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Detection of arbitrary triangle

Hong-Min Liu, Zhi-Heng Wang
2011 2011 4th International Congress on Image and Signal Processing  
This paper presents a method for the detection of arbitrary triangle based on the property that the distance of the incenter to the edges of the triangle is equidistant and equal to the radius of the inscribed  ...  Then the latter is made use to detect the candidate incenters of the triangles by local maximum detection.  ...  PRINCIPLE OF THE METHOD The inscribed circle of a triangle is used for the triangle detection.  ... 
doi:10.1109/cisp.2011.6100305 fatcat:n55hlyeuyrgb3gk6l7b7ivtfve

A cell model in the ventral visual pathway for the detection of circles of curvature constituting figures

Susumu Kawakami, Takehiro Ito, Yoshinari Makino, Makoto Hashimoto, Masafumi Yano
2020 Heliyon  
Each tangent in contact with this circle is detected by an NDS simple cell that performs the Hough transformation of LGN cell responses, and then this tangent is transformed to a three-dimensional (3D)  ...  We propose a series of cell models for detecting this circle, which is composed of a lateral geniculate nucleus (LGN) cell, nondirectionally selective (NDS) simple cell, and curvature-circle detection  ...  Acknowledgements We thank Yuki Sugie for his support with the programing about the simulator, and Kazuhiro Sakamoto for his suggestions regarding physiology.  ... 
doi:10.1016/j.heliyon.2020.e05397 pmid:33305029 pmcid:PMC7711303 fatcat:h2dx5jyv6vc67pggerg7mrwtni

CISP-BMEI 2020 TOC

2020 2020 13th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)  
Improved Hough Transform for Circle Detection using Circular Inscribed Direct TriangleLi Qiang, Wu Mingyun ............................................................................................  ...  Image Processing Image Coding and Transmission Appearance Monitoring of the Transmission Lines based on Hough Transform Chuang Han, Liu Qu ...........................................................  ... 
doi:10.1109/cisp-bmei51763.2020.9263536 fatcat:7ulpvhnt35d2lg5dwzu4kexley

Digital or analog Hough transform?

N. Kiryati, M. Lindenbaum, A.M. Bruckstein
1991 Pattern Recognition Letters  
The Hough Transform [2,4] is a well known technique for recognizing predefined features in edge maps. In this paper, the Hough Transform for detecting straight lines is considered.  ...  A variation of the Hough Transform that is aimed at detecting digital lines has been recently suggested. Other Hough algorithms are intended to detect straight lines in the analog pre-image.  ...  Leavers, King's College, London, for bringing reference [1] to their attention.  ... 
doi:10.1016/0167-8655(91)90412-f fatcat:ejyhpa4npnfwnimosx6qbol5j4

Digital or analog Hough Transform?

N. Kiryati, M. Lindenbaum, A. M. Brucksiein
1990 Procedings of the British Machine Vision Conference 1990  
The Hough Transform [2,4] is a well known technique for recognizing predefined features in edge maps. In this paper, the Hough Transform for detecting straight lines is considered.  ...  A variation of the Hough Transform that is aimed at detecting digital lines has been recently suggested. Other Hough algorithms are intended to detect straight lines in the analog pre-image.  ...  Leavers, King's College, London, for bringing reference [1] to their attention.  ... 
doi:10.5244/c.4.59 dblp:conf/bmvc/KiryatiLB90 fatcat:kkbenxx4obbtlb5x2klobce6j4

Regular polygon detection

N. Barnesi, G. Loy, D. Shaw, A. Robles-Kelly
2005 Tenth IEEE International Conference on Computer Vision (ICCV'05) Volume 1  
The use of edge orientation information also reduces noise compared to existing approaches such as the generalised Hough transform. Results are presented for images with noise to show stability.  ...  Given the edge structure of an image, we derive the a posteriori probability for a mixture of regular polygons, and thus the probability density function for the appearance of a mixture of regular polygons  ...  The Hough transform [8] and circular Hough transform [15] vote to an in-place representation of the shape to be detected.  ... 
doi:10.1109/iccv.2005.207 dblp:conf/iccv/BarnesLSR05 fatcat:iiht7zzrozelfl4updm6owcvfu

A Benchmark for Iris Location and a Deep Learning Detector Evaluation

Evair Severo, Rayson Laroca, Cides S. Bezerra, Luiz A. Zanlorensi, Daniel Weingaertner, Gladston Moreira, David Menotti
2018 2018 International Joint Conference on Neural Networks (IJCNN)  
The iris location is an important task for biometrics systems, affecting directly the results obtained in specific applications such as iris recognition, spoofing and contact lenses detection, among others  ...  In order to build a benchmark for iris location we annotate (iris squared bounding boxes) four databases from different biometric applications and make them publicly available to the community.  ...  Titan XP Pascal GPU used for this research.  ... 
doi:10.1109/ijcnn.2018.8489638 dblp:conf/ijcnn/SeveroLBZWMM18 fatcat:zjw6y7kecbhmxco4ngq4hzl6se

Analysis of image vs. position, scale and direction reveals pattern texture anisotropy

Roland Lehoucq, Jérôme Weiss, Bérengère Dubrulle, Axelle Amon, Antoine Le Bouil, Jérôme Crassous, David Amitrano, François Graner
2015 Frontiers in Physics  
Easy to understand and implement, it complements more sophisticated methods such as Hough transform or diffusion tensor imaging.  ...  Such protocol is intuitively interpreted and consistent with what the eye detects: relevant scales, local variations in space, privileged directions. It is fast and parallelizable.  ...  ACKNOWLEDGMENTS Antoine Le Bouil, Axelle Amon, and Jérôme Crassous thank Guillaume Raffy for discussions about Hough transform.  ... 
doi:10.3389/fphy.2014.00084 fatcat:j7kar2ep6napbprvowmzcpfy24

