13,344 research outputs found
Live Demonstration: On the distance estimation of moving targets with a Stereo-Vision AER system
Distance calculation is always one of the most
important goals in a digital stereoscopic vision system. In an
AER system this goal is very important too, but it cannot be
calculated as accurately as we would like. This demonstration
shows a first approximation in this field, using a disparity
algorithm between both retinas. The system can make a distance
approach about a moving object, more specifically, a qualitative
estimation. Taking into account the stereo vision system
features, the previous retina positioning and the very important
Hold&Fire building block, we are able to make a correlation
between the spike rate of the disparity and the distance.Ministerio de Ciencia e Innovación TEC2009-10639-C04-0
An Approach to Distance Estimation with Stereo Vision Using Address-Event-Representation
Image processing in digital computer systems usually considers the
visual information as a sequence of frames. These frames are from cameras that
capture reality for a short period of time. They are renewed and transmitted at a
rate of 25-30 fps (typical real-time scenario). Digital video processing has to
process each frame in order to obtain a result or detect a feature. In stereo
vision, existing algorithms used for distance estimation use frames from two
digital cameras and process them pixel by pixel to obtain similarities and
differences from both frames; after that, depending on the scene and the
features extracted, an estimate of the distance of the different objects of the
scene is calculated. Spike-based processing is a relatively new approach that
implements the processing by manipulating spikes one by one at the time they
are transmitted, like a human brain. The mammal nervous system is able to
solve much more complex problems, such as visual recognition by
manipulating neuron spikes. The spike-based philosophy for visual information
processing based on the neuro-inspired Address-Event-Representation (AER) is
achieving nowadays very high performances. In this work we propose a two-
DVS-retina system, composed of other elements in a chain, which allow us to
obtain a distance estimation of the moving objects in a close environment. We
will analyze each element of this chain and propose a Multi Hold&Fire
algorithm that obtains the differences between both retinas.Ministerio de Ciencia e Innovación TEC2009-10639-C04-0
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