Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Differential Morph Face Detection using Discriminative Wavelet Sub-bands   Face recognition systems are extremely vulnerable to morphing attacks, in
which a morphed facial reference image can be successfully verified as two or
more distinct identities. In this paper, we propose a morph attack detection
algorithm that leverages an undecimated 2D Discrete Wavelet Transform (DWT) for
identifying morphed face images. The core of our framework is that artifacts
resulting from the morphing process that are not discernible in the image
domain can be more easily identified in the spatial frequency domain. A
discriminative wavelet sub-band can accentuate the disparity between a real and
a morphed image. To this end, multi-level DWT is applied to all images,
yielding 48 mid and high-frequency sub-bands each. The entropy distributions
for each sub-band are calculated separately for both bona fide and morph
images. For some of the sub-bands, there is a marked difference between the
entropy of the sub-band in a bona fide image and the identical sub-band's
entropy in a morphed image. Consequently, we employ Kullback-Liebler Divergence
(KLD) to exploit these differences and isolate the sub-bands that are the most
discriminative. We measure how discriminative a sub-band is by its KLD value
and the 22 sub-bands with the highest KLD values are chosen for network
training. Then, we train a deep Siamese neural network using these 22 selected
sub-bands for differential morph attack detection. We examine the efficacy of
discriminative wavelet sub-bands for morph attack detection and show that a
deep neural network trained on these sub-bands can accurately identify morph
imagery.

24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th