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Retraction Note: Enhanced Binary Hexagonal Extrema Pattern (EBHXEP) Descriptor for Iris Liveness Detection

Rohit Agarwal1, Anand Singh Jalal1, K V Arya2

  • 1Department of Computer Engineering and Applications, GLA University, Mathura, Uttar Pradesh 281406 India.

Wireless Personal Communications
|July 31, 2026
PubMed

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IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the C=O, C=N, and C=C occur between 1600–1850 cm−1.
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