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Quantification of projective distortion for fiducial markers
2013 21st Signal Processing and Communications Applications Conference (SIU), 2013The aim of this study is to quantify the projective distortion of candidate quadrilaterals found in a square-framed fiducial marker detection algorithm. Based on the quantified value, candidates can be eliminated in such a way that only the quadrilaterals that may be a projective transformation of a square remain.
Burak Benligiray +3 more
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Embedding prolene for the development of fiducial markers
The Anatomical Record, 1989AbstractA simple, inexpensive method is described for embedding Prolene with tissue samples to provide landmarks for fiducial points to align serial sections in tissue reconstructions. Prolene is a monofilament suture material that can be easily sectioned with diamond knives to provide circular markers in each section.
C L, Johnson +2 more
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Technique for Implantation of Fiducial Markers in the Prostate
Urology, 2007To describe our experience in developing a technique for implanting fiducial markers (gold markers and electromagnetic transponders) in the prostate by the transrectal approach under ultrasound guidance.Our technique requires an endocavitary probe (ultrasound transducer) designed for prostate imaging, an ultrasound system with software to visualize the
Katsuto, Shinohara, Mack, Roach
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The Geometry of Colorful, Lenticular Fiducial Markers
2015 International Conference on 3D Vision, 2015Understanding the pose of an object is fundamental to a variety of visual tasks, from trajectory estimation of UAVs to object tracking for augmented reality. Fiducial markers are visual targets designed to simplify this process by being easy to detect, recognize, and track. They are often based on features that are partially invariant to lighting, pose
Ian Schillebeeckx +3 more
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Reattachable fiducial skin marker for automatic multimodality registration
International Journal of Computer Assisted Radiology and Surgery, 2022 In this repository, we provide all image volume files of the CT and MRI measurements that were part of our paper "Reattachable fiducial skin marker for automatic multimodality registration" published in the International Journal for Computer Assisted ...
Benjamin J Mittmann +2 more
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High-accuracy fiducial markers for ground truth
2016 International Conference on Image and Vision Computing New Zealand (IVCNZ), 2016This paper introduces a fiducial marker which favours accuracy over run-time performance. Its intended use is for creating ground truth for outdoor SLAM in GPS-denied environments. Rather than using only corners or edges for pose estimation, the marker has a radial sinusoid pattern which has a predictable appearance under perspective projection.
Matthew J. Edwards +2 more
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Designing Highly Reliable Fiducial Markers
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2010Fiducial markers are artificial landmarks added to a scene to facilitate locating point correspondences between images, or between images and a known model. Reliable fiducials solve the interest point detection and matching problems when adding markers is convenient. The proper design of fiducials and the associated computer vision algorithms to detect
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Edible fiducial marker made of edible retroreflector
Computers & Graphics, 2018Abstract In Augmented Reality (AR) and Mixed Reality (MR), it is important to measure the position and orientation of objects in the real world. However, there were many difficulties in recognizing objects from images along, especially considering real-time processing.
Hiromasa Oku +3 more
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Robust identification of fiducial markers in challenging conditions
Expert Systems with Applications, 2018This work tackles the marker identification process as a classification problem.Methodology proposed to train the classifiers with a synthetic dataset of markers.Our proposal can identify markers under very difficult image conditions.The proposed method performs significantly better than previous approaches.
Víctor Manuel Mondéjar-Guerra +4 more
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Speeded up detection of squared fiducial markers
Image and Vision Computing, 2018Squared planar markers have become a popular method for pose estimation in applications such as autonomous robots, unmanned vehicles and virtual trainers. The markers allow estimating the position of a monocular camera with minimal cost, high robustness, and speed.
Francisco José Romero-Ramírez +2 more
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