00884nas a2200121   4500000000100000008004100001100001900042700002000061700001800081245007000099856004800169520054500217       2026                            d1 aWojciech Macek1 aMateusz Korpyś1 aDariusz Pojda00aFRASTA-toolbox: An Open Source Tool for Fracture-surface Analysis  uhttps://doi.org/10.1016/j.softx.2026.1027883 aFRASTA-toolbox is an open-source application for importing, preprocessing, and analyzing three-dimensional fracture-surface scan data. It provides an implementation of the FRASTA workflow, including grid interpolation, masking, alignment, cross-sectional profile analysis, and interactive two- and three-dimensional visualization based on PyQt5 and pyqtgraph. The software supports reproducible fracture-surface analysis and is applicable to research workflows in materials science, tribology, biomedical engineering, and digital forensics.00432nas a2200145   4500000000100000008004100001100001900042700001800061700002400079700001900103700001700122700001800139245007100157856005800228       2026                            d1 aWojciech Macek1 aDariusz Pojda1 aPrzemysław Podulka1 aAntonio Mourao1 aJose Correia1 aShun-Peng Zhu00aQualitative and quantitative fractography of structural steel S235  uhttps://onlinelibrary.wiley.com/doi/10.1111/ffe.7048801927nas a2200157   4500000000100000008004100001100002600042700002100068700002200089700002000111700002300131700001800154245012900172856003700301520143100338       2026                            d1 aAgnieszka Anna Tomaka1 aKrzysztof Domino1 aMichał Tarnawski1 aEmil Kalinowski1 aMałgorzata Domino1 aDariusz Pojda00aSimulation of temporomandibular joint space changes based on rigid-body transformation using virtual and semi-virtual models  uhttps://arxiv.org/abs/2604.253223 aThe integration of multimodal data within a common coordinate system is essential for spatial analysis of the stomatognathic system. This study aims to develop a multimodal data integration methodology for digital modeling of spatial changes in the temporomandibular joint (TMJ) across various mandible positions. A transformation tree framework was proposed to integrate CBCT, facial, and dental representation images into a common coordinate system and to simulate seven mandible positions using rigid-body transformations. Two proprietary models were applied. Spatial changes in mandible positions were propagated to TMJ articular surface positions using both models, although the results were model-related. The model-based uncertainty was quantified using error metrics. The consistency error revealed variability that dominated in the translation component over the rotation component of the rigid-body transformation, and showed anisotropy in the latero-lateral direction. The simulation errors were not uniform across mandible positions and were higher (p<0.0001) at the TMJ level (1.46 mm) than at the dental level (0.47 mm). As even small discrepancies in mandible position can lead to significant changes in the TMJ joint space, the proposed methodology may be useful for evaluating geometrically related positions of the mandible and TMJ, particularly when repeated radiographic imaging of the TMJs is undesirable.02319nas a2200133   4500000000100000008004100001100001800042700002100060700002200081700002600103245010300129856003600232520191700268       2026                            d1 aDariusz Pojda1 aKrzysztof Domino1 aMichał Tarnawski1 aAgnieszka Anna Tomaka00aTransformation-driven generation of comparable projection images from multimodal anatomical scenes  uhttp://arxiv.org/abs/2606.165733 aThis work addresses the computational problem of generating reproducible projection-space observations from heterogeneous anatomical scenes whose components may undergo independent spatial transformations. We propose a transformation-driven framework for synthetic projection imaging from multimodal anatomical data and demonstrate it on mandibular-motion scenarios. In contrast to conventional Digitally Reconstructed Radiograph (DRR) approaches primarily designed for registration, projection realism, or rendering efficiency, the proposed formulation treats projection imaging as an observation process operating on an explicitly represented anatomical scene. Independently transformable volumetric and surface-based anatomical objects are embedded within a shared scene representation and propagated directly into projection space through explicit transformations. Projection geometry, acquisition modelling, material