RESEARCHES

Smart Vision & and Sensing

Professor, Robotics Laboratory
Department of System Cybernetics, Graduate School of Advanced Science and Engineering
Hiroshima University
Idaku ISHII
>> Research Contents
In order to establish high-speed robot senses that are much faster than human senses, we are conducting research and development of information systems and devices that can achieve real-time image processing at 1000 frames/s or greater. As well as integrated algorithms to accelerate sensor information processing, we are also studying new sensing methodologies based on vibration and flow dynamics; they are too fast for humans to sense.

HFR-video-based Dynamic ImagePattern Recognition

In this study, we propose a novel method for dynamics-based image-pattern recognition that can be used to inspect a specified vibrating pattern by computing temporal frequency responses in time-varying brightness signals at all the pixels of a high-frame-rate video sequence. The temporal frequency responses, which are the histograms of temporal frequency components in time-varying brightness signals, can be calculated using the short-term Fourier transform, and they are matched pixelwise with those of a reference vibrating pattern to determine whether a specific vibrating pattern is recognized. The effectiveness of our dynamics-based image pattern-recognition method is demonstrated using several vibration-source localization results for flying multicopters and insects, the rotating or flapping frequencies of which were in the range of hundreds of Hertz.



Environment

 



mp4 movie(9.5 MB)
input video (1000fps)
mp4 movie(0.5 MB)
extracted vibration region