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Bounded irregular pyramid: a new structure for color image segmentation

R. Marfil, J.A. Rodrı́guez, A. Bandera, F. Sandoval
2004 Pattern Recognition  
Hence, the size of the irregular pyramid is bounded. Segmentation is performed by rearranging the set of links among pyramid nodes.  ...  This paper presents a new segmentation technique for color images. It relies on building an irregular pyramid into a regular one, presenting only nodes associated to homogeneous color regions.  ...  Valid nodes are linked to homogeneous regions at the base.  ... 
doi:10.1016/j.patcog.2003.08.012 fatcat:uzhgtdmzmvfkdcpzcvvyningo4

Co-parent selection for fast region merging in pyramidal image segmentation

Milos Stojmenovic, Andres Solis-Montero, Amiya Nayak
2010 2010 2nd International Conference on Image Processing Theory, Tools and Applications  
Our algorithm is fast (produces segmentations within seconds), results in the correct segmentation of elongated and large regions, very simple compared to plethora of existing algorithms, and appears competitive  ...  In this paper, we also introduce the concept of a co-parent node for possible region merging at the end of each iteration.  ...  We compared our co-parent link shifting (CPLS) algorithm to the link shifting (LS) segmentation algorithm proposed by [9] .  ... 
doi:10.1109/ipta.2010.5586811 dblp:conf/ipta/StojmenovicMN10 fatcat:bcufjzudvvccleil26hzw6rywm

Colour and texture based pyramidal image segmentation

Milos Stojmenovic, Andres Solis-Montero, Amiya Nayak
2010 2010 International Conference on Audio, Language and Image Processing  
The input image size is no longer constrained as in [BHR], [SSN] and other similar regular pyramid based approaches due to a modification of the pyramid construction rule.  ...  Our algorithm is fast (produces segmentations within seconds), results in the correct segmentation of elongated and large regions, very simple compared to plethora of existing algorithms, and appears competitive  ...  shift variability and handling elongated objects.  ... 
doi:10.1109/icalip.2010.5685096 fatcat:7rpd337agrec3g4mdk5kahndcq

Pyramidal segmentation using higher-order local auto-correlations and its applications to Landsat forestry data

Milos Stojmenovic, Takumi Kobayashi, Nobuyuki Otsu
2010 2010 IEEE International Conference on Image Processing  
Recently, a link shifting based pyramidal segmentation method was proposed to resolve existing problems with elongated regions.  ...  The goal of image segmentation is to partition an image into regions that are internally homogeneous and heterogeneous with respect to neighbouring regions.  ...  Pyramidal segmentation Algorithm LS (Link Shifting) [7] is inspired by the regular pyramid linked approach (PLA) [3] .  ... 
doi:10.1109/icip.2010.5654101 dblp:conf/icip/StojmenovicKO10 fatcat:7tzbnnsdsfcgvarbapkke4ziy4

Pyramid segmentation algorithms revisited

R. Marfil, L. Molina-Tanco, A. Bandera, J.A. Rodríguez, F. Sandoval
2006 Pattern Recognition  
Segmentation algorithms based on regular and irregular pyramids are described, together with the data structures and decimation procedures which encode and manage the information in the pyramid.  ...  The main goal of this work is to compare pyramidal structures proposed to solve segmentation tasks.  ...  Bertolino for their unselfish help. Special thanks are due to Dr. J. M. Jolion for his aid to implement the colour irregular pyramid and provides us the source code of the algorithm proposed in Ref.  ... 
doi:10.1016/j.patcog.2006.02.017 fatcat:f744w7onubh6ppz43r23vz2bkm

Curvilinear Image Regions Detection: Applications to Mobile Robotics

J. M. Perez-Lorenzo, A. Bandera, R. Marfil, R. Vázquez-Martín
2010 EURASIP Journal on Advances in Signal Processing  
This paper proposes a novel approach for visual features detection, which is based on the presence of objects whose shape can be modelled using cylinders or generalized cylinders.  ...  Our detector reliably finds the same curvilinear regions under different viewing conditions.  ...  Firstly, the original image is segmented into homogeneous colour regions using a pyramid algorithm based on the Bounded Irregular Pyramid (BIP) [6] .  ... 
doi:10.1155/2011/145232 fatcat:2g4aw74q7vf7bllumy7jebjm4a

A Review on Graph Based Segmentation

K. Santle Camilus, V. K. Govindan
2012 International Journal of Image Graphics and Signal Processing  
The major four categorizations we have employed for the purpose of review are: graph cut based methods, interactive methods, minimum spanning tree based methods and pyramid based methods.  ...  In addition, the review highlights the need for creating a database for benchmarking intensity based algorithms, and the need for further research in graph based segmentation for automated real time applications  ...  However, these types of pyramid solve the problems associated with the regular pyramids such as shift variance and inability to segment elongated objects.  ... 
doi:10.5815/ijigsp.2012.05.01 fatcat:wwguetls4nf67b2xoiu4xlktuu

Generalization of shifted fovea multiresolution geometries applied to object detection [chapter]

Fabián Arrebola, Pelegrín Camacho, Francisco Sandoval
1997 Lecture Notes in Computer Science  
Besides, we introduce the multiresolution data structure to manipulate and process this type of foveal geometries, as well as the results obtained after applying hierarchical algorithms for segmentation  ...  The concept is based on increasing the degrees of freedom and the related number of configuration parameters and the application of a new shifting algorithm which allows a higher number of fixation points  ...  The algorithm is based on the Multiresolution Pixel Linking algorithm for pyramidal structures given by Butt and Rosenfeld [6] [7] .  ... 
doi:10.1007/3-540-63508-4_158 fatcat:x52jjfdngbepld4a55vd42wbei

