III. GABOR WAVELET
This paper presents the texture analysis using Gabor
filters, evaluating also the performance in identifying
models in a large database of images representing textures.
These images are compared with other representations of
existing textures. A simple algorithm for a neural network is
used to discover the similarities between the texture’s space
segmentation [4,5]. The performance of finding similar
models increases significantly by the discovery of
similarities [6]. An important aspect of this process is its use
on real images. The extraction of texture patterns and the
discovery of similarities are used in searching in high
dimensional digital images.As mentioned, a function to measure the similarities is
necessary; this function works in two steps: Feature
Extraction – FE and Similarity Measurement – SM.
As an example, we may consider two texture models: a
weaver model, which may be studied by frequency analysis,
and a grass model, which may be analyzed throughout
statistic descriptions [7]. Still, these models correspond to
extreme cases that do not fit in real images. The general FE
and SM methods define constrains: the pattern must be
small sized, it must correctly characterize the texture, and
the numeric value that defines similarity must be accurate
and small for similar features; in opposition, a large pattern
is needed for the other cases. Also, the features may be set
as invariant to translations and rotations, in order to accept
two textures as being equivalent, one deriving from another
by translation or rotation [8].
Gabor functions are Gaussian functions modulated by
complex sinusoids. In two dimensions, they may be defined
as follows:
III. GABOR WAVELET
This paper presents the texture analysis using Gabor
filters, evaluating also the performance in identifying
models in a large database of images representing textures.
These images are compared with other representations of
existing textures. A simple algorithm for a neural network is
used to discover the similarities between the texture’s space
segmentation [4,5]. The performance of finding similar
models increases significantly by the discovery of
similarities [6]. An important aspect of this process is its use
on real images. The extraction of texture patterns and the
discovery of similarities are used in searching in high
dimensional digital images.As mentioned, a function to measure the similarities is
necessary; this function works in two steps: Feature
Extraction – FE and Similarity Measurement – SM.
As an example, we may consider two texture models: a
weaver model, which may be studied by frequency analysis,
and a grass model, which may be analyzed throughout
statistic descriptions [7]. Still, these models correspond to
extreme cases that do not fit in real images. The general FE
and SM methods define constrains: the pattern must be
small sized, it must correctly characterize the texture, and
the numeric value that defines similarity must be accurate
and small for similar features; in opposition, a large pattern
is needed for the other cases. Also, the features may be set
as invariant to translations and rotations, in order to accept
two textures as being equivalent, one deriving from another
by translation or rotation [8].
Gabor functions are Gaussian functions modulated by
complex sinusoids. In two dimensions, they may be defined
as follows:
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