Automatic operations play an important role in societies by saving time and improving efficiency. In this paper, we apply the digital image processing method to the field of lumbering to automatically calculate tree diameters in order to reduce culler work and enable a third party to verify tree diameters. To calculate the cross-sectional diameter of a tree, the image was first segmented by the marker-controlled watershed transform algorithm based on the hue saturation intensity (HSI) color model. Then, the tree diameter was obtained by measuring the area of every isolated region in the segmented image. Finally, the true diameter was calculated by multiplying the diameter computed in the image and the scale, which was derived from the baseline and disparity of correspondence points from stereoscopic image pairs captured by rectified configuration cameras.
© 2012 Optical Society of America
Original Manuscript: January 23, 2012
Revised Manuscript: April 16, 2012
Manuscript Accepted: May 7, 2012
Published: June 15, 2012
Faliu Yi and Inkyu Moon, "Automatic calculation of tree diameter from stereoscopic image pairs using digital image processing," Appl. Opt. 51, 4120-4128 (2012)