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Camera auto-calibration for complex scenes
Thirteenth International Conference on Machine Vision, 2021In this paper, we propose a novel method for automatic camera calibration based on pedestrians' observations. Our proposed method is capable of estimating calibration parameters for complex scenes having more than one ground plane. Unlike existing methods that require time-consuming optimization step, our method uses real-time re-estimation step based ...
Anas Ali, Pavel Smrz
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Constraints for Heterogeneous Sensor Auto-Calibration
2004 Conference on Computer Vision and Pattern Recognition Workshop, 2005This paper describes a framework for calibrating motion sensitive sensors attached to an autonomous vehicle. Based on camera auto-calibration techniques, we derive constraints relating sensor measurements to the relative position and orientation of different sensors.
Qilong Zhang, Robert Pless
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Auto calibration of a cone‐beam‐CT
Medical Physics, 2012Purpose:This paper introduces a novel autocalibration method for cone‐beam‐CTs (CBCT) or flat‐panel CTs, assuming a perfect rotation. The method is based on ellipse‐fitting. Autocalibration refers to accurate recovery of the geometric alignment of a CBCT device from projection images alone, without any manual measurements.Methods:The authors use test ...
Daniel, Gross +4 more
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Auto‐calibrated parallel spiral imaging
Magnetic Resonance in Medicine, 2006AbstractThis work describes an auto‐calibrated method for parallel imaging with spiral trajectory. The method is a k‐space approach where an interpolation kernel, accounting for coil sensitivity factors, is derived from experimental data and used to interpolate the reduced data set in parallel imaging to estimate the missing k‐space data.
Keith, Heberlein, Xiaoping, Hu
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A method for the auto-calibration of PID controllers
Automatica, 1995zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Alina Voda, I. D. Landau
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Camera auto-calibration with virtual patterns
EFTA 2003. 2003 IEEE Conference on Emerging Technologies and Factory Automation. Proceedings (Cat. No.03TH8696), 2004This paper studies the multi-image calibration of a camera and how to carry it out in an automatic way making use of a projector. To prepare for multi-image calibration, it is necessary to calibrate the camera. Next, calibrate the projector using that camera. Then calibrate any camera with similar focal length to the previous one.
Alfredo Gardel Vicente +2 more
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Robust Auto-Calibration from Pedestrians
2006 IEEE International Conference on Video and Signal Based Surveillance, 2006The knowledge of camera intrinsic and extrinsic parameters is useful, as it allows us to make world measurements. Unfortunately, calibration information is rarely available in video surveillance systems and it is difficult to obtain once the system is installed.
Junejo, Imran, Foroosh, Hassan
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A New Thermocouple Auto-Calibration System
2008 International Conference on Computer Science and Software Engineering, 2008According to method of the used thermocouple calibration device and the technology of virtual instrument, an auto-calibration system based on Labview is developed. It proposed the concrete design project about hardware and software, especially introduced how to realize the data processing and analysis. The practice showed that the system run well.
Jie Chen 0014, Xuejun Hu, Lixin Xu
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Auto-calibration by direct observation of objects
Image and Vision Computing, 1993Abstract This paper presents techniques for using objects in a scene to define the reference frames for 3D reconstruction. We first present a simple technique to calibrate an orthographic projection from four non-coplanar reference points. We then show how the observation of two additional known scene points can provide the complete perspective ...
James L. Crowley +2 more
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Auto-calibration from the orthogonality constraints
Proceedings 15th International Conference on Pattern Recognition. ICPR-2000, 2002This paper describes an iterative algorithm for making Euclidean reconstruction of a scene from an image sequence captured by a camera with zero skew. The output consists of both the Euclidean reconstruction and the intrinsic parameters of the camera at the different imaging instants, i.e. it also provides a camera calibration. The problem is solved in
Yongduek Seo, Anders Heyden
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