A novel method for tracking underwater objects in three-dimensional space is proposed. Specifically, by a single camera this method has the ability to estimate the three-dimensional trajectory of the interest objects. Mathematically the general framework of this method is formulated as a probabilistic problem. In addition to the twodimensional location in the image plane, the parameter respect ...

Humans demonstrate preferences to use egocentric or allocentric reference frames in navigation tasks that lack embodied (vestibular and/or proprioceptive) cues. Here, we investigated how reference frame proclivities affect spatial navigation in horizontal versus vertical planes. Point-to-origin performance after visually displayed vertical trajectories was surprisingly accurate and almost match...

We assess whether salient auditory events contained in soundtracks modify eye movements when exploring videos. In a previous study, we found that on average, non-spatial sound contained in video soundtracks impacts on eye movements. This result indicates that sound could play a leading part in visual attention models to predict eye movements. In this research, we go further and test whether the...

An important aspect of qualitative spatial reasoning is understanding mechanisms . This paper presents a qualitative analysis of motion for mechanical linkages . In particular, we describe how to analyze the behavior of a mechanism which has a movable axis . The basic idea of our approach is to represent relative motions of the link in terms of quadrants (qualitatively representing the directio...

We propose a method for automatic target detection and tracking in forward-looking infrared (FLIR) image sequences. We use morphological connected operators to extract and track targets of interest and remove undesirable clutter. The design of these operators is based on general size, connectivity and motion criteria, using spatial intraframe and temporal interframe information. In a first step...

This paper examines possible influences of language on thought in the domain of spatial reasoning. Language communities differ in their stock of reference frames (coordinate systems to reference locations and directions). English typically uses egocentrically-defined axes (“leftright”). Other languages like Tseltal lack such a system but use geocentrically-defined axes ("north-south"). We ask w...

We demonstrate the role of commonsense inference toward the modeling of qualitative notions of space and spatial change within a dynamic setup. The inference patterns are connected to those that are required to handle the frame problem whilst modeling inertia, and the causal minimisation of Lin [1995] that is required to account for the ramifications of occurrences. Such patterns are both usefu...

Qualitative spatial reasoning (QSR) abstracts metrical details of the physical world. The two main directions in QSR are topological reasoning about regions and reasoning about orientations of point configurations. Orientations can refer to a global reference system, e.g. cardinal directions or instead only to relative orientation, e.g. egocentric views. Reasoning about relative orientations po...

in this paper we proved that every g-riesz basis for hilbert space $h$ with respect to $k$ by adding a condition is a riesz basis for hilbert $b(k)$-module $b(h,k)$. this is an extension of [a. askarizadeh,m. a. dehghan, {em g-frames as special frames}, turk. j. math., 35, (2011) 1-11]. also, we derived similar results for g-orthonormal and orthogonal bases. some relationships between dual fram...

This paper presents an approach for human action recognition by finding the discriminative key frames from a video sequence and representing them with the distribution of local motion features and their spatiotemporal arrangements. In this approach, the key frames of the video sequence are selected by their discriminative power and represented by the local motion features detected in them and i...