Patents by Inventor Pekka Silvennoinen

Pekka Silvennoinen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • On-line method for determining the wood-bark ratio from a flow of material
    Patent number: 6137894
    Abstract: An on-line method for determining the wood-bark ratio in a flow of material containing both wood and bark includes illuminating the flow of material and scanning using a CCD camera, 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.
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: October 24, 2000
    Assignee: Valtion teknillinen tutkimuskeskus
    Inventors: Mikko Ahonen, Kalevi Pietikainen, Jari Suuronen, Pekka Silvennoinen, Veli Juhani Aho