Optical flows optical flow 3 Feature extraction 2 Features extraction 2 Object detection 2 Object recognition 2 article 2 motion 2 optic flow 2 Action detection 1 Action localization 1 Adaptive thresholds 1 Algorithms 1 Beating heart 1 Cardiac imaging 1 Continuum mechanics 1 Contrast imaging 1 Convolution 1 Convolutional neural network 1 Convolutional neural networks 1 Corner feature 1 Deep learning 1 Deep neural networks 1 Deformation analysis 1 Detectors 1 Diagnostic Imaging 1 Dynamic scenes 1 Dynamic speckle 1 Edge detection 1 Experimental mechanics 1