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We propose LiFCal, a novel geometric online calibration pipeline for MLA-based light field cameras. LiFCal accurately determines model parameters from a moving camera sequence without precise calibration targets, integrating arbitrary…

Image and Video Processing · Electrical Eng. & Systems 2024-08-22 Aymeric Fleith , Doaa Ahmed , Daniel Cremers , Niclas Zeller

This paper presents a groundbreaking approach - the first online automatic geometric calibration method for radar and camera systems. Given the significant data sparsity and measurement uncertainty in radar height data, achieving automatic…

Computer Vision and Pattern Recognition · Computer Science 2025-05-29 Van-Tin Luu , Yon-Lin Cai , Vu-Hoang Tran , Wei-Chen Chiu , Yi-Ting Chen , Ching-Chun Huang

Histological staining is a vital step used to diagnose various diseases and has been used for more than a century to provide contrast to tissue sections, rendering the tissue constituents visible for microscopic analysis by medical experts.…

Image and Video Processing · Electrical Eng. & Systems 2020-05-08 Yijie Zhang , Kevin de Haan , Yair Rivenson , Jingxi Li , Apostolos Delis , Aydogan Ozcan

This study is concerned with the design of a Mueller imaging polarimeter for the visualization of spatially-varying Mueller matrix fields. A simplified calibration procedure is advocated, where all the optical elements are calibrated…

Instrumentation and Detectors · Physics 2018-11-08 Yvain Quéau , Florian Leporcq , Ayman Alfalou

In four-dimensional scanning transmission electron microscopy (4D STEM) a focused beam is scanned over a specimen and a diffraction pattern is recorded at each position using a pixelated detector. During the experiment, it must be ensured…

Most sensor setups for onboard autonomous perception are composed of LiDARs and vision systems, as they provide complementary information that improves the reliability of the different algorithms necessary to obtain a robust scene…

Robotics · Computer Science 2022-03-16 Jorge Beltrán , Carlos Guindel , Arturo de la Escalera , Fernando García

Particle size measurement based on digital holography with conventional algorithms are usually time-consuming and susceptible to noises associated with hologram quality and particle complexity, limiting its usage in a broad range of…

Applied Physics · Physics 2020-01-01 Siyao Shao , Kevin Mallery , Jiarong Hong

This paper presents an integrated approach to Visual SLAM, merging online sequential photometric calibration within a Hybrid direct-indirect visual SLAM (H-SLAM). Photometric calibration helps normalize pixel intensity values under…

Robotics · Computer Science 2024-09-26 Nicolas Abboud , Malak Sayour , Imad H. Elhajj , John Zelek , Daniel Asmar

Performance of digitally beamformed phased arrays relies on accurate calibration of the array by obtaining gains of each antenna in the array. The stations of the Square Kilometer Array-Low (SKA-Low) are such digital arrays, where the…

Instrumentation and Methods for Astrophysics · Physics 2024-01-17 Jishnu N. Thekkeppattu , Randall B. Wayth , Marcin Sokolowski

The aim of this study is to use a Multilayer Perceptron (MLP) Artificial Neural Network (ANN) for phaseless imaging the human heel (modeled as a bilayer dielectric media: bone and surrounding tissue) and the calcaneus cross-section size and…

The ability to form images through hair-thin optical fibres promises to open up new applications from biomedical imaging to industrial inspection. Unfortunately, deployment has been limited because small changes in mechanical deformation…

Automatic surgical phase recognition is a challenging and crucial task with the potential to improve patient safety and become an integral part of intra-operative decision-support systems. In this paper, we propose, for the first time in…

Image and Video Processing · Electrical Eng. & Systems 2022-03-23 Tobias Czempiel , Magdalini Paschali , Matthias Keicher , Walter Simson , Hubertus Feussner , Seong Tae Kim , Nassir Navab

The appearance of microcalcifications in mammograms is one of the early signs of breast cancer. So, early detection of microcalcification clusters (MCCs) in mammograms can be helpful for cancer diagnosis and better treatment of breast…

Computer Vision and Pattern Recognition · Computer Science 2012-01-31 Hajar Moradmand , Saeed Setayeshi , Hossein Khazaei Targhi

Micro- and mesostructures of multiphase materials obtained from tomography and image acquisition are an ever more important database for simulation analyses. Huge data sets for reconstructed 3d volumes typically as voxel grids call for…

Computational Engineering, Finance, and Science · Computer Science 2021-03-17 Ajinkya Gote , Andreas Fischer , Chuanzeng Zhang , Bernhard Eidel

The vertebral levels of the spine provide a useful coordinate system when making measurements of plaque, muscle, fat, and bone mineral density. Correctly classifying vertebral levels with high accuracy is challenging due to the similar…

Image and Video Processing · Electrical Eng. & Systems 2020-10-08 Daniel C. Elton , Veit Sandfort , Perry J. Pickhardt , Ronald M. Summers

Low-cost gyroscope calibration is essential for ensuring the accuracy and reliability of gyroscope measurements. Stationary calibration estimates the deterministic parts of measurement errors. To this end, a common practice is to average…

Machine Learning · Computer Science 2025-11-18 Yair Stolero , Itzik Klein

Conformance checking techniques aim to collate observed process behavior with normative/modeled process models. The majority of existing approaches focuses on completed process executions, i.e., offline conformance checking. Recently, novel…

Logic in Computer Science · Computer Science 2022-11-23 Daniel Schuster , Gero J. Kolhof

Multiple LiDARs have progressively emerged on autonomous vehicles for rendering a wide field of view and dense measurements. However, the lack of precise calibration negatively affects their potential applications in localization and…

Robotics · Computer Science 2019-05-14 Jianhao Jiao , Yang Yu , Qinghai Liao , Haoyang Ye , Ming Liu

Lots of popular calibration methods in medical images focus on classification, but there are few comparable studies on semantic segmentation. In polyp segmentation of medical images, we find most diseased area occupies only a small portion…

Computer Vision and Pattern Recognition · Computer Science 2024-05-10 Yudian Zhang , Chenhao Xu , Kaiye Xu , Haijiang Zhu

Image Phase Alignment Super-sampling (ImPASS) is a computational method for combining displaced low-resolution images into a single high-resolution image. The general steps include measuring the relative displacements, up-sampling, aligning…

Optics · Physics 2026-01-09 James N. Caron
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