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Spatio-temporal differentiation method is one of the most effective methods of measuring the velocity of target. However, this method has a problem that large false velocity along the edge is often observed in the region near edge and across the boundary between objects of different velocity. This may be because the luminance in such regions changes steeply in a particular direction. To solve this...
Optical flow is referred to as velocity distribution of object image, and we have used spatio-temporal differentiation method to obtain optical flow. It is possible to obtain optical flow fast by the method, but the high velocity may induce large systematic errors. So, we introduced the compensation method for reducing the magnitude of velocity which is applied to spatio-temporal differentiation....
Spatio-temporal differentiation method is one of the most effective methods of determining the velocity of moving objects. However, the optical flow estimate takes long time so that real-time object tracking is difficult to realize. In this study, we evaluated consuming time of the optical flow estimation when calculating in parallel. The method of parallelization includes dividing input image into...
Spatio-temporal derivative method is one of the most effective methods of determining the velocity of moving objects. This method shows excellent response, but it has a problem that estimated velocity is not accurate where Hessian of the target pattern is small or there is noise on the image. It has been reported that one can obtain more stable velocity vectors by synthesizing the velocity vectors...
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