circular level vial

After the displacement between the center of the bubble and the scale circle is detected through a revised randomized Hough transform, the scale unit and the sensibility of circular bubble can be obtained.

提出了一种基于CCD图像测量的检测方法,该方法将被检圆水准器置于可微倾的工作台上,通过CCD图像系统获取圆水准器的数字图像,并采用随机Hough变换分别提取圆水准器的指标圆和水泡的圆心位置变化量,从而实时检测圆水准器的格值和灵敏度信息。