Results 201 to 210 of about 36,319 (263)
Artificial intelligence versus traditional approaches in multicomponent spectral analysis. [PDF]
Sci RepFahmy NM, Obaydo RH, Lotfy HM.
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PREVENT Equations: Implications for Stroke Prevention. [PDF]
StrokeAhmed T +3 more
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Linking remote sensing with crop modeling for yield and nitrate leaching predictions in Minnesota. [PDF]
J Environ QualTahir M, Mulla DJ.
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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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Geometric video projector auto-calibration
2009 IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops, 2009In this paper we address the problem of geometric calibration of video projectors. Like in most previous methods we also use a camera that observes the projection on a planar surface. Contrary to those previous methods, we neither require the camera to be calibrated nor the presence of a calibration grid or other metric information about the scene.
Draréni, Jamil +2 more
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Extendible tracking by line auto-calibration
Proceedings IEEE and ACM International Symposium on Augmented Reality, 2002One of the key requirements for an augmented reality system is a tracking system that determines the user's viewpoint accurately. Many vision-based tracking systems exhibit limited tracking range due to their dependence on pre-calibrated features. Previous extendible-tracking systems only make use of point features.
NEUMANN ULRICH, JIANG BOLAN
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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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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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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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