In this paper, we address the problem of estimating the optical flow in long-term video sequences. We devise a computational scheme that exploits the idea of receptive fields, in which the pixel flow does not only depends on the brightness level of the pixel itself, but also on neighborhood-related information. Our approach relies on the definition of receptive units that are invariant to affine transformations of the input data. This distinguishing characteristic allows us to build a video-receptive-inputs database with arbitrary detail level, that can be used to match local features and to determine their motion. We propose a parallel computational scheme, well suited for nowadays parallel architectures, to exploit motion information and invariant features from real-time video streams, for deep feature extraction, object detection, tracking, and other applications.

On-line video motion estimation by invariant receptive inputs / Gori, Marco; Lippi, Marco; Maggini, Marco; Melacci, Stefano. - (2014), pp. 726-731. ((Intervento presentato al convegno 2014 IEEE Conference on Computer Vision and Pattern Recognition Workshops, CVPRW 2014 tenutosi a usa nel 2014.

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