interpretation, and image presentation remain explicitly separated, enabling controlled exploration of methodological assumptions while preserving reproducibility and direct comparability between generated projections. Particular emphasis is placed on transformation-driven anatomical scenarios relevant to craniofacial analysis, including mandibular motion and therapeutic repositioning. Using a shared anatomical reference scene composed of CT/CBCT volumes, segmented structures, surface models, and auxiliary anatomical or therapeutic objects, the framework enables generation of directly comparable VirtualRTG projections from multiple anatomical configurations while preserving identical imaging assumptions. Rather than aiming at fully physically faithful radiographic simulation, the proposed approach provides a controllable and reproducible methodological environment for studying anatomy--projection relationships, motion observability, and transformation-aware imaging workflows.01927nas a2200169   4500000000100000008004100001260001200042100002600054700002100080700002200101700001800123245009600141856004700237490000900284520145000293022001401743       2025                            d  c10/20251 aAgnieszka Anna Tomaka1 aLeszek Luchowski1 aMichał Tarnawski1 aDariusz Pojda00aComputer-Aided Design of Personalized Occlusal Positioning Splints Using Multimodal 3D Data  uhttps://doi.org/10.1016/j.cviu.2025.1045270 v262C3 aDigital technology plays a crucial role in designing customized medical devices, such as occlusal splints, commonly used in the management of disorders of the stomatognathic system. This methodological proof-of-concept study presents a computer-aided approach for designing and evaluating occlusal positioning splints. The primary aim is to demonstrate the feasibility and geometric accuracy of the proposed method at the preclinical stage. In this approach, a three-dimensional splint is generated using a transformation matrix to represent the therapeutic mandibular position. An experienced operator defines this position using a virtual patient model reconstructed from intraoral scans, CBCT, 3D facial scans, and a digitized plaster model. We introduce a novel method for generating splints that reproduces occlusal conditions in the therapeutic position and resolves surface conflicts through virtual embossing. The process for obtaining transformation matrices using dental tools and intraoral devices commonly employed in dental and laboratory workflows is described, and the geometric accuracy of both designed and printed splints is evaluated using profile and surface deviation analysis. The method supports reproducible, patient-specific splint fabrication and provides a transparent foundation for future validation studies, supporting multimodal image registration and quantification of occlusal discrepancies in research settings.  a1077-314200390nas a2200145   4500000000100000008004100001260001200042100001800054700002000072700002600092700002100118245004800139856005000187490000700237       2025                            d  c02/20251 aDariusz Pojda1 aMateusz Żarski1 aAgnieszka Anna Tomaka1 aLeszek Luchowski00adpVision: environment for multimodal images  uhttp://dx.doi.org/10.1016/j.softx.2025.1020930 v3001641nas a2200169   4500000000100000008004100001260007700042100001900119700001700138700001800155700002000173700001800193700002000211245007100231856005600302520111300358       2025                            d  c09.2025bWrocław University of Science and TechnologyaWrocław, Poland1 aWojciech Macek1 aMariusz Deja1 aDariusz Pojda1 aMateusz Korpyś1 aCho-Pei Jiang1 aGrzegorz Lesiuk00aQuantitative Techniques for Assessing Fatigue Damage After Failure  uhttps://iras2025.pwr.edu.pl/publication/macek-2025/3 aA significant quantity of the fatigue life studies and a considerable number of fracture investigations have been carried out to measure changes associated with the damage process. However, there are cur-rently no set rules for the fractographical assessment of fatigue damage, and efforts are being made to find suitable techniques or alter current ones. Consequently, this study looks at two efficient post-failure techniques for identifying and quantifying damage. Fracture surface topography analysis, or FRASTA, has been used to solve a variety of failure problems. This quantified fractographic approach was first used in the early 1980s and has since been improved upon in tandem with developments in computing and