ZCAwhiten

this function performs zca-whitening to a 2- or 3- dimensional image

Incorporates functions for image preprocessing, filtering and image recognition. The package takes advantage of 'RcppArmadillo' to speed up computationally intensive functions. The histogram of oriented gradients descriptor is a modification of the 'findHOGFeatures' function of the 'SimpleCV' computer vision platform, the average_hash(), dhash() and phash() functions are based on the 'ImageHash' python library. The Gabor Feature Extraction functions are based on 'Matlab' code of the paper, "CloudID: Trustworthy cloud-based and cross-enterprise biometric identification" by M. Haghighat, S. Zonouz, M. Abdel-Mottaleb, Expert Systems with Applications, vol. 42, no. 21, pp. 7905-7916, 2015, <doi:10.1016/j.eswa.2015.06.025>. The 'SLIC' and 'SLICO' superpixel algorithms were explained in detail in (i) "SLIC Superpixels Compared to State-of-the-art Superpixel Methods", Radhakrishna Achanta, Appu Shaji, Kevin Smith, Aurelien Lucchi, Pascal Fua, and Sabine Suesstrunk, IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 34, num. 11, p. 2274-2282, May 2012, <doi:10.1109/TPAMI.2012.120> and (ii) "SLIC Superpixels", Radhakrishna Achanta, Appu Shaji, Kevin Smith, Aurelien Lucchi, Pascal Fua, and Sabine Suesstrunk, EPFL Technical Report no. 149300, June 2010.

Lampros Mouselimis

OpenImageR

An Image Processing Toolkit

Sight Machine

Johannes Buchner

Mohammad Haghighat

Radhakrishna Achanta

Oleh Onyshchak

ZCAwhiten function

<dl><dt>image</dt>
<dd>a matrix, data frame or 3-dimensional array where the third dimension is equal to 3</dd>
<dt>k</dt>
<dd>an integer specifying the number of components to keep when svd is performed (reduced dimension representation of the data)</dd>
<dt>epsilon</dt>
<dd>a float specifying the regularization parameter</dd></dl>

Arguments

zca whiten of an image — ZCAwhiten

<dl>

<dt>image</dt>
<dd>a matrix, data frame or 3-dimensional array where the third dimension is equal to 3</dd>


<dt>k</dt>
<dd>an integer specifying the number of components to keep when svd is performed (reduced dimension representation of the data)</dd>


<dt>epsilon</dt>
<dd>a float specifying the regularization parameter</dd>

</dl>

ZCAwhiten: zca whiten of an image

Description

Usage

Value

Arguments

Details

References

Examples