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Image Quality Assessment (IQA) models aim to predict perceptual image quality in alignment with human judgments. No-Reference (NR) IQA remains particularly challenging due to the absence of a reference image. While deep learning has…

Image and Video Processing · Electrical Eng. & Systems 2025-07-18 Rajesh Sureddi , Saman Zadtootaghaj , Nabajeet Barman , Alan C. Bovik

While recent advancements in large multimodal models (LMMs) have significantly improved their abilities in image quality assessment (IQA) relying on absolute quality rating, how to transfer reliable relative quality comparison outputs to…

Computer Vision and Pattern Recognition · Computer Science 2024-05-30 Hanwei Zhu , Haoning Wu , Yixuan Li , Zicheng Zhang , Baoliang Chen , Lingyu Zhu , Yuming Fang , Guangtao Zhai , Weisi Lin , Shiqi Wang

No-Reference Image Quality Assessment (NR-IQA), responsible for assessing the quality of a single input image without using any reference, plays a critical role in evaluating and optimizing computer vision systems, e.g., low-light…

Computer Vision and Pattern Recognition · Computer Science 2025-02-24 Yi Yu , Song Xia , Xun Lin , Wenhan Yang , Shijian Lu , Yap-peng Tan , Alex Kot

A facial morph is an image created by combining two (or more) face images pertaining to two (or more) distinct identities. Reference-free face demorphing inverts the process and tries to recover the face images constituting a facial morph…

Computer Vision and Pattern Recognition · Computer Science 2025-01-22 Nitish Shukla , Arun Ross

We propose a novel certified defense method for Image Quality Assessment (IQA) models based on randomized smoothing with noise applied in the feature space rather than the input space. Unlike prior approaches that inject Gaussian noise…

Computer Vision and Pattern Recognition · Computer Science 2025-08-08 Ekaterina Shumitskaya , Dmitriy Vatolin , Anastasia Antsiferova

An accurate computational model for image quality assessment (IQA) benefits many vision applications, such as image filtering, image processing, and image generation. Although the study of face images is an important subfield in computer…

Computer Vision and Pattern Recognition · Computer Science 2023-08-01 Shaolin Su , Hanhe Lin , Vlad Hosu , Oliver Wiedemann , Jinqiu Sun , Yu Zhu , Hantao Liu , Yanning Zhang , Dietmar Saupe

With the inclusion of camera in daily life, an automatic no reference image quality evaluation index is required for automatic classification of images. The present manuscripts proposes a new No Reference Regional Mutual Information based…

Computer Vision and Pattern Recognition · Computer Science 2023-01-18 Vinay Kumar , Vivek Singh Bawa , Rahul Upadhyay

No-Reference Image Quality Assessment (NR-IQA) focuses on designing methods to measure image quality in alignment with human perception when a high-quality reference image is unavailable. Most state-of-the-art NR-IQA approaches are…

Computer Vision and Pattern Recognition · Computer Science 2025-03-11 Lorenzo Agnolucci , Leonardo Galteri , Marco Bertini

In this paper we develop FaceQgen, a No-Reference Quality Assessment approach for face images based on a Generative Adversarial Network that generates a scalar quality measure related with the face recognition accuracy. FaceQgen does not…

Computer Vision and Pattern Recognition · Computer Science 2022-01-04 Javier Hernandez-Ortega , Julian Fierrez , Ignacio Serna , Aythami Morales

Quality assessment of videos is crucial for many computer graphics applications, including video games, virtual reality, and augmented reality, where visual performance has a significant impact on user experience. When test videos cannot be…

Computer Vision and Pattern Recognition · Computer Science 2025-10-16 Sipeng Yang , Jiayu Ji , Qingchuan Zhu , Zhiyao Yang , Xiaogang Jin

Existing face restoration models have relied on general assessment metrics that do not consider the characteristics of facial regions. Recent works have therefore assessed their methods using human studies, which is not scalable and…

Computer Vision and Pattern Recognition · Computer Science 2025-11-20 Byungho Jo , Donghyeon Cho , In Kyu Park , Sungeun Hong

Recently, increasing interest has been drawn in exploiting deep convolutional neural networks (DCNNs) for no-reference image quality assessment (NR-IQA). Despite of the notable success achieved, there is a broad consensus that training…

Image and Video Processing · Electrical Eng. & Systems 2020-04-14 Hancheng Zhu , Leida Li , Jinjian Wu , Weisheng Dong , Guangming Shi

Image quality assessment (IQA) focuses on the perceptual visual quality of images, playing a crucial role in downstream tasks such as image reconstruction, compression, and generation. The rapid advancement of multi-modal large language…

Computer Vision and Pattern Recognition · Computer Science 2025-05-26 Weiqi Li , Xuanyu Zhang , Shijie Zhao , Yabin Zhang , Junlin Li , Li Zhang , Jian Zhang

Face Image Quality Assessment (FIQA) is essential for reliable face recognition systems. Current approaches primarily exploit only final-layer representations, while training-free methods require multiple forward passes or backpropagation.…

Computer Vision and Pattern Recognition · Computer Science 2026-01-12 Guray Ozgur , Eduarda Caldeira , Tahar Chettaoui , Jan Niklas Kolf , Marco Huber , Naser Damer , Fadi Boutros

Neural View Synthesis (NVS) has demonstrated efficacy in generating high-fidelity dense viewpoint videos using a image set with sparse views. However, existing quality assessment methods like PSNR, SSIM, and LPIPS are not tailored for the…

Computer Vision and Pattern Recognition · Computer Science 2024-12-12 Qiang Qu , Hanxue Liang , Xiaoming Chen , Yuk Ying Chung , Yiran Shen

Super-resolution (SR) applied to real-world low-resolution (LR) images often results in complex, irregular degradations that stem from the inherent complexity of natural scene acquisition. In contrast to SR artifacts arising from synthetic…

Computer Vision and Pattern Recognition · Computer Science 2026-02-12 Kian Majlessi , Amir Masoud Soltani , Mohammad Ebrahim Mahdavi , Aurelien Gourrier , Peyman Adibi

The quality of face images significantly influences the performance of underlying face recognition algorithms. Face image quality assessment (FIQA) estimates the utility of the captured image in achieving reliable and accurate recognition…

Computer Vision and Pattern Recognition · Computer Science 2023-03-14 Fadi Boutros , Meiling Fang , Marcel Klemt , Biying Fu , Naser Damer

As super-resolution (SR) techniques advance, we observe a growing distrust of evaluation metrics in recent SR research. An inconsistency often emerges between certain evaluation criteria and human perceptual preference. Although current SR…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Shaolin Su , Josep M. Rocafort , Danna Xue , David Serrano-Lozano , Lei Sun , Javier Vazquez-Corral

Deep Video Quality Assessment (VQA) methods have shown impressive high-performance capabilities. Notably, no-reference (NR) VQA methods play a vital role in situations where obtaining reference videos is restricted or not feasible.…

Image and Video Processing · Electrical Eng. & Systems 2024-07-31 Xiaoheng Tan , Jiabin Zhang , Yuhui Quan , Jing Li , Yajing Wu , Zilin Bian

Neural View Synthesis (NVS), such as NeRF and 3D Gaussian Splatting, effectively creates photorealistic scenes from sparse viewpoints, typically evaluated by quality assessment methods like PSNR, SSIM, and LPIPS. However, these…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Qiang Qu , Yiran Shen , Xiaoming Chen , Yuk Ying Chung , Weidong Cai , Tongliang Liu