منابع مشابه
Estimating local multiple orientations
In the last decades, orientation estimation has often been investigated for instance in the domain of still image analysis for feature extraction [5] or in the context of video stream processing for motion analysis [10] [20] [27]. Applications of orientation estimation vary, for example, from the enhancement of ancient engravings to the analysis of fingerprint images or seismic data [8]. Orient...
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We consider a network represented by a simple connected undirected graph with N vertices. The nodes of the graph do not have any special unique identifiers, the only requirement is that each incident edge of a vertex v of degree dv has assigned a locally-unique label (portname) between 1 and dv, inclusive. This is called a local orientation. Our main goal is to have an agent visit all vertices ...
متن کاملSelectivity for multiple orientations in visual search
Observer strategies in visual search for targets containing multiple orientations were considered in the study. We used our efficient search framework (Tavassoli et al., 2007), a reverse-correlation based technique distinguishing between nonfoveal and foveal processes, to examine how observers search for low-contrast targets created from sums (Experiment 1) and mosaics (Experiment 2) of Gabors....
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Models containing recurrent connections amongst the cells within a population can account for a range of empirical data on orientation selectivity in striate cortex. However, existing recurrent models are unable to veridically encode more than one orientation at a time. Underlying this inability is an inherent limitation in the variety of activity pro"les that can be stably maintained. We propo...
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The mutation of Ala-i 17 to Val conferred dehydroepiandrosterone (DHEA) hydroxylase activity on cytochrome P-450 2a-4, with the production of both 2aand 7ahydroxyDHEA at similar rates. P-450 2a-5 which has Val at position 117, acquired high DHEA hydroxylase activity by mutation of Phe-209. Mutant F209L of P-450 2a-5 exhibited strong regiospecificity at the 2-position of the DHEA molecule with t...
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ژورنال
عنوان ژورنال: Signal Processing
سال: 2007
ISSN: 0165-1684
DOI: 10.1016/j.sigpro.2007.01.017