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The quality of a wood log in the wood industry depends heavily on the presence of both outer and inner defects, including inner knots that are a result of the growth of tree branches. Today, locating the inner knots require the use of…

Computer Vision and Pattern Recognition · Computer Science 2023-08-23 Salim Khazem , Jeremy Fix , Cédric Pradalier

Knots in wood are critical to both aesthetics and structural integrity, making their detection and pairing essential in timber processing. However, traditional manual annotation was labor-intensive and inefficient, necessitating automation.…

Computer Vision and Pattern Recognition · Computer Science 2025-05-12 Guohao Lin , Shidong Pan , Rasul Khanbayov , Changxi Yang , Ani Khaloian-Sarnaghi , Andriy Kovryga

In this work, we propose a novel method to synthetically generate realistic 3D representations of wooden logs. Efficient sawmilling heavily relies on accurate measurement of logs and the distribution of knots inside them. Computed…

Computer Vision and Pattern Recognition · Computer Science 2025-03-19 Fedor Zolotarev , Borek Reich , Tuomas Eerola , Tomi Kauppi , Pavel Zemcik

In sawmills, it is essential to accurately measure the raw material, i.e. wooden logs, to optimise the sawing process. Earlier studies have shown that accurate predictions of the inner structure of the logs can be obtained using just…

Computer Vision and Pattern Recognition · Computer Science 2025-03-19 Fedor Zolotarev , Tuomas Eerola , Tomi Kauppi

While general object detection has seen tremendous progress, localization of elliptical objects has received little attention in the literature. Our motivating application is the detection of knots in sawn timber images, which is an…

Computer Vision and Pattern Recognition · Computer Science 2020-11-11 Shenyi Pan , Shuxian Fan , Samuel W. K. Wong , James V. Zidek , Helge Rhodin

In the industry, the value of wood-logs strongly depends on their internal structure and more specifically on the knots' distribution inside the trees. As of today, CT-scanners are the prevalent tool to acquire accurate images of the trees…

Computer Vision and Pattern Recognition · Computer Science 2020-10-08 Mejri Mohamed , Antoine Richard , Cedric Pradalier

When assessing the strength of sawn lumber for use in engineering applications, the sizes and locations of knots are an important consideration. Knots are the most common visual characteristics of lumber, that result from the growth of tree…

Applications · Statistics 2023-02-16 Shuxian Fan , Samuel W. K. Wong , James V. Zidek

In the wood industry, logs are commonly quality screened by discrete X-ray scans on a moving conveyor belt from a few source positions. Typically, the measurements are obtained in a single two-dimensional (2D) plane (a "slice") by a…

Artificial Intelligence · Computer Science 2025-10-01 Buda Bajić , Johannes A. J. Huber , Benedikt Neyses , Linus Olofsson , Ozan Öktem

Efficiently detecting target weld seams while ensuring sub-millimeter accuracy has always been an important challenge in autonomous welding, which has significant application in industrial practice. Previous works mostly focused on…

Computer Vision and Pattern Recognition · Computer Science 2024-08-21 Pengkun Wei , Shuo Cheng , Dayou Li , Ran Song , Yipeng Zhang , Wei Zhang

Forward uncertainty quantification in dynamical systems is challenging due to non-smooth or locally oscillating nonlinear behaviors. Spline dimensional decomposition (SDD) addresses such nonlinearity by partitioning input coordinates via…

Machine Learning · Statistics 2025-06-18 Yeonsu Kim , Junhan Lee , Bingran Wang , John T. Hwang , Dongjin Lee

In industrial applications, it is common to scan objects on a moving conveyor belt. If slice-wise 2D computed tomography (CT) measurements of the moving object are obtained we call it a sequential scanning geometry. In this case, each slice…

Signal Processing · Electrical Eng. & Systems 2023-11-10 Sebastian Springer , Aldo Glielmo , Angelina Senchukova , Tomi Kauppi , Jarkko Suuronen , Lassi Roininen , Heikki Haario , Andreas Hauptmann

Wood-composite materials are widely used today as they homogenize humidity related directional deformations. Quantification of these deformations as coefficients is important for construction and engineering and topic of current research…

Computer Vision and Pattern Recognition · Computer Science 2018-02-14 Markus Hofinger , Thomas Pock , Thomas Moosbrugger

Dents on the aircraft skin are frequent and may easily go undetected during airworthiness checks, as their inspection process is tedious and extremely subject to human factors and environmental conditions. Nowadays, 3D scanning technologies…

Computer Vision and Pattern Recognition · Computer Science 2023-02-27 Pasquale Lafiosca , Ip-Shing Fan , Nicolas P. Avdelidis

Spot welding is a crucial process step in various industries. However, classification of spot welding quality is still a tedious process due to the complexity and sensitivity of the test material, which drain conventional approaches to its…

Computer Vision and Pattern Recognition · Computer Science 2020-10-27 Linh Kästner , Samim Ahmadi , Florian Jonietz , Mathias Ziegler , Peter Jung , Giuseppe Caire , Jens Lambrecht

In astrophysical and cosmological analyses, the increasing quality and volume of astronomical data demand efficient and precise computational tools. This work introduces a novel adaptive algorithm for automatic knots (AutoKnots) allocation…

Instrumentation and Methods for Astrophysics · Physics 2025-06-12 Sandro D. P. Vitenti , Fernando de Simoni , Mariana Penna-Lima , Eduardo J. Barroso

Lung cancer is highly lethal, emphasizing the critical need for early detection. However, identifying lung nodules poses significant challenges for radiologists, who rely heavily on their expertise for accurate diagnosis. To address this…

Image and Video Processing · Electrical Eng. & Systems 2023-10-17 Hossein Jafari , Karim Faez , Hamidreza Amindavar

In the woodworking industry, a huge amount of effort has to be invested into the initial quality assessment of the raw material. In this study we present an AI model to detect, quantify and localize defects on wooden logs. This model aims…

Computer Vision and Pattern Recognition · Computer Science 2024-10-01 Roland Kammerbauer , Thomas H. Schmitt , Tobias Bocklet

Safe manipulation in unstructured environments for service robots is a challenging problem. A failure detection system is needed to monitor and detect unintended outcomes. We propose FINO-Net, a novel multimodal sensor fusion based deep…

Robotics · Computer Science 2021-08-02 Arda Inceoglu , Eren Erdal Aksoy , Abdullah Cihan Ak , Sanem Sariel

Industrial quality inspection plays a critical role in modern manufacturing by identifying defective products during production. While single-modality approaches using either 3D point clouds or 2D RGB images suffer from information…

Image and Video Processing · Electrical Eng. & Systems 2025-07-30 Chengyu Tao , Xuanming Cao , Juan Du

The wood processing industry, particularly in facilities such as sawmills and MDF production lines, requires accurate and efficient identification of species and thickness of the wood. Although traditional methods rely heavily on expert…

Computer Vision and Pattern Recognition · Computer Science 2025-07-24 Fatemeh Hasanzadeh Fard , Sanaz Hasanzadeh Fard , Mehdi Jonoobi
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