動画像処理による抄紙機上のパルプスラリーの挙動の解析

抄録

Dynamic image processing was applied to analyze pulp slurry behavior on wire of a papermachine. This technique is based on processing a series of images captured with a high speed video camera system. When incident illumination was projected on the surface of slurry at grazing angle, the reflected light intensity shows a hill-valley contour. The surface of slurry can be, therfore, quantitized by this technique.
The following two contour parameters, profile size (hill-hill or valley-valley distance) and direction angle (angle of the slurry flow), are proposed to analyze the pulp slurry behavior.
By continously taking high speed video images and comparing gray levels of each frame, the cross directional profile size and the direction angle of the pulp slurry were evaluated. The cross directional profile size was calculated by two dimensional Fourier transform, and the direction angle was calculated by co-occurrence matrices.
The experimental results indicate that there exists specific cross directional profile size and frequency of direction angle for the papermaking condition applied.