Wide-angle cameras are widely used in photogrammetry and autonomous systems which rely on the accurate metric measurements derived from images. To find the geometric relationship between incoming rays and image pixels, geometric camera calibration (GCC) has been actively developed. Aiming to provide practical calibration guidelines, this work surveys the existing GCC tools and evaluates the representative ones for wide-angle cameras. The survey covers the camera models, calibration targets, and algorithms used in these tools, highlighting their properties and the trends in GCC development. The evaluation compares six target-based GCC tools, namely BabelCalib, Basalt, Camodocal, Kalibr, the MATLAB calibrator, and the OpenCV-based ROS calibrator, with simulated and real data for wide-angle cameras described by four parametric projection models. These tests reveal the strengths and weaknesses of these camera models, as well as the repeatability of these GCC tools. In view of the survey and evaluation, future research directions of wide-angle GCC are also discussed.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11510980 | PMC |
| http://dx.doi.org/10.3390/s24206595 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The Europa Imaging System (EIS) Investigation.
Space Sci Rev
December 2024
NASA Goddard Space Flight Center, Greenbelt, MD USA.
The Europa Imaging System (EIS) consists of a Narrow-Angle Camera (NAC) and a Wide-Angle Camera (WAC) that are designed to work together to address high-priority science objectives regarding Europa's geology, composition, and the nature of its ice shell. EIS accommodates variable geometry and illumination during rapid, low-altitude flybys with both framing and pushbroom imaging capability using rapid-readout, 8-megapixel (4k × 2k) detectors. Color observations are acquired using pushbroom imaging with up to six broadband filters.
View Article and Find Full Text PDFMillimeter-precision positioning for wide-angle indoor area enabled by metalens-integrated camera.
Nanophotonics
September 2024
National Mobile Communications Research Laboratory, School of Information Science and Engineering, Frontiers Science Center for Mobile Information Communication and Security, Southeast University, Nanjing 210096, China.
Due to signal shielding caused by building structures, conventional mature positioning technologies such as the Global Positioning System (GPS) are only suitable for outdoor navigation and detection. However, there are many scenarios that urgently require high-precision indoor positioning technologies, such as indoor wireless optical communications (OWCs), navigation in large buildings, and warehouse management. Here, we proposed a millimeter-precision indoor positioning technology based on metalens-integrated camera, which determines the position of the device through imaging of beacon LEDs.
View Article and Find Full Text PDFAberration-corrected hybrid metalens for longwave infrared thermal imaging.
Nanophotonics
July 2024
School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.
Article Synopsis
- Wide-angle metalenses in the longwave infrared can outperform traditional lenses because they are lighter, more affordable, and compatible with CMOS technology.
- This study introduces two metasurfaces to correct common optical issues like distortion and spherical aberration, resulting in a hybrid metalens designed for thermal imaging in the 8-12 μm waveband.
- The new metalens shows impressive performance metrics, such as an FOV of 24°, an F-number of 1.2, and has potential applications in areas like camera technology, autonomous vehicles, healthcare, and environmental monitoring.
Geometric Wide-Angle Camera Calibration: A Review and Comparative Study.
Sensors (Basel)
October 2024
The Department of Civil, Environmental, and Geodetic Engineering, The Ohio State University, Columbus, OH 43210, USA.
Wide-angle cameras are widely used in photogrammetry and autonomous systems which rely on the accurate metric measurements derived from images. To find the geometric relationship between incoming rays and image pixels, geometric camera calibration (GCC) has been actively developed. Aiming to provide practical calibration guidelines, this work surveys the existing GCC tools and evaluates the representative ones for wide-angle cameras.
View Article and Find Full Text PDFNovel Retractor-Camera System Facilitates Less Traumatic Minimally Invasive Procedures and Declutters the Operation Field.
Innovations (Phila)
December 2024
Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Kent Ridge, Singapore.
Objective: To develop a novel endoscopic system that reduces trauma to the patient and declutters the surgical field for the surgeon in minimally invasive heart valve surgery.
Methods: We designed and developed a retractor-camera combination for minimally invasive heart surgery; the cable and camera were connected to the underbelly of the left atrial retractor blade to provide an illuminated, wide-angle view of the mitral valve. We conducted ex vivo, in vivo, and, ultimately, a first-in-man randomized, nonanonymized clinical trial on 20 patients who required minimally invasive mitral valve surgery.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!