Real-time multi-camera video acquisition and processing platform for ADAS

Sergio Saponara, Nasser Kehtarnavaz, Matthias F. Carlsohn
2016 Real-Time Image and Video Processing 2016  
An FPGA-based hardware implementation, re-using IP macrocells for several ADAS algorithms, allows for real-time processing of input streams from VGA automotive CMOS cameras.  ...  Fish-eye lenses are used to achieve a large Field of View (FOV).  ...  Other works in literature propose the use of Hough Transform to detect circles within an image, but this method is able to detect only circular signs, and more specifically, it has been tested above all  ... 
doi:10.1117/12.2228235 dblp:conf/rivp/Saponara16 fatcat:q4rke23yxbcsrk5kivdpiqtawa

A Cross-Platform Comparison of Visual Marker Based Approaches for Autonomous Flight of Quadrocopters

Andreas Masselli, Shaowu Yang, Karl E. Wenzel, Andreas Zell
2013 Journal of Intelligent and Robotic Systems  
In this paper, we compare three different marker based approaches for six degrees of freedom (6DOF) pose estimation, which can be used for position and attitude control of micro aerial vehicles (MAV).  ...  We evaluate each method's accuracy by using an external tracking system and compare the methods with respect to their operating ranges and processing time.  ...  Andreas Schilling from the computer graphics group in our faculty for providing us the tracking system.  ... 
doi:10.1007/s10846-013-9925-4 fatcat:hmy75wstpncv5kybfpekznciey

A cross-platform comparison of visual marker based approaches for autonomous flight of quadrocopters

A. Masselli, S. Yang, K. E. Wenzel, A. Zell
2013 2013 International Conference on Unmanned Aircraft Systems (ICUAS)  
In this paper, we compare three different marker based approaches for six degrees of freedom (6DOF) pose estimation, which can be used for position and attitude control of micro aerial vehicles (MAV).  ...  We evaluate each method's accuracy by using an external tracking system and compare the methods with respect to their operating ranges and processing time.  ...  Andreas Schilling from the computer graphics group in our faculty for providing us the tracking system.  ... 
doi:10.1109/icuas.2013.6564749 fatcat:jmslpo5kfzc7bk7nte4efaev2i

Road-Sign Detection and Recognition Based on Support Vector Machines

Saturnino Maldonado-Bascon, Sergio Lafuente-Arroyo, Pedro Gil-Jimenez, Hilario Gomez-Moreno, Francisco Lopez-Ferreras
2007 IEEE transactions on intelligent transportation systems (Print)  
This paper presents an automatic road-sign detection and recognition system based on support vector machines (SVMs).  ...  Our system is able to detect and recognize circular, rectangular, triangular, and octagonal signs and, hence, covers all existing Spanish traffic-sign shapes.  ...  ACKNOWLEDGMENT The authors would like to thank the anonymous reviewers and the editors for their many helpful suggestions, which have greatly improved the presentation of this paper.  ... 
doi:10.1109/tits.2007.895311 fatcat:4xg2myuhinbr5peaaxt5to5a74

On Exact Error Bounds for View-Dependent Simplification

E. Eisemann, X. Décoret
2007 Computer graphics forum (Print)  
In this article we present an analytical closed-form expression to ensure exact error bounds for view-dependent simplification which is of importance for several algorithms.  ...  The approach handles arbitrary polygonal viewcells which allow for free movement in the interior. We show how to compute these regions for mesh points and faces.  ...  Lefebvre for his help with pBuffers and 3DSLib and the reviewers, P. Barla, S. Camerer, M. Eisemann, S. Grabli, S. Hornus, S. Paris, E. Turquin and H. de Almeida Bezerra for their comments.  ... 
doi:10.1111/j.1467-8659.2007.01013.x fatcat:hdtgzh64vbcmrahhhket6hzuam

Geometric Sensing of Known Planar Shapes

Yan-Bin Jia, Michael Erdmann
1996 The international journal of robotics research  
Furthermore, we prove that one can use an algorithm for Discriminating Set with ratio c log n to construct an algorithm for Set Covering with ratio c log n + O(log log n).  ...  Efficient and reliable sensing strategies can be developed for an assembly task if the shape of the part is known in advance.  ...  We wish to thank Matt Mason for his insights and for helping us better interpret the experimental data; Mel Siegel for suggesting a possible optical implementation using a linear CCD coupled with a diverging  ... 
doi:10.1177/027836499601500405 fatcat:jnkv3mlcmveermm2zy4oh6k2r4

Generating 3D Building Models from Architectural Drawings: A Survey

Xuetao Yin, Peter Wonka, Anshuman Razdan
2009 IEEE Computer Graphics and Applications  
Most drawings take the form of floor plans, which portray an orthographic top-down projection of each building level using standardized symbolic representations of the structure's architectural elements  ...  CSDs are used exclusively by design engineers and construction managers and often show internal steel bars, the concrete structure for columns, beams and walls, and pipe and ductwork layouts.  ...  For the first step, systems typically use three groups of algorithms: parametric model fitting, contour tracking, and skeletonization. 12 Parametric model fitting uses a Hough transform to detect lines  ... 
doi:10.1109/mcg.2009.9 pmid:19363955 fatcat:kneygfeubvbo5e4tie4wrqrggu
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