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We developed a simple way to generate binary patterns based on spectral slopes in different frequency ranges at fluctuation-enhanced sensing. Such patterns can be considered as binary "fingerprints" of odors. The method has experimentally…

Biological Physics · Physics 2010-01-26 Hung-Chih Chang , Laszlo B. Kish , Maria D. King , Chiman Kwan

Fluctuation enhanced sensing (FES) is a promising method to improve the selectivity and sensitivity of semiconductor and nanotechnology gas sensors. Most measurement setups include high cost signal conditioning and data acquisition units as…

Instrumentation and Detectors · Physics 2014-05-07 Robert Mingesz , Gergely Vadai , Zoltan Gingl

The goal of this paper is to explore the possibility to detect and identify bacteria by sensing their odor via fluctuation-enhanced sensing with commercial Taguchi sensors. The fluctuations of the electrical resistance during exposure to…

Instrumentation and Detectors · Physics 2009-01-23 Hung-Chih Chang , Laszlo B. Kish , Maria D. King , Chiman Kwan

We survey and show our earlier results about three different ways of fluctuation-enhanced sensing of bio agent, the phage-based method for bacterium detection published earlier; sensing and evaluating the odors of microbes; and spectral and…

We discuss some of the fundamental practical limitations of the Fluctuation-Enhanced Sensing of odors and gases. We address resolution, measurement speed, reproducibility, memory and other problems such as humidity. Various techniques and…

Signal Processing · Electrical Eng. & Systems 2021-01-18 Graziella Scandurra , Janusz Smulko , Laszlo B. Kish

Signal-quality awareness has been found to increase recognition rates and to support decisions in multisensor environments significantly. Nevertheless, automatic quality assessment is still an open issue. Here, we study the orientation…

Computer Vision and Pattern Recognition · Computer Science 2022-11-28 Hartwig Fronthaler , Klaus Kollreider , Josef Bigun , Julian Fierrez , Fernando Alonso-Fernandez , Javier Ortega-Garcia , Joaquin Gonzalez-Rodriguez

Selectivity of olfactory receptor neuron (ORN) is compared with that of its receptor proteins (R) with fluctuations of odor binding-releasing process taken into account. The binding-releasing process is modeled as N Bernoulli trials, where…

Biological Physics · Physics 2022-07-20 A. Vidybida

Human fingerprints are reliable characteristics for personnel identification as it is unique and persistence. A fingerprint pattern consists of ridges, valleys and minutiae. In this paper we propose Fingerprint Verification based on Gabor…

Cryptography and Security · Computer Science 2009-12-08 B N Lavanya , K B Raja , K R Venugopal

Fluctuation-enhanced sensing comprises the analysis of the stochastic component of the sensor signal and the utilization of the microscopic dynamics of the interaction between the agent and the sensor. We study the relationship between the…

Data Analysis, Statistics and Probability · Physics 2012-07-13 P. Makra , Z. Topalian , C. G. Granqvist , L. B. Kish , C. Kwan

Identification of suspects based on partial and smudged fingerprints, commonly referred to as fingermarks or latent fingerprints, presents a significant challenge in the field of fingerprint recognition. Although fixed-length embeddings…

Computer Vision and Pattern Recognition · Computer Science 2024-09-19 Abdul Wahab , Tariq Mahmood Khan , Shahzaib Iqbal , Bandar AlShammari , Bandar Alhaqbani , Imran Razzak

Facial expression has a significant role in analyzing human cognitive state. Deriving an accurate facial appearance representation is a critical task for an automatic facial expression recognition application. This paper provides a new…

Computer Vision and Pattern Recognition · Computer Science 2018-07-25 Monu Verma , Prafulla Saxena , Santosh. K. Vipparthi , Gridhari Singh

We propose a new gradient-based method for the extraction of the orientation field associated to a fingerprint, and a regularisation procedure to improve the orientation field computed from noisy fingerprint images. The regularisation…

Computer Vision and Pattern Recognition · Computer Science 2017-11-10 Pierluigi Maponi , Riccardo Piergallini , Filippo Santarelli

We describe an algorithm to enhance and binarize a fingerprint image. The algorithm is based on accurate determination of orientation flow of the ridges of the fingerprint image by computing variance of the neighborhood pixels around a…

Computer Vision and Pattern Recognition · Computer Science 2009-07-03 Simant Dube

In this paper we propose a novel fingerprint indexing approach for speeding up in the fingerprint recognition system. What kind of features are used for indexing and how to employ the extracted features for searching are crucial for the…

Computer Vision and Pattern Recognition · Computer Science 2018-11-22 Gwang-Il Ri , Chol-Gyun Ri , Su-Rim Ji

Backdoor-based fingerprinting has emerged as an effective technique for tracing the ownership of large language models. However, in real-world deployment scenarios, developers often instantiate multiple downstream models from a shared base…

Cryptography and Security · Computer Science 2025-08-27 Zhenhua Xu , Qichen Liu , Zhebo Wang , Wenpeng Xing , Dezhang Kong , Mohan Li , Meng Han

Fingerprint recognition techniques are immensely dependent on quality of the fingerprint images. To improve the performance of recognition algorithm for poor quality images an efficient enhancement algorithm should be designed. Performance…

Computer Vision and Pattern Recognition · Computer Science 2018-05-22 Ram Prakash Sharma , Somnath Dey

We present a short survey on fluctuation-enhanced gas sensing. We compare some of its main characteristics with those of classical sensing. We address the problem of linear response, information channel capacity, missed alarms and false…

General Physics · Physics 2009-11-13 L. B. Kish , G. Schmera , Ch. Kwan , J. Smulko , P. Heszler , C. -G. Granqvist

Fingerprint recognition requires a minimal effort from the user, does not capture other information than strictly necessary for the recognition process, and provides relatively good performance. A critical step in fingerprint identification…

Computer Vision and Pattern Recognition · Computer Science 2014-02-21 Amira Mohammad Abdel-Mawgoud Saleh

Fingerprint evidence plays an important role in a criminal investigation for the identification of individuals. Although various techniques have been proposed for fingerprint classification and feature extraction, automated fingerprint…

Computer Vision and Pattern Recognition · Computer Science 2023-05-30 Ibrahim Yilmaz , Mahmoud Abouyoussef

Latent fingerprints are usually processed with Automated Fingerprint Identification Systems (AFIS) by law enforcement agencies to narrow down possible suspects from a criminal database. AFIS do not commonly use all discriminatory features…

Computer Vision and Pattern Recognition · Computer Science 2020-10-19 Ram P. Krish , Julian Fierrez , Daniel Ramos , Fernando Alonso-Fernandez , Josef Bigun
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