A kind of light stream speed measuring module and speed-measuring method

A kind of light stream speed measuring module includes: video camera array, arithmetic element and statistic unit.Video camera array includes N × M video camera, to shoot N × M images of environment surrounding；Arithmetic element calculates N × M video camera speed and N × M standard deviation according to N × M images of environment surrounding；Statistic unit calculates a statistics movement velocity according to N × M video camera speed and N × M standard deviation, and wherein N and M is all the natural number greater than 1.Compared to the prior art, the present invention shoots multiple images using video camera array composed by multiple video cameras, to reduce because the unfavorable factor that ground is reflective or environment light source causes image texture to be not easy to recognize, can promote the reliability using light stream speed measuring module measuring speed.