A Method of Error Compensation in Image Based Visual Servo

This paper introduces a practical method which based on edge detecting by Canny operator and line detecting by Hough transform to compensate the error between the center of the special label and the typical target object when use the technology of special label to identify the object in the process of visual servo. The coordinates of the label center can be accurately measured by the program that can find and identify the special label. Two lines which reflect the edge of the object can be obtained by dealing with the edge points obtained using Hough transform by Canny operator. The actual coordinates of the object can be estimated according to the two lines and the coordinates of the special label. The algorithm is described in details and experimented with experiments.