Sign in
Author

Conference

Journal

Organization

Year

DOI
Look for results that meet for the following criteria:
since
equal to
before
between
and
Search in all fields of study
Limit my searches in the following fields of study
Agriculture Science
Arts & Humanities
Biology
Chemistry
Computer Science
Economics & Business
Engineering
Environmental Sciences
Geosciences
Material Science
Mathematics
Medicine
Physics
Social Science
Multidisciplinary
Keywords
(4)
Coordinate System
Edge Detection
Flow Field
Visual Analysis
Related Publications
(58)
Texture analysis using twodimensional quadrature filters
Anisotropic Nonstationary Image Estimation and Its Applications: Part IRestoration of Noisy Images
Adaptive multidimensional filtering
Anisotropic spectral magnitude estimation filters for noise reduction and image enhancement
Signal processing for computer vision
Subscribe
Academic
Publications
Analyzing Oriented Patterns
Analyzing Oriented Patterns,Michael Kass,Andrew P. Witkin
Edit
Analyzing Oriented Patterns
(
Citations: 190
)
BibTex

RIS

RefWorks
Download
Michael Kass
,
Andrew P. Witkin
Oriented patterns, such as those produced by propaga tion, accretion, <>r deformation, ore common in nature and therefore an important class for visual analysis. Our ap proach to understanding such patterns is to decompose them into two parts: a flow field, describing the direction of anisotropy, and the residual pattern obtained by de scribing the image in a
coordinate system
built, from the flow field. We develop a method for the local estimation of anisotropy and a method for combining the estimates to construct a flow coordinate system. Several examples of the use of these methods are presented. These included the use of the (low coordinates to provide preferred di rections for edge detection, detection of anomalies, fitting simple models to the straightened pattern, and detecting singularities in the flow field.
Conference:
International Joint Conference on Artificial Intelligence  IJCAI
, pp. 944952, 1985
Cumulative
Annual
View Publication
The following links allow you to view full publications. These links are maintained by other sources not affiliated with Microsoft Academic Search.
(
research.microsoft.com
)
(
www.informatik.unitrier.de
)
Citation Context
(98)
...derivative information). It has been shown that the njet completely describes the derivative structure of an image (
Kass and Witkin 1987;
Koenderink and van Doorn 1987)...
...The derivative structure of an image is described (in a complete sense) by means of the njet, see (Koenderink and van Doorn 1987) and (
Kass and Witkin 1987
)...
Arjan Gijsenij
,
et al.
Generalized Gamut Mapping using Image Derivative Structures for Color ...
...The orientation field describes the coarse struc ture of nerve fibres in the CCM images and has been proven to be of a fu ndamental importance in many image analysis applications [11,
12
] . Using the least mean square algorithm [10], the local orientation �ij of the block centred at pixel (i,j), Equation (3), is computed using the following equations [11],...
M. A. Dabbah
,
et al.
Nerve Fibre Extraction in Confocal Corneal Microscopy Images for Human...
...The motivation for the proposed method can be found by analysing the almost exclusively used method in literature for orientation smoothing, proposed by Witkin and Kass [
5
] more than two decades ago...
...The almost exclusively used method in literature as well as in commercial fingerprint matching modules for smoothing orientation has been brought up by Witkin and Kass [
5
] more than 20 years ago...
...Witkin and Kass [
5
] proposed the doubling of the orientation angle (sometimes also denoted as squaring the orientation vector, see [1])...
...Every orientation smoothing approach which is based on the above mentioned approach of Witkin and Kass [
5
], will have a poor smoothing capability in high curvature areas...
...In 1(b) the orientation field after vectorial smoothing (using the approach of Witkin and Kass [
5
]) can be seen...
...Both methods base their smoothing feature on the doubled angle averaging method of Witkin and Kass [
5
]...
...The motivation for the second step can be found by analysing the almost exclusively used method in literature for orientation smoothing, proposed by Witkin and Kass [
5
] more than 20 years ago...
Surinder Ram
,
et al.
Curvature preserving fingerprint ridge orientation smoothing using Leg...
...Traditional approaches usually extract the orientation flow directly by computing the intensity gradient from the input fingerprint image [
3
, 4, 5, 6]. The results are then commonly smoothed by some local averaging, diffusion, or voting methods in order to reduce the effects of noise [7, 8, 9]. These type of methods usually work fairly well for a large number of good quality fingerprint images, but we believe that they can be improved for ...
Kuangchih Lee
,
et al.
Probabilistic orientation field estimation for fingerprint enhancement...
...The local orientation in the image is obtained by calculating the first derivatives in two orthogonal directions (
Kass and Witkin, 1987
) and the edge orientation can be simply determined using the expression illustrated in equation 1...
Dana Elena Ilea
,
et al.
Evaluation of local orientation for texture classification
References
(12)
Understanding Image Intensities
(
Citations: 278
)
Berthold K. P. Horn
Journal:
Artificial Intelligence  AI
, vol. 8, no. 2, pp. 201231, 1977
Recovering Intrinsic Scene Characteristics from Images
(
Citations: 263
)
H. G. Barrow
,
J. M. Tenenbaum
Conference:
International Conference on Computer Vision Systems  ICVS
, 1978
Global and local deformations of solid primitives
(
Citations: 512
)
Alan H. Barr
Journal:
ACM Siggraph Computer Graphics
, vol. 18, no. 3, pp. 2130, 1984
Moir'e effect from random dots
(
Citations: 103
)
L. Glass
Journal:
Nature
, 1969
Early Processing of Visual Information
(
Citations: 386
)
D. Marr
Journal:
Philosophical Transactions of The Royal Society B: Biological Sciences
, vol. 275, no. 942, pp. 483519, 1976
Sort by:
Citations
(190)
Continuous Orientation Representation for Arbitrary Dimensions  A Generalized Knutsson Mapping
Bernd Rieger
,
Lucas J. van Vliet
,
Piet W. Verbeek
Conference:
Scandinavian Conference on Image Analysis
, pp. 774783, 2011
Generalized Gamut Mapping using Image Derivative Structures for Color Constancy
(
Citations: 7
)
Arjan Gijsenij
,
Theo Gevers
Journal:
International Journal of Computer Vision  IJCV
, vol. 86, no. 23, pp. 127139, 2010
Synthesis of gradient algorithms with the minimum systematic error for estimating directional fields
(
Citations: 1
)
I. S. Gruzman
,
V. B. Karpushin
Journal:
Optoelectronics, Instrumentation and Data Processing
, vol. 46, no. 1, pp. 18, 2010
Automatic Robust Neurite Detection and Morphological Analysis of Neuronal Cell Cultures in Highcontent Screening
(
Citations: 2
)
Chaohong Wu
,
Joost Schulte
,
Katharine J. Sepp
,
J. Troy Littleton
,
Pengyu Hong
Journal:
Neuroinformatics
, vol. 8, no. 2, pp. 83100, