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A computationally-simplified and descriptor-richer Point Cloud Quality Assessment (PCQA) metric, namely PointPCA+, is proposed in this paper, which is an extension of PointPCA. PointPCA proposed a set of perceptually-relevant descriptors…

计算机视觉与模式识别 · 计算机科学 2023-11-27 Xuemei Zhou , Evangelos Alexiou , Irene Viola , Pablo Cesar

Visual control policies can encounter significant performance degradation when visual conditions like lighting or camera position differ from those seen during training -- often exhibiting sharp declines in capability even for minor…

机器人学 · 计算机科学 2024-04-30 Skand Peri , Iain Lee , Chanho Kim , Li Fuxin , Tucker Hermans , Stefan Lee

Super-resolution (SR), a classical inverse problem in computer vision, is inherently ill-posed, inducing a distribution of plausible solutions for every input. However, the desired result is not simply the expectation of this distribution,…

计算机视觉与模式识别 · 计算机科学 2025-04-28 Fengjia Zhang , Samrudhdhi B. Rangrej , Tristan Aumentado-Armstrong , Afsaneh Fazly , Alex Levinshtein

This paper presents a CAD-based approach for automated surface defect detection. We leverage the a-priori knowledge embedded in a CAD model and integrate it with point cloud data acquired from commercially available stereo and depth…

计算机视觉与模式识别 · 计算机科学 2025-01-31 Matteo Dalle Vedove , Matteo Bonetto , Edoardo Lamon , Luigi Palopoli , Matteo Saveriano , Daniele Fontanelli

Vision-Language Models (VLMs) are increasingly used in document processing pipelines to convert flowchart images into structured code (e.g., Mermaid). In production, these systems process arbitrary inputs for which no ground-truth code…

计算机视觉与模式识别 · 计算机科学 2026-02-17 Giang Son Nguyen , Zi Pong Lim , Sarthak Ketanbhai Modi , Yon Shin Teo , Wenya Wang

In this letter, a very simple no-reference image quality assessment (NR-IQA) model for JPEG compressed images is proposed. The proposed metric called median of unique gradients (MUG) is based on the very simple facts of unique gradient…

计算机视觉与模式识别 · 计算机科学 2016-09-20 Hossein Ziaei Nafchi , Atena Shahkolaei , Rachid Hedjam , Mohamed Cheriet

Although color is a fundamental feature of human visual perception, it has been largely unexplored in the reduced-reference (RR) image quality assessment (IQA) schemes. In this paper, we propose a natural scene statistic (NSS) method, which…

计算机视觉与模式识别 · 计算机科学 2014-12-01 Mounir Omari , Mohammed El Hassouni , Abdelkaher Ait Abdelouahad , Hocine Cherifi

Recent progress on 2D object detection has featured Cascade RCNN, which capitalizes on a sequence of cascade detectors to progressively improve proposal quality, towards high-quality object detection. However, there has not been evidence in…

计算机视觉与模式识别 · 计算机科学 2022-11-16 Qi Cai , Yingwei Pan , Ting Yao , Tao Mei

Accurate face recognition systems are increasingly important in sensitive applications like border control or migration management. Therefore, it becomes crucial to quantify the quality of facial images to ensure that low-quality images are…

计算机视觉与模式识别 · 计算机科学 2023-08-22 Marcel Grimmer , Christian Rathgeb , Raymond Veldhuis , Christoph Busch

The quality assessment (QA) of restored low light images is an important tool for benchmarking and improving low light restoration (LLR) algorithms. While several LLR algorithms exist, the subjective perception of the restored images has…

图像与视频处理 · 电气工程与系统科学 2022-02-07 Vignesh Kannan , Sameer Malik , Rajiv Soundararajan

No-reference video quality assessment (NR-VQA) for gaming videos is challenging due to limited human-rated datasets and unique content characteristics including fast motion, stylized graphics, and compression artifacts. We present MTL-VQA,…

图像与视频处理 · 电气工程与系统科学 2026-02-20 Yu-Chih Chen , Michael Wang , Chieh-Dun Wen , Kai-Siang Ma , Avinab Saha , Li-Heng Chen , Alan Bovik

Current no-reference image quality assessment (NR-IQA) models for enhanced images often struggle to generalize, as they tend to overfit to the distinct patterns of specific enhancement algorithms rather than evaluating genuine perceptual…

计算机视觉与模式识别 · 计算机科学 2026-03-23 Shiqi Gao , Kang Fu , Zitong Xu , Huiyu Duan , Xiongkuo Min , Jia Wang , Guangtao Zhai

Point clouds-based Networks have achieved great attention in 3D object classification, segmentation and indoor scene semantic parsing. In terms of face recognition, 3D face recognition method which directly consume point clouds as input is…

计算机视觉与模式识别 · 计算机科学 2019-11-25 Ziyu Zhang , Feipeng Da , Yi Yu

With recent advances in deep learning, numerous algorithms have been developed to enhance video quality, reduce visual artifacts, and improve perceptual quality. However, little research has been reported on the quality assessment of…

图像与视频处理 · 电气工程与系统科学 2025-06-10 Tianhao Peng , Chen Feng , Duolikun Danier , Fan Zhang , Benoit Vallade , Alex Mackin , David Bull

Recently,vision-based robotic manipulation has garnered significant attention and witnessed substantial advancements. 2D image-based and 3D point cloud-based policy learning represent two predominant paradigms in the field, with recent…

机器人学 · 计算机科学 2025-09-23 Run Yu , Yangdi Liu , Wen-Da Wei , Chen Li

Document image quality assessment (DIQA) is an important and challenging problem in real applications. In order to predict the quality scores of document images, this paper proposes a novel no-reference DIQA method based on character…

计算机视觉与模式识别 · 计算机科学 2018-07-12 Hongyu Li , Fan Zhu , Junhua Qiu

To support the application scenarios where high-resolution (HR) images are urgently needed, various single image super-resolution (SISR) algorithms are developed. However, SISR is an ill-posed inverse problem, which may bring artifacts like…

图像与视频处理 · 电气工程与系统科学 2022-06-10 Zicheng Zhang , Wei Sun , Xiongkuo Min , Wenhan Zhu , Tao Wang , Wei Lu , Guangtao Zhai

Convolutional Neural Networks (CNNs) have emerged as a powerful strategy for most object detection tasks on 2D images. However, their power has not been fully realised for detecting 3D objects in point clouds directly without converting…

计算机视觉与模式识别 · 计算机科学 2019-12-03 Mingtao Feng , Syed Zulqarnain Gilani , Yaonan Wang , Liang Zhang , Ajmal Mian

We address the challenge of point cloud registration using color information, where traditional methods relying solely on geometric features often struggle in low-overlap and incomplete scenarios. To overcome these limitations, we propose…

计算机视觉与模式识别 · 计算机科学 2026-04-21 Jiayi Tian , Haiduo Huang , Tian Xia , Wenzhe Zhao , Pengju Ren

Point clouds are a fundamental 3D representation in computer vision, enabling a wide range of perception tasks. However, real-world point clouds often suffer from degradations such as incompleteness, noise, outliers, and irregular density,…

计算机视觉与模式识别 · 计算机科学 2026-05-26 Haoqing Wu , Alexa Nawotki , Jochen Garcke