
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Paper Abstract

The raw material for the paper industry is wood. To have an exact account of the stock of piled sawn tree trunks every truck load entering the plant's stockyard must be measured as to the amount of wood being brought in. Weighting down the trucks has its own problems, mainly, due to the high capacity of the tree trunks to absorb water. This problem is further enhanced when calculations must be made to arrive at the mass of sawn tree trunks which must go into the process of producing a certain quantity of paper pulp. The method presented here is based on two fixed cameras which take the image of the truck load. One takes a view of the trunks in order to get information on the average length of the tree trunks. The other obtains a side view which is digitised and by just discriminating against a grey level the area covered by the tree trunk cross section is measured. A simple arithmetic operation gives the volume of wood in the trunk. The same computer, a PC, will register the trucks particulars is almost independent of weather the wood is wet or dry and it serves trucks of any size.

Paper Details

Date Published: 5 April 1989
PDF: 6 pages
Proc. SPIE 1075, Digital Image Processing Applications, (5 April 1989); doi: 10.1117/12.952668
Show Author Affiliations
M. Santos Silva, Universidade Da Beira Interior (Portugal)
Fernando D. Carvalho, Lneti - Optica - Est. Paco Do Lumiar (Portugal)
F. Carvalho Rodrigues, Lneti - Optica - Est. Paco Do Lumiar (Portugal)
Ana Nobre R. Goncalves, Lneti - Optica - Est. Paco Do Lumiar (Portugal)


Published in SPIE Proceedings Vol. 1075:
Digital Image Processing Applications
Ying-Wei Lin; Ram Srinivasan, Editor(s)

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