measurement methods. To understand the behavior of a material under stress, especially in fatigue scenarios, the second methodology is known as the "entire fracture surface method" in mate-rial science. This method involves analyzing the entire surface of a fracture, or the broken surface pa-rameters. This approach aids in forecasting fatigue life and comprehending fatigue phenomena.00450nas a2200157   4500000000100000008004100001260001200042100002600054700001800080700002200098700002100120245007600141856005300217490000800270022001400278       2025                            d  c05/20251 aAgnieszka Anna Tomaka1 aDariusz Pojda1 aMichał Tarnawski1 aLeszek Luchowski00aTransformation trees – documentation of multimodal image registration  uhttps://doi.org/10.1016/j.compbiomed.2025.1103110 v193  a0010-482500345nas a2200121   4500000000100000008004100001260001200042100002100054700001800075245007700093856004600170490000700216       2025                            d  c06/20251 aLeszek Luchowski1 aDariusz Pojda00aVisualization of a multidimensional point cloud as a 3D swarm of avatars  uhttps://www.mdpi.com/2076-3417/15/13/72090 v1501748nas a2200169   4500000000100000008004100001260001200042100001800054700002600072700002100098700002200119245011400141856004600255490000700301520125600308022001401564       2021                            d  c12/20211 aDariusz Pojda1 aAgnieszka Anna Tomaka1 aLeszek Luchowski1 aMichał Tarnawski00aIntegration and application of multimodal measurement techniques: relevance of photogrammetry to orthodontics  uhttps://www.mdpi.com/1424-8220/21/23/80260 v213 aMultimodal imaging, including 3D modalities, is increasingly being applied in orthodontics, both as a diagnostic tool and especially for the design of intraoral appliances, where geometric accuracy is very important. Laser scanners and other precision 3D imaging devices are expensive and cumbersome, which limits their use in medical practice. Photogrammetry, using ordinary 2D photographs or video recordings to create 3D imagery, offers a cheaper and more convenient alternative, replacing the specialised equipment with handy consumer cameras. The present paper addresses the question to what extent, and under what conditions, this technique can be an adequate replacement for the 3D scanner. The accuracy of simple surface reconstruction and of model embedding achieved with photogrammetry was verified against that obtained with a triangulating laser scanner. To roughly evaluate the impact of image imperfections on photogrammetric reconstruction, the photographs for photogrammetry were taken under various lighting conditions and used either raw or with a blur simulating defocus. Video footage was also tested as another 2D imaging modality feeding data into photogrammetry. Results show significant potential of photogrammetric techniques.  a1424-822000465nas a2200169   4500000000100000008004100001260001200042100002100054700002600075700001800101700002100119700002500140245006400165856004500229490000700274022001400281       2021                            d  c02/20211 aLeszek Luchowski1 aAgnieszka Anna Tomaka1 aDariusz Pojda1 aKrzysztof Skabek1 aPrzemysław Kowalski00aMultimodal imagery in forensic incident scene documentation  uhttps://www.mdpi.com/1424-8220/21/4/14070 v21  a1424-822000470nas a2200145   4500000000100000008004100001260001300042100002600055700002200081700002100103700002100124700001800145245013900163022002200302       2020                            d  bAOW EXIT1 aAgnieszka Anna Tomaka1 aMichał Tarnawski1 aLeszek Luchowski1 aBartosz Cerkaski1 aDariusz Pojda00aIntegracja obrazowania wielomodalnego w zastosowaniu do wspomagania diagnostyki stomatologicznej, planowania i oceny wyników leczenia  a978-83-7837-097-000423nas a2200157   4500000000100000008004100001260001300042100002100055700002600076700001800102700002200120700002100142700002500163245005500188022002200243       2020                            d  bAOW EXIT1 aLeszek Luchowski1 aAgnieszka Anna Tomaka1 aDariusz Pojda1 aMichał Tarnawski1 aKrzysztof Skabek1 aPrzemysław Kowalski00aSkanery3D - trójwymiarowe obrazowanie powierzchni  a978-83-7837-097-000431nas a2200145   4500000000100000008004100001260005300042100001800095700002600113700002100139700002100160700002200181245006800203490001400271       2019                            d  c05/2019bSpringer International PublishingaCham1 aDariusz Pojda1 aAgnieszka Anna Tomaka1 aLeszek Luchowski1 aKrzysztof Skabek1 aMichał Tarnawski00aApplying