speckle pattern Calibration 1 Calibration method 1 Camera Distortion 1 Camera calibration 1 Cameras 1 Digital image correlations 1 Distortion calibration 1 Human activity recognition 1 Image analysis 1 Image enhancement 1 Pattern recognition 1 Point-to-point camera distortion calibration 1 Speckle 1 Speckle patterns 1 Strain measurement 1 Vision based 1 Vision-based human activity recognition 1 camera calibration 1 digital image correlation 1 digital image correlation (DIC) 1 point-to-point camera distortion calibration 1 structural health monitoring (SHM) 1 unmanned aerial vehicle image correlation (UAVIC) 1 vision-based human activity recognition 1