gabor⼩波变换matlab,Gabor wavelets transform 【Gab。。
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There is considerable evidence (reviewed in
MacLennan 1991) that images in primary visual cortex (V1) are
reprented in terms of Gabor wavelets, that is, hierarchically
arranged, Gaussian-modulated sinusoids (equivalent to the pure
states of quantum mechanics). The Gabor-wavelet transform of a
two-dimensional visual field generates a four-dimensional field:
two of the dimensions are spatial, the other two reprent spatial
frequency and orientation. To reprent this four-dimensional field微信群管理办法
in two-dimensional cortex, it is necessary to ``slice'' the field,
which gives ri to the columns and stripes of striate cortex. The
reprentation is nearly optimal, as defined by the Gabor
Uncertainty Principle (a generalization of the Heinberg漳浦县
Uncertainty Principle to information reprentation and
transmission). Time-varying two-dimensional visual images may be
viewed as three-dimensional functions of space-time, and it is
网名可爱possible that time-varying images are reprented in vision areas
葡萄酒的好处by a three-dimensional Gabor-wavelet transform, which generates a
言开头的成语
time-varying five-dimensional field (reprenting two spatial
dimensions, spatial frequency, spatial orientation and temporal
frequency). The effect is to reprent the ``optic flow'' of images
in terms spatially fixed, oriented grating patches with moving《七律长征》
gratings. (See MacLennan 1991 for more details.) Finally, Pribram
provides evidence that Gabor reprentations are also ud for猪皮冻>西西家园
controlling the generation of motor fields (e citations in
Gabor
滤波器定义为：其脉冲响应为⼀个谐波函数(即下式中的余弦函数)和⼀个⾼斯函数的乘积。根据信号与系统理论，时频域的卷积和乘积互为傅⾥叶变换。Gabor滤波器的傅⾥叶变换为谐波和⾼斯函数各⾃傅⾥叶变换的卷积。
