Fig. 1. Flow chart of speed measurement algorithm

Fig. 2. Schematic diagram of speed measurement image acquisition at Zhujiajiao Station

Fig. 3. Perspective transformation

Fig. 4. Perspective transformation original image

Fig. 5. Perspective transform result image

Fig. 6. Conventional feature point matching algorithm matching results

Fig. 7. Matching results of proposed feature point matching algorithm

Fig. 8. Video playback speed test effect

Fig. 9. Interval speed curve passing through the speed detection point

Fig. 10. The image effect of the line scan camera when the speed measurement system is not used

Fig. 11. The effect of line scan camera when using the speed measurement system