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Extraction of Shape Skeletons from Grayscale Images

Z.Sibel Gőktepe Tari, Jayant Shah, Homer Pien
1997 Computer Vision and Image Understanding  
Since it is seldom possible to extract complete shape skeletons to arrive at the essential skeleton of the shape outlines from a noisy grayscale image, this is obviously a very [17] .  ...  The key point is that the edge strength may be calculated from grayscale images without first extracting losophy behind segmentation functionals is to introduce the shape outline.  ...  the shape outline has already been extracted in the form of a closed curve from the grayscale image.  ... 
doi:10.1006/cviu.1997.0612 fatcat:b7tgkorltrg55bmiqedao3spb4

Robust extraction of 1D skeletons from grayscale 3D images

Emilio Antunez, Leonidas Guibas
2008 Pattern Recognition (ICPR), Proceedings of the International Conference on  
The resulting grayscale skeletonization routine extracts a topologically-consistent skeleton of curve-like features at all scales and intensities of the image.  ...  We propose novel thinning conditions for grayscale 3D images that do not rely on image thresholding or segmentation.  ...  Extracting a skeleton from one or more binary versions of the image can be unnecessarily costly and yield fragile results.  ... 
doi:10.1109/icpr.2008.4761733 dblp:conf/icpr/AntunezG08 fatcat:nmkqwj2zzjajbeajdcq4wyo34e

Segmentation-free skeletonization of grayscale volumes for shape understanding

Sasakthi S. Abeysinghe, Matthew Baker, Wah Chiu, Tao Ju
2008 2008 IEEE International Conference on Shape Modeling and Applications  
In this paper, we present a new skeletonization algorithm on grayscale volumes typical to medical imaging (e.g., MRI, CT and EM scans), for the purpose of identifying shape components.  ...  Computer-based understanding of these structures can often benefit from the knowledge of shape components, particularly rod-like and plate-like parts, in such volumes.  ...  ACKNOWLEDGEMENTS We would like to thank Zeyun Yu for the implementation of the method in [22] , Philips Research for the "Bones" and "Blood Vessels (CT)" data sets andÖzlem Gürvit of the Institute for  ... 
doi:10.1109/smi.2008.4547951 dblp:conf/smi/AbeysingheBCJ08 fatcat:6ndzrcyb3jgtzomwqp66d3ddim

Linear Extraction of Satellite Imageries using Mathematical Morphology

Ms.Neeti Daryal, Dr. Vinod Kumar
2010 International Journal of Computer Applications  
The application of routines in image processing is aimed initially to improve the visual quality of the features of interest in digital grayscale images, which will then afterwards be extracted.  ...  Methodology adapted to skeleton scanned images using Mathematical Morphology from remotely sensed data is a challenging issue in the field of digital image processing.  ...  In next step Skeletonization is performed through thinning because Skeletonization is especially suited to the processing of binary images or grayscale images.  ... 
doi:10.5120/717-1009 fatcat:5wqad4gt7zgxxnoorm4m3rbsx4

Convective clouds modelling and tracking by an airborne radar

Clementine Costes, Rene Garello, Gregoire Mercier, Jean-Paul Artis, Nicolas Bon
2008 OCEANS 2008  
Clouds are non-rigid heterogeneous objects; a good representation of the weather scene is performed by extracting skeletal lines of the 2-dimensional grayscale pictures.  ...  Skeletons are reduced to sets of segments within a graph structure and tracked among successive pictures by means of relaxation labelling processes.  ...  Skeleton and grayscale skeleton Morphological skeleton is computed starting from a binary picture (e.g. resulting of a thresholding operation on a graytone picture).  ... 
doi:10.1109/oceans.2008.5151884 fatcat:bnj2g3e23zf5xkrz6hrkqgpxsi

A SURVEY ON ROAD EXTRACTION FROM COLOR IMAGE USING VECTORIZATION

Nisha Sharma .
2013 International Journal of Research in Engineering and Technology  
In this paper we review various research papers of road extraction methods. Most of the work focused on road extraction from grayscale images.  ...  Road extraction can be defined as extracting the roads from an image by accessing it through the features of road.  ...  It extract linear object from grayscale image by performing CDT and Skeletonization operations on the preprocessed image.  ... 
doi:10.15623/ijret.2013.0210068 fatcat:yqxc5xdndvhutmcujcuf67gj7m

Skeletonization by Gradient Regularization and Diffusion

F. LeBourgeois, H. Emptoz
2007 Proceedings of the International Conference on Document Analysis and Recognition  
This paper describes a skeletonization process for grayscale or color images based on the diffusion of the color gradient vectors by using a simple iterative regularization scheme.  ...  Our approach is very simple to implement and can be applied to natural noisy color images of old documents.  ...  The skeleton is extracted by tracking the ridges of this edge strength map. An homothetic erosion of the grayscale image is also used to extract skeletons [13] .  ... 
doi:10.1109/icdar.2007.4377089 dblp:conf/icdar/LebourgeoisE07 fatcat:37jvehn77vejrnvp6fotjhgex4

Skeletonization by Gradient Diffusion and Regularization

F. Le Bourgeois, H. Emptoz
2007 2007 IEEE International Conference on Image Processing  
This paper describes a skeletonization process for grayscale or color images which uses the diffusion of the image gradient vectors.  ...  We propose to diffuse the native gradients of the color images to obtain the skeleton of the main contrasted objects.  ...  The skeleton is extracted by tracking the ridges of this edge strength map. An homothetic erosion of the grayscale image is also used to extract skeletons [12] .  ... 
doi:10.1109/icip.2007.4379239 dblp:conf/icip/BourgeoisE07 fatcat:7fppdi5jcrahbon7qiy6kyi7ra

