54 citations · 195 across the 76 of their papers we have counts for
87 papers
Enhancing Cross-Grade Generalization in Banana Variety Classification via Hybrid CNN-Transformers and Knowledge Self-Distillation
Khush Kataruka, Mohammad Muzammila, Zahid Akhtar +2
In recent years, automated fruit classification systems have become a more critical component in precision agriculture for efficient yield estimation, quality control, and supply c…
WaveSpec: Multi-Spectral Iris Presentation Attack Detection via Wavelength-Conditioned Spectral Coherence Adaptation
Raghavendra Ramachandra
Multispectral iris presentation attack detection benefits from observing the same iris across multiple near-infrared wavelengths, but existing methods often use wavelength informat…
OpenVeinNet: Robust Open-Set Finger Vein Verification with Dynamic Snake Convolution and Graph Learning
Sushrut Patwardhan, Raghavendra Ramachandra
Finger vein verification is a promising biometric modality for secure authentication because vascular patterns are internal, difficult to observe externally, and relatively resista…
From Forgeries to Foundation Models: A Systematic Survey of Identity Document Attack and Detection
Gourab Das, Pavan Kumar C, Raghavendra Ramachandra
Identity document forgery has undergone a fundamental capability shift: generative AI tools now enable high-fidelity document synthesis and field-level manipulation with minimal te…
A Systematic Failure Analysis of Vision Foundation Models for Open Set Iris Presentation Attack Detection
Rahul Anand, Siddharth Singh, Dileep A D +2
Vision foundation models have demonstrated strong transferability across diverse visual recognition tasks and are increasingly considered for biometric applications. Their suitabil…
DCMorph: Face Morphing via Dual-Stream Cross-Attention Diffusion
Tahar Chettaoui, Eduarda Caldeira, Guray Ozgur +3
Advancing face morphing attack techniques is crucial to anticipate evolving threats and develop robust defensive mechanisms for identity verification systems. This work introduces…
R-FLoRA: Residual-Statistic-Gated Low-Rank Adaptation for Single-Image Face Morphing Attack Detection
Raghavendra Ramachandra
Face morphing attacks pose a substantial risk to the reliability of face recognition systems used in passport issuance, border control, and digital identity verification. Detecting…
The Fourth Challenge on Image Super-Resolution (4) at NTIRE 2026: Benchmark Results and Method Overview
Zheng Chen, Kai Liu, Jingkai Wang +150
This paper presents the NTIRE 2026 image super-resolution (4) challenge, one of the associated competitions of the NTIRE 2026 Workshop at CVPR 2026. The challenge aims to r…
Time-Domain Voice Identity Morphing (TD-VIM): A Signal-Level Approach to Morphing Attacks on Speaker Verification Systems
Aravinda Reddy PN, Raghavendra Ramachandra, K. Sreenivasa Rao +2
In biometric systems, it is a common practice to associate each sample or template with a specific individual. Nevertheless, recent studies have demonstrated the feasibility of gen…
SpectraIrisPAD: Leveraging Vision Foundation Models for Spectrally Conditioned Multispectral Iris Presentation Attack Detection
Raghavendra Ramachandra, Sushma Venkatesh
Iris recognition is widely recognized as one of the most accurate biometric modalities. However, its growing deployment in real-world applications raises significant concerns regar…
CLRecogEye : Curriculum Learning towards exploiting convolution features for Dynamic Iris Recognition
Geetanjali Sharma, Gaurav Jaswal, Aditya Nigam +1
Iris authentication algorithms have achieved impressive recognition performance, making them highly promising for real-world applications such as border control, citizen identifica…
LatentPrintFormer: A Hybrid CNN-Transformer with Spatial Attention for Latent Fingerprint identification
Arnab Maity, Manasa, Pavan Kumar C +1
Latent fingerprint identification remains a challenging task due to low image quality, background noise, and partial impressions. In this work, we propose a novel identification ap…
Introducing Nylon Face Mask Attacks: A Dataset for Evaluating Generalised Face Presentation Attack Detection
Manasa, Sushrut Patwardhan, Narayan Vetrekar +3
Face recognition systems are increasingly deployed across a wide range of applications, including smartphone authentication, access control, and border security. However, these sys…
StableMorph: High-Quality Face Morph Generation with Stable Diffusion
Wassim Kabbani, Kiran Raja, Raghavendra Ramachandra +1
Face morphing attacks threaten the integrity of biometric identity systems by enabling multiple individuals to share a single identity. To develop and evaluate effective morphing a…
Privacy-enhancing Sclera Segmentation Benchmarking Competition: SSBC 2025
Matej Vitek, Darian Tomašević, Abhijit Das +32
This paper presents a summary of the 2025 Sclera Segmentation Benchmarking Competition (SSBC), which focused on the development of privacy-preserving sclera-segmentation models tra…
Empowering Morphing Attack Detection using Interpretable Image-Text Foundation Model
Sushrut Patwardhan, Raghavendra Ramachandra, Sushma Venkatesh
Morphing attack detection has become an essential component of face recognition systems for ensuring a reliable verification scenario. In this paper, we present a multimodal learni…
Second Competition on Presentation Attack Detection on ID Card
Juan E. Tapia, Mario Nieto, Juan M. Espin +30
This work summarises and reports the results of the second Presentation Attack Detection competition on ID cards. This new version includes new elements compared to the previous on…
Towards Zero-Shot Differential Morphing Attack Detection with Multimodal Large Language Models
Ria Shekhawat, Hailin Li, Raghavendra Ramachandra +1
Leveraging the power of multimodal large language models (LLMs) offers a promising approach to enhancing the accuracy and interpretability of morphing attack detection (MAD), espec…
NTIRE 2025 Challenge on Image Super-Resolution (x4): Methods and Results
Zheng Chen, Kai Liu, Jue Gong +108
This paper presents the NTIRE 2025 image super-resolution (4) challenge, one of the associated competitions of the 10th NTIRE Workshop at CVPR 2025. The challenge aims to r…
ColFigPhotoAttnNet: Reliable Finger Photo Presentation Attack Detection Leveraging Window-Attention on Color Spaces
Anudeep Vurity, Emanuela Marasco, Raghavendra Ramachandra +1
Finger photo Presentation Attack Detection (PAD) can significantly strengthen smartphone device security. However, these algorithms are trained to detect certain types of attacks.…
Generating Realistic Forehead-Creases for User Verification via Conditioned Piecewise Polynomial Curves
Abhishek Tandon, Geetanjali Sharma, Gaurav Jaswal +2
We propose a trait-specific image generation method that models forehead creases geometrically using B-spline and Bézier curves. This approach ensures the realistic generation of b…
Generalized Single-Image-Based Morphing Attack Detection Using Deep Representations from Vision Transformer
Haoyu Zhang, Raghavendra Ramachandra, Kiran Raja +1
Face morphing attacks have posed severe threats to Face Recognition Systems (FRS), which are operated in border control and passport issuance use cases. Correspondingly, morphing a…
Demographic Variability in Face Image Quality Measures
Wassim Kabbani, Kiran Raja, Raghavendra Ramachandra +1
Face image quality assessment (FIQA) algorithms are being integrated into online identity management applications. These applications allow users to upload a face image as part of…
FaceOracle: Chat with a Face Image Oracle
Wassim Kabbani, Kiran Raja, Raghavendra Ramachandra +1
A face image is a mandatory part of ID and travel documents. Obtaining high-quality face images when issuing such documents is crucial for both human examiners and automated face r…