computational geometry to designing an occlusal splint0 vvol 1098600446nas a2200145   4500000000100000008004100001260001200042100002600054700002100080700001800101700002100119700002200140245006800162856007000230       2019                            d  c10/20191 aAgnieszka Anna Tomaka1 aLeszek Luchowski1 aDariusz Pojda1 aKrzysztof Skabek1 aMichał Tarnawski00aApplying computational geometry to designing an occlusal splint  uhttps://www.tandfonline.com/doi/abs/10.1080/21681163.2019.167009600988nas a2200157   4500000000100000008004100001260004400042100002600086700002100112700001800133700002200151245006500173490001300238520055700251020002200808       2019                            d  bSpringer International PublishingaCham1 aAgnieszka Anna Tomaka1 aLeszek Luchowski1 aDariusz Pojda1 aMichał Tarnawski00aDynamic Occlusion Surface Estimation from 4D Multimodal Data0 vvol 10113 aMethods are described of determining the dynamic occlusion surface based on dynamic sequences of mandibular motion, acquired with a dynamic scanner, and measurements acquired with the Zebris axiograph. The Zebris data is brought into register with multimodal imagery, using three corresponding transformations. This registration allows dense motion sequences to be simulated, which in turn allows occlusal conditions to be known at various stages of movement and the dynamic occlusal surface to be identified for the purposes of occlusal splint design.  a978-3-030-23761-501975nas a2200169   4500000000100000008004100001260005400042100002600096700002100122700001800143700002200161700002100183245007000204856003600274520146800310022002701778       2019                            d  bUTP University of Science & TechnologyaBydgoszcz1 aAgnieszka Anna Tomaka1 aLeszek Luchowski1 aDariusz Pojda1 aMichał Tarnawski1 aKrzysztof Domino00aThe dynamics of the stomatognathic system from 4D multimodal data  uhttp://arxiv.org/abs/1911.088543 aThe purpose of this chapter is to discuss methods of acquisition, visualization and analysis of the dynamics of a complex biomedical system, illustrated by the human stomatognathic system. The stomatognathic system consists of the teeth and the skull bones with the maxilla and the mandible. Its dynamics can be described by the change of mutual position of the lower/mandibular part versus the upper/maxillary one due to the physiological motion of opening, chewing and swallowing. In order to analyse the dynamics of the stomatognathic system its morphology and motion has to be digitized, which is done using static and dynamic multimodal imagery like CBCT and 3D scans data and temporal measurements of motion. The integration of multimodal data incorporates different direct and indirect methods of registration - aligning of all the data in the same coordinate system. The integrated sets of data form 4D multimodal data which can be further visualized, modeled, and subjected to multivariate time series analysis. Example results are shown. Although there is no direct method of imaging the TMJ motion, the integration of multimodal data forms an adequate tool. As medical imaging becomes ever more diverse and ever more accessible, organizing the imagery and measurements into unified, comprehensive records can deliver to the doctor the most information in the most accessible form, creating a new quality in data simulation, analysis and interpretation.  aISBN 978-83-65603-96-800808nas a2200145   4500000000100000008004100001260004400042100002600086700001800112700002100130700002200151245004000173520042700213020002200640       2018                            d  bSpringer International PublishingaCham1 aAgnieszka Anna Tomaka1 aDariusz Pojda1 aLeszek Luchowski1 aMichał Tarnawski00aMethods of Tooth Equator Estimation3 aFull automation of the designing process of an occlusal splint requires an algorithm to determine the boundary of the splint. For this purpose, the idea of tooth equator is frequently used. The task is to find the approximate level where the teeth are widest, and then cut off the shape of the splint there. The article presents methods for automatic estimation of the tooth equator, used to determine the splint boundary.  