Scan-Conversion Algorithm for Ridge Point Detection on Tubular Objects [chapter]

Sukmoon Chang, Dimitris N. Metaxas, Leon Axel
2003 Lecture Notes in Computer Science  
In medical imaging, the extraction and representation of such structures are of clinical importance.  ...  We present various results of the method using CLSM (Confocal Laser Scanning Microscopy) images of blood fibrins and CT images of a skull and lungs.  ...  (a) Skeleton surfaces from distance map. (b) Skeleton points from GVF field. (c) Skeleton curve after pruning by eigenanalysis. Fig. 4 . 4 (a), (b) CLSM images of blood fibrin.  ... 
doi:10.1007/978-3-540-39903-2_20 fatcat:utkauavxvzgxfcmly4ptercvvu

The skeleton structure—An improved compression algorithm with perfect reconstruction

D. N. Vizireanu, C. Pirnog, V. Lãzãrescu, A. Vizireanu
2001 Journal of digital imaging  
Reconstruction of the Image From Its Skele on Representation The original shape X can be perfectly reconstructed from its skeleton or structure rep)esentation in the following way: (4) X = U Sn(X) EB nB  ...  Mathematical morphology involves the study of the different ways in which a structuring element interacts with a given set, modifies its shape, and extracts the resultant set.  ...  CONCLUSIONS The skeleton structure is a new and improved method for removing the redundant points from the morphologic skeleton of a binary image.  ... 
doi:10.1007/bf03190354 pmid:11442113 pmcid:PMC3452704 fatcat:daf6c44stzhpxbscsxqaiwwfaa

Using scale space filtering to make thinning algorithms robust against noise in sketch images

Houssem Chatbri, Keisuke Kameyama
2014 Pattern Recognition Letters  
Our framework derives multiple representations of an input image within multiple scales of filtering.  ...  We apply scale space filtering to thinning of binary sketch images by introducing a framework for making thinning algorithms robust against noise.  ...  Their algorithm generates filtered versions of an image, then it extracts the skeleton by finding the peak, ridge and saddle points in the grayscale filtered image.  ... 
doi:10.1016/j.patrec.2014.01.011 fatcat:c56igbfkczcmbnka54y6xkqlfy

A skeleton based binarization approach for video text recognition

Haojin Yang, Bernhard Quehl, Harald Sack
2012 2012 13th International Workshop on Image Analysis for Multimedia Interactive Services  
First, the text gradient direction is approximated by analyzing the content distribution of image skeleton maps.  ...  Then, the text seed-pixels are selected by calculating the average grayscale value of skeleton pixels. And finally, an automated seed region growing algorithm is applied to obtain the text pixels.  ...  Subsequently, we calculate the average grayscale value of skeleton pixels, which are extracted in the correct text gradient direction.  ... 
doi:10.1109/wiamis.2012.6226754 dblp:conf/wiamis/YangQS12 fatcat:twxph6667fb5dpkhzxpxtfznf4

Morphological Image Analysis for Computer Vision Applications [chapter]

Y.V. Vizilter, Y.P. Pyt'ev, A.I. Chulichkov, L. M. Mestetskiy
2014 Intelligent Systems Reference Library  
It is shown how the tasks of change detection and shape matching in images can be solved using a morphological image analysis.  ...  The continuous binary morphology based on a computational geometry is presented as a very fast approach to shape representation via real-time computation of figures' skeletons.  ...  Special thanks are to Russian Fund of Basic Researches supported the morphological researches by a series of grants.  ... 
doi:10.1007/978-3-319-10653-3_2 fatcat:fr5ymfzskzewdkrwipgmrdyr6m

Stroke Width Based Skeletonization for Text Images

Minh Hieu Nguyen, Soo-Hyung Kim, Hyung Jeong Yang, Guee Sang Lee
2014 Journal of Computing Science and Engineering  
This paper proposes a novel approach to the skeletonization of text images based on stroke width detection.  ...  Second, the preliminary skeleton is smoothed, and junction points are connected by interpolation compensation. Experimental results show the validity of the proposed approach.  ...  Preliminary Skeleton Extraction Step 1. Find edge pixels in a grayscale image using the Canny method. Step 2. Estimate normal vectors of edge pixels using gradient and tensor voting methods. Step 3.  ... 
doi:10.5626/jcse.2014.8.3.149 fatcat:fmbaopznxjbb7ltbifrdfywrru

Skeleton optimization of neuronal morphology based on three-dimensional shape restrictions

Siqi Jiang, Zhengyu Pan, Zhao Feng, Yue Guan, Miao Ren, Zhangheng Ding, Shangbin Chen, Hui Gong, Qingming Luo, Anan Li
2020 BMC Bioinformatics  
One restriction is designed based on the grayscale image, and the other is designed based on geometry.  ...  With this method, we design the three-dimensional shape restriction workflow of neuronal skeleton adjustment computation.  ...  Availability of data and materials All the image datasets supporting the conclusions of the article are available, and can be obtained via contacting the corresponding author A.  ... 
doi:10.1186/s12859-020-03714-z pmid:32887543 fatcat:cpddkk4gdjdmvcuswgyipc4ymm
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