| 摘要 |
<P>PROBLEM TO BE SOLVED: To detect the level of a liquid in a container while constituting an imaging system at a low cost in a space saving manner by using only an image taken by transmitted illumination, and discriminating a bubble with further high accuracy. <P>SOLUTION: An edge corresponding to a liquid level is detected by obtaining a gray image from the taken image and differentiating the density value of each pixel of the gray image. Whether or not a change part of continuity is present in the edge is determined, and when no change part of continuity is present, this edge is detected as the liquid level. When the change part of continuity is present, presence/absence of bubble is discriminated, based on a density average value of pixels contained in this part. When no bubble is present, the edge is detected as the liquid level, and when a bubble is present, the edge on the vertically lower side of the bubble is detected as the liquid level. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