Hierarchical Hough transform based on pyramidal architecture

C. Espinosa, M.A. Perkowski
1992 Eleventh Annual International Phoenix Conference on Computers and Communication [1992 Conference Proceedings]  
In this paper a hierarchical Hough Transform (HT) based on pyramidal architecture is described, being a main component of the low-to-medium spatial vision subsystem for a mobile robot.  ...  The scheme is very well suited for parallelkation.  ...  Nevatia and Babu [24] linked edge elements based on proximity and orientation and approximated the linked elements by piecewise linear segments.  ... 
doi:10.1109/pccc.1992.200515 fatcat:fahbn6wtc5guzhlot55p5h5abu

Alpha-tree segmentation of human anatomical photographic imagery

Wilbert Tabone, Michael H. F. Wilkinson, Anne E. J. V. Gaalen, Janniko Georgiadis, George Azzopardi
2019 Proceedings of the 2nd International Conference on Applications of Intelligent Systems - APPIS '19  
The manual segmentation of such images and the subsequent labelling of regions is a very laborious task.  ...  We use a morphological tree-based segmentation method, known as the alpha-tree, together with a Humoment thresholding mechanism in order to extract segments from a number of structures.  ...  We propose an algorithm that is based on the alpha-tree combined with Hu moments for the segmentation of such images.  ... 
doi:10.1145/3309772.3309776 dblp:conf/appis/TaboneWGGA19 fatcat:j3bkywltwbexzffnoqnqkkizg4

Forensic Textile Fibre Matching by Multiresolution Planning and Colour Space Pattern Recognition

G. J. McEwen, A. J. Wilkinson
1988 Procedings of the Alvey Vision Conference 1988  
It is based on a mult{resolution image format and incorporates progressive plan refinement.  ...  Colour is a key element in the discrimination and matching of textile fibres for forensic purposes.  ...  The goal has shifted to the recognition of specific objects or regions where colour is the primary discriminatory feature, the objects or regions being otherwise similar.  ... 
doi:10.5244/c.2.35 dblp:conf/bmvc/McEwenW88 fatcat:u7l5nasinjadxfxhenyzpjwaim

Traveling Theta Waves along the Entire Septotemporal Axis of the Hippocampus

Jagdish Patel, Shigeyoshi Fujisawa, Antal Berényi, Sébastien Royer, György Buzsáki
2012 Neuron  
We recorded theta oscillations along the entire extent of the septotemporal axis of the hippocampal CA1 pyramidal layer.  ...  The majority of concurrently recorded units were phase-locked to the local field theta at all dorsoventral segments.  ...  Distances are measured from the septal end of the CA1 pyramidal region (0 mm).  ... 
doi:10.1016/j.neuron.2012.07.015 pmid:22884325 pmcid:PMC3427387 fatcat:eqchnkpyyvaihbgcazjmbypbga

Man-made objects cuing in satellite imagery

Alexei N. Skurikhin, Ivan Kadar
2009 Signal Processing, Sensor Fusion, and Target Recognition XVIII  
We present a multi-scale framework for man-made structures cuing in satellite image regions. The approach is based on a hierarchical image segmentation followed by structural analysis.  ...  The presented framework can be used as pre-scanning tool for wide area monitoring to quickly guide the further analysis to regions of interest.  ...  They can be created using such approaches as watershed based segmentation (Vincent et aI, 1991 ) , and Mean Shift that is a kernel based density estimation technique (Fukunaga et aI, 1975 We emphasize  ... 
doi:10.1117/12.819083 fatcat:nfxtbueiwvegdbd6djwulkplyy

Image Matching based on Curvilinear Regions [chapter]

J. Perez, R. Vazquez, R. Marfil, A. Bandera, F. Sandoval
2007 Vision Systems: Segmentation and Pattern Recognition  
However, regular pyramids can suffer several problems (Bister et al., 1990) : nonconnectivity of the obtained receptive fields, shift variance, or incapability to segment elongated objects.  ...  Image segmentation based on the Bounded Irregular Pyramid In our approach, image segmentation is employed to obtain a global set of image regions.  ...  The first nine chapters on segmentation deal with advanced algorithms and models, and various applications of segmentation in robot path planning, human face tracking, etc.  ... 
doi:10.5772/4959 fatcat:dccmjusz6zdd3axc5wce7l43he

Conformational changes in Lassa virus L protein associated with promoter binding and RNA synthesis activity [article]

Tomas Kouba, Dominik Vogel, Sigurdur R. Thorkelsson, Emmanuelle R. J. Quemin, Harry M. Williams, Morlin Milewski, Carola Busch, Stephan Guenther, Kay Gruenewald, Maria Rosenthal, Stephen Cusack
2021 bioRxiv   pre-print
In this configuration, the full C-terminal region of the L protein, including the putative cap-binding domain, is highly ordered.  ...  The structural data are complemented by in vitro and cell-based studies testing a broad range of L protein mutants to probe functional relevance.  ...  Acknowledgements We acknowledge the European Synchrotron Radiation Facility for provision of beam time on CM01 and we would like to thank Daouda A.K. Traore for assistance.  ... 
doi:10.1101/2021.06.24.449696 fatcat:fndb527tnnavzeyfq35jukri7u
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