In robot navigation a model of the environment needs to be reconstructed for various applications, including path planning, obstacle avoidance and determining where the robot is located. Traditionally, the model was acquired using two images (two{frame Structure from Motion) but the acquired models were unreliable and inaccurate. Recently, research has shifted to using several frames (multi{fra...

The work presented in this paper describes a novel algorithm for automatic video object tracking based on a process of subtraction of successive frames, where the prediction of the direction of movement of the object being tracked is carried out by analyzing the changing areas generated as result of the object’s motion, specifically in regions of interest defined inside the object being tracked...

We estimated the length of motion-detecting receptive fields in human vision by measuring direction discrimination for three novel stimuli. The motion sequences contained either (i) alternate frames of two differently oriented sinusoidal gratings; (ii) alternate frames of vertical grating and plaid stimuli or (iii) a vertical grating divided into horizontal strips of equal height, where alterna...

Whereas bacteria such as Escherichia coli have been known for some time to cleave carbon-phosphorus (C-P) bonds in unactivated alkylphosphonates, the enzymes responsible for C-P lyase activity have resisted detection or purification. Genes from E. coli B that support growth on alkylphosphonates as the sole phosphorus source have now been cloned (B. L. Wanner and J. A. Boline, unpublished data)....

For real-time 3D visualization of respiratory organ motion for MRI-guided therapy, a new adaptive 4D MR imaging method based on navigator echo and multiple gating windows was developed. This method was designed to acquire a time series of volumetric 3D images of a cyclically moving organ, enabling therapy to be guided by synchronizing the 4D image with the actual organ motion in real time. The ...

How does the brain determine the position of moving objects? It turns out to be rather complex to answer this question when we realize that the brain has to solve the motion correspondence problem in two kinds of reference frames: Retinotopic and non-retinotopic ones. We show that visual objects are mislocalized along a non-retinotopic motion direction. Observers viewed two successive movie fra...

The steel racks on the floor are seen as live loads in current design process, ignoring interaction with supporting frames. In this paper, multiple different masses and stiffnesses placed first of a two-story main structure to form real structures (RS). corresponding simplified (SS) frames mass concentrated structure. Modal analysis is performed analyze relationship between periods RS SS cross-...

Video object detection is an important research direction of computer vision. The task video to detect and classify moving objects in a sequence images. Based on the static image detector, most existing methods use unique temporal correlation solve problem missed false caused by occlusion blur. Another model guided optical flow network widely used. Feature aggregation adjacent frames performed ...

G-frames are natural generalizations of frames which provide more choices on analyzing functions from frame expansion coefficients. First, they were defined in Hilbert spaces and then generalized on C*-Hilbert modules. In this paper, we first generalize the concept of g-frames to Hilbert modules over pro-C*-algebras. Then, we introduce the g-frame operators in such spaces and show that they sha...