Extracting the center of the light stripe of the line structure is a key step in the three-dimensional meas- urement system. In view of the complex lighting environment and the time-consuming problem of the Steger algorithm, a fast and accurate method for extracting the center of the light stripe is proposed. Filtering algorithm is used to de- noise, top hat operation and edge detection to eliminate complex lighting in the background; then the improved Rosen- feld skeletal is used to obtain the initial center, and the initial center point and the upper and lower contour points of the stripes are fitted to calculate the normal direction of the initial center and the line width of the light stripes; finally, the sub-pixel center point is obtained based on the improved Hessian matrix. Experiments show that the algorithm is suitable for complex and changeable environments; the running time of the algorithm is 0. 151 s, which is nearly 8 times higher than that of the Steger algorithm; the extraction accuracy is 0. 23 pixel, which retains the high precision of the Steger algorithm and can achieve fast and accurate extraction of the center of the light stripe.