منابع مشابه
Pooling and segmenting motion signals
Humans are extremely sensitive to visual motion, largely because local motion signals can be integrated over a large spatial region. On the other hand, summation is often not advantageous, for example when segmenting a moving stimulus against a stationary or oppositely moving background. In this study we show that the spatial extent of motion integration is not compulsory, but is subject to vol...
متن کاملPooling elementary motion signals into perception of global motion direction
Six observers were asked to indicate in which of two opposite directions, to the right or to the left, an entire display appeared to move, based on the proportion of right vs leftward motion elements, each of which was distinctly visible. The performance of each observer was described by Thurstone's discriminative processes and Bernoulli trial models which described empirical psychometric funct...
متن کاملSpatial pooling of one-dimensional second-order motion signals.
We can detect visual movements not only from luminance motion signals (first-order motion) but also from non-luminance motion signals (second-order motion). It has been established for first-order motions that the visual system pools local one-dimensional motion signals across space and orientation to solve the aperture problem and to estimate two-dimensional object motion. In this study, we in...
متن کاملDetecting and Segmenting Periodic Motion
A new algorithm is presented for the detection and segmentation of multiple periodic motions in image sequences A periodicity measure which provides an accurate quantitative measure of sig nal periodicity in the form of temporal harmonic energy ratio is proposed The periodicity tem plates which incorporate the segmented region with the associated periodicity energy distribu tion and motion fund...
متن کاملConditional spatial-frequency selective pooling of one-dimensional motion signals into global two-dimensional motion
This study examined spatial-frequency effects on a motion-pooling process in which spatially distributed local one-dimensional motion signals are integrated into the perception of global two-dimensional motion. Motion pooling over two- to three-octave frequency differences was found to be nearly impossible when all Gabor elements had circular envelopes, but possible when the width of high-frequ...
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ژورنال
عنوان ژورنال: Vision Research
سال: 2009
ISSN: 0042-6989
DOI: 10.1016/j.visres.2008.10.024