19 December 1996 Real-time, miniaturized optical sensor for motion estimation and time-to-crash detection
Author Affiliations +
Proceedings Volume 2950, Advanced Focal Plane Arrays and Electronic Cameras; (1996) https://doi.org/10.1117/12.262544
Event: Advanced Imaging and Network Technologies, 1996, Berlin, Germany
The paper presents a low cost, miniature sensor that is able to compute in real time (up to 1000 frames/sec) motion parameters like the degree of translation, expansion or rotation that is present in the observed scene, as well as the so-called time-to-crash (TTC), that is the time required for a moving object to collide with the sensor. The sensing principle is that of computing and analyzing the optical flow projected by the scene on the sensor focal plane, through a novel algorithmic technique, based on sparse sampling of the image and one-dimensional correlation. The hardware implementation of the algorithm is based on two custom VLSI chips: one is a CMOS image sensor, having nonstandard pixel geometry, while the other one is a digital correlator that computes at high speed the optical flow vectors. The high-level control and communication tasks are managed by a microcontroller, thus guaranteeing a high level of flexibility and adaptability of the sensor properties towards different application requirements and/or variable external conditions.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nicola Ancona, Nicola Ancona, Giuseppe Creanza, Giuseppe Creanza, D. Fiore, D. Fiore, R. Tangorra, R. Tangorra, Bart Dierickx, Bart Dierickx, Guy Meynants, Guy Meynants, Danny Scheffer, Danny Scheffer, } "Real-time, miniaturized optical sensor for motion estimation and time-to-crash detection", Proc. SPIE 2950, Advanced Focal Plane Arrays and Electronic Cameras, (19 December 1996); doi: 10.1117/12.262544; https://doi.org/10.1117/12.262544

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