Search Results for author: Ajay Kumar

Found 16 papers, 6 papers with code

A Characteristic Function-Based Method for Bottom-Up Human Pose Estimation

no code implementations CVPR 2023 Haoxuan Qu, Yujun Cai, Lin Geng Foo, Ajay Kumar, Jun Liu

Therefore, via minimizing the distance between the two characteristic functions, we can optimize the model to provide a more accurate localization result for the body joints in different sub-regions of the predicted heatmap.

Pose Estimation

Think Twice Before Detecting GAN-Generated Fake Images From Their Spectral Domain Imprints

no code implementations CVPR 2022 Chengdong Dong, Ajay Kumar, Eryun Liu

We show from our experiments that the artifacts in frequency spectrum of such fake images can be mitigated by proposed methods, which leads to the sharp decrease of performance of spectrum-based detectors.

Generative Adversarial Network

Accurate 3D Finger Knuckle Recognition Using Auto-Generated Similarity Functions

1 code implementation13 Jan 2021 Kevin H. M. Cheng, Ajay Kumar

This article advances the state-of-the-art method by introducing a new curvature based feature descriptor and a method to compute the similarity functions based on the statistical distribution of the encoded feature space.

Deep Feature Collaboration for Challenging 3D Finger Knuckle Identification

1 code implementation9 Oct 2020 Kevin H. M. Cheng, Ajay Kumar

This paper attempts to address the above challenges and introduces a new deep neural network based approach for the contactless 3D finger knuckle identification.

Object Recognition

Efficient and Accurate 3D Finger Knuckle Matching Using Surface Key Points

1 code implementation9 Sep 2020 Kevin H. M. Cheng, Ajay Kumar

The current 3D finger knuckle recognition methods are limited by computationally complex or inefficient matching algorithms, which attempt to compute the matching scores from all possible translational and rotational parameters for matching a pair of templates.

Contactless Biometric Identification using 3D Finger Knuckle Patterns

1 code implementation1 Aug 2020 Kevin H. M. Cheng, Ajay Kumar

Although our feature descriptor is designed for 3D finger knuckle patterns, it is also attractive for other hand-based biometric identifiers with similar patterns such as the palmprint and fingerprint.

Segmentation-Aware and Adaptive Iris Recognition

no code implementations31 Dec 2019 Kuo Wang, Ajay Kumar

The periocular information is inherently embedded in such iris images and can be exploited to assist in the iris recognition under such non-ideal scenarios.

Iris Recognition Segmentation

A Collaborative Approach using Ridge-Valley Minutiae for More Accurate Contactless Fingerprint Identification

no code implementations13 Sep 2019 Ritesh Vyas, Ajay Kumar

This paper develops a new approach to significantly improve contactless fingerprint matching capabilities available today.

Matrix Product State Based Quantum Classifier

no code implementations4 May 2019 Amandeep Singh Bhatia, Mandeep Kaur Saggi, Ajay Kumar, Sushma Jain

In this paper, we have shown that matrix product state as one-dimensional array of tensors can be used to classify classical and quantum data.

Binary Classification General Classification

A Deep Learning based Framework to Detect and Recognize Humans using Contactless Palmprints in the Wild

no code implementations29 Dec 2018 Yang Liu, Ajay Kumar

Contactless and online palmprint identfication offers improved user convenience, hygiene, user-security and is highly desirable in a range of applications.

Revisiting Outlier Rejection Approach for Non-Lambertian Photometric Stereo

1 code implementation11 Oct 2018 Kevin H. M. Cheng, Ajay Kumar

This paper presents two novel outlier rejection techniques that attempt to identify the data that are more reliable and likely to be Lambertian.

Towards Contactless, Low-Cost and Accurate 3D Fingerprint Identification

no code implementations CVPR 2013 Ajay Kumar, Cyril Kwong

In order to avail the benefits of higher user convenience, hygiene, and improved accuracy, contactless 3D fingerprint recognition techniques have recently been introduced.

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