利用摄像头前后两次采集的图像，通过对图像进行霍夫变换、滑动平均、拟合等处理得到主尺和游标的刻度位置，再对游标和主尺的刻度位置进行比较找到对齐的游标刻度，并能在像素大小与游标卡尺精度相近的情况下．可以有效地减少误差。%The use of the two images collected before and after the camera image, the Hough transform, mov- ing average, fitting handle the main scale and scale position the cursor, scale position of the cursor and the main scale comparative find alignment vernier scale, and in the ease of close to a pixel size with a vernier caliper accura- cy, can reduce the error effectively.
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