a978-3-030-00840-600567nas a2200193   4500000000100000008004100001260004400042100002600086700002200112700001800134700001600152700001700168700001500185700002300200245006300223856005100286300001400337020002200351       2016                            d  bSpringer International PublishingaCham1 aAgnieszka Anna Tomaka1 aMichał Tarnawski1 aDariusz Pojda1 aEwa Piętka1 aPawel Badura1 aJacek Kawa1 aWojciech Wieclawek00aMultimodal Image Registration for Mandible Motion Tracking  uhttp://dx.doi.org/10.1007/978-3-319-39796-2_15  a179–191  a978-3-319-39796-200983nas a2200133   4500000000100000008004100001260005000042100002100092700001800113700002300131245006700154300001400221520061400235       2016                            d  bSpringer International Publishing Switzerland1 aKrzysztof Skabek1 aDariusz Pojda1 aRyszard Winiarczyk00aProgressive reduction of meshes with arbitrary selected points  a525–5333 aThe usage of progressive meshes for representation and transmission of triangular meshes of faces at certain level of details was described in the paper. We focused on progressive representation based on Garland and Hoppe approach. The comparison of simple methods using quadric mesh simplification to the view-dependent implementation of progressive methods was performed. The mesh simplification is further improved by introducing the characteristic points fixing the distinguishable points on human face. The test and discussion of the implemented method were given using face scans from 3dMD face scanner.01762nas a2200121   4500000000100000008004100001260007300042100001800115700002500133245015100158300001200309520131900321       2014                            d  c3bInternational Centre of Biocybernetics Polish Academy of Sciences1 aDariusz Pojda1 aPrzemysław Kowalski00aAssumptions for a software tool to support the diagnosis of the stomatognathic system: data gathering, visualizing compund models and their motion  a51–563 aThe amount of measurement data collected in medical diagnostics makes their storage and handling an important issue. Also, the requirements for the visualization of such data, and for merging information from different sources of measurement, are growing. In the case of diagnosis of stomatognathic system we have to deal with various methods of medical imaging, such as CT, 3D scans, impressions of teeth, facial scans, and various types of reconstructions resulting from processing of measurement data. In the research project dedicated to the diagnosis of bruxism, we encounter records of measurements of Holter monitoring. We present a web application designed to collect the measurement data acquired in the project. In the first version, this tool has been prepared to store EKG files. We are planning further extension of the capabilities of the database to collect 3D scans, volumetric data and surfaces which are reconstructed from computed tomography. We also present assumptions for the user interface to the desktop application to assist the diagnosis. The application will allow to carry out morphometric measurements, the integration of multimodal imaging data, visualization of mandible movement in TMJ, occlusion detection and motion simulation of the mandible, and also the design of dental guard.00833nas a2200157   4500000000100000008004100001260013300042100002500175700001800200700002100218700002400239700002500263245005200288300001400340520032100354       2014                            d  bSilesian University of Technology, Gliwice, Institute of Theoretical and Applied Informatics, Polish Academy of Science, Gliwice1 aPrzemysław Kowalski1 aDariusz Pojda1 aAleksandra Gruca1 aTadeusz Czachórski1 aStanisław Kozielski00aVisualization of heterogenic images of 3D scene  a291–2973 aThe article presents a problem of 3D and 2D heterogenic data visualization. The data come from different devices installed on the robot platform. The data include 3D point cloud, 2D images, 3D and 2D occupancy grids, obtained from laser scanning device, stereocameras and calculated using data from laser 3D scanner.01067nas a2200133   4500000000100000008004100001100002100042700001800063245006900081300001400150490000700164520074800171022001400919       2011                            d1 aKrzysztof Skabek1 aDariusz Pojda00aOptimization of Mesh Representation for Progressive Transmission  a263–2750 v233 aAbstract: The paper presents the implementation of methods for progressive mesh encoding. The described implementation is a modification of the software published in 2008 by Zhao He, which is based on studies by Michael Garland and Hugues Hoppe. We focused on improving the performance of the software. In particular we modified the data structures to ensure their better indexing, which significantly improved the computational complexity of the algorithm. We also implemented the support for simplified meshes with textures. The authors present the comparison of the performance of these methods in relation to the original He Zhao’s algorithm. The performance of progressive mesh encoding in our implementation was significantly improved.  