High speed photometric stereo pavement scanner

摘要

#$%^&*AU2009245853B220131219.pdf#####ABSTRACT The invention relates to a pavement scanning system comprising a movable platform, multiple light sources mounted on the platform for 5 illuminating a pavement surface from multiple different angles, at least one image capture device mounted on the platform that captures sequential images of the illuminated pavement surface and a movement sensor that encodes movement of the platform and provides a synchronisation signal for synchronising the multiple light sources and the 10 at least one image capture device for multiple image capture. The pavement scanning system also comprises at least one processing means that resamples the multiple captured sequential images to compensate for difference in collection time and calculates surface 15 gradient and albedo for each point on the pavement surface or directly uses the multiple images to detect surface features.-0 C 0 c C Lr)U- ) U CEa U ) 4.-_ C) I CU m c) CU) C ) C. C) UE ~ 0 a a) c fl U). U.) CCU .4L ' a) U a) c- U)C c _9 CC ___0 U) IL Dd)0CU) oUa) o ) C- 0 ~CL *~U .~-~~UC C.F~L I 'O Mc 0* a) cn E