waveletScattering2
Wavelet image scattering
Description
Use the waveletScattering2
object to create a network for a
wavelet image scattering decomposition using complex-valued 2-D Morlet
wavelets.
Creation
Description
creates a network
for a wavelet image scattering decomposition with two complex-valued 2-D Morlet filter
banks and isotropic scale invariance. Both filter banks have quality factors of one
wavelet per octave. There are six rotations linearly spaced between 0 and π radians for
each wavelet filter. By default, sf
= waveletScattering2waveletScattering2
assumes an image
input size of 128-by-128. The scale invariance is 64.
creates a network for wavelet image scattering with properties specified by one or more
sf
= waveletScattering2(Name,Value
)Name,Value
pair arguments. Properties can be specified in any order
as Name1,Value1,...,NameN,ValueN
. Enclose each property name in single
quotes (' '
) or double quotes (" "
).
Note
With the exceptions of OptimizePath
and
OversamplingFactor
, you cannot change a property value of an
existing scattering network. For example, if you create a network
sf
with ImageSize
set to [256
256]
, you cannot assign a different ImageSize
to
sf
.
Properties
Object Functions
scatteringTransform | Wavelet 2-D scattering transform |
featureMatrix | Image scattering feature matrix |
log | Natural logarithm of 2-D scattering transform |
filterbank | Wavelet and scaling filters |
littlewoodPaleySum | Littlewood-Paley sum |
coefficientSize | Size of image scattering coefficients |
numorders | Number of scattering orders |
numfilterbanks | Number of scattering filter banks |
paths | Scattering paths |
Examples
References
[1] Bruna, J., and S. Mallat. "Invariant Scattering Convolution Networks." IEEE Transactions on Pattern Analysis and Machine Intelligence. Vol. 35, Number 8, 2013, pp. 1872–1886.
[2] Sifre, L., and S. Mallat. "Rigid-Motion Scattering for Texture Classification". arXiv preprint. 2014, pp. 1–19. https://arxiv.org/abs/1403.1687.
[3] Sifre, L., and S. Mallat. "Rotation, scaling and deformation invariant scattering for texture discrimination." 2013 IEEE Conference on Computer Vision and Pattern Recognition. 2013, pp 1233–1240.
Extended Capabilities
Version History
Introduced in R2019a