a1896-533400324nas a2200109   4500000000100000008004100001100001800042245011900060300001400179490000700193022001400200       2010                            d1 aDariusz Pojda00aCalculating the position of the observer in 3D using 2D images for the interactive presentation of virtual objects  a177–1860 v22  a1896-533400313nas a2200109   4500000000100000008004100001100001800042245011100060300001100171490000700182022001400189       2008                            d1 aDariusz Pojda00aSystem of computer aiding diagnostic of Squint with applying analysis of the signal of the move of the eye  a3–140 v20  a1896-533400267nas a2200109   4500000000100000008004100001260000600042100001800048700001600066245006100082300001400143       2006                            d  c91 aDariusz Pojda1 aJózef Ober00aModel of the oculomotoric system for diagnosis of Squint  a193–19800223nas a2200085   4500000000100000008004100001100001800042700001600060245006100076       2004                            d1 aDariusz Pojda1 aJózef Ober00aModel of the oculomotoric system for diagnosis of Squint00250nas a2200085   4500000000100000008004100001100001800042700001600060245008800076       2003                            d1 aDariusz Pojda1 aJózef Ober00aMultilayer model of the oculomothoric system for computer based diagnosis of squint00389nas a2200157   4500000000100000008004100001100001600042700002500058700002100083700001800104700002100122245005600143300001100199490000700210022001400217       2002                            d1 aA. Augustyn1 aPrzemysław Kowalski1 aLeszek Luchowski1 aDariusz Pojda1 aKrzysztof Skabek00aSystem for toolmark analysis in forensic laboratory  a3–160 v14  a0867-212100334nas a2200121   4500000000100000008004100001100001600042700002500058700002100083700001800104700002100122245006900143       2000                            d1 aA. Augustyn1 aPrzemysław Kowalski1 aLeszek Luchowski1 aDariusz Pojda1 aKrzysztof Skabek00aComputer-assisted analysis of striated toolmarks and impressions00184nas a2200073   4500000000100000008004100001100001800042245005000060       2000                            d1 aDariusz Pojda00aZastosowanie systemu OBER2 w diagnostyce zeza00394nas a2200157   4500000000100000008004100001260001500042100002100057700002500078700002600103700001900129700001800148700002100166245003500187300001400222       1999                            d  cXaKraków1 aLeszek Luchowski1 aPrzemysław Kowalski1 aAgnieszka Anna Tomaka1 aMaciej Philipp1 aDariusz Pojda1 aKrzysztof Skabek00aMobile Stereovision Strategies  a531–53600304nas a2200121   4500000000100000008004100001100001800042700002500060245005900085300001200144490000700156022001900163       1999                            d1 aDariusz Pojda1 aPrzemysław Kowalski00aProgramowe platformy dla zagadnień wizji komputerowej  a57–810 v37  aISSN 0208-728600730nas a2200097   4500000000100000008004100001100001800042245007700060300001200137520048300149       1999                            d1 aDariusz Pojda00aSegmentacja i pasowanie obrazów 2D dla potrzeb aktywnego stereowidzenia  a81–843 aW referacie przedstawiono metodę segmentacji i pasowania par obrazów stereo. Metoda ta została opracowana w wyniku prac prowadzonych w ramach projektu badawczego dotyczącego automatycznego rozpoznawania struktury trójwymiarowej sceny. Scena zbudowana jest z brył wielościennych i obserwowznz za pomocą ruchomej głowicy stereowizyjnej. Głównym celem projektu było rozpoznawanie obserwowanych brył geometrycznych oraz określanie ich wzajemnego położenia na scenie.00719nas a2200133   4500000000100000008004100001100001800042700002500060245006700085300001400152490000700166520039300173022001900566       1998                            d1 aDariusz Pojda1 aPrzemysław Kowalski00aKryteria pasowania punktów charaktery-stycznych w stereowizji  a209–2230 v353 aIstotnym problemem, występującym w zagadnieniu stereowidzenia, z wykorzystaniem obrazu z dwu kamer, jest pasowanie punktów charakterystycznych. W artykule przedstawiamy zestaw pięciu testów, służących do pasowania punktów. Jest to test jasnościowy, dokonujący właściwego pasowania, oraz cztery testy geometryczne, dokonujące weryfikacji poprawności spasowania par punktów.  aISSN 0208-7286