Intra-patient Prone to Supine Colon Registration for Synchronized Virtual Colonoscopy
MICCAI '02 Proceedings of the 5th International Conference on Medical Image Computing and Computer-Assisted Intervention-Part II
Image Processing, Analysis, and Machine Vision
Image Processing, Analysis, and Machine Vision
Grey Weighted Polar Distance Transform for Outlining Circular and Approximately Circular Objects
ICIAP '07 Proceedings of the 14th International Conference on Image Analysis and Processing
Estimation of pith position in untreated log ends in sawmill environments
Computers and Electronics in Agriculture
PSIVT'07 Proceedings of the 2nd Pacific Rim conference on Advances in image and video technology
Original paper: Automatic counting of annual rings on Pinus sylvestris end faces in sawmill industry
Computers and Electronics in Agriculture
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The annual ring pattern of a log end face is related to the quality of the wood. We propose a method for computing the number of annual rings on a log end face depicted in sawmill production. The method is based on the grey-weighted polar distance transform and registration of detected rings from two different directions. The method is developed and evaluated on noisy images captured in on-line sawmill production at a Swedish sawmill during 2008, using an industrial colour camera. We have also evaluated the method using synthetic data with different ring widths, ring eccentricity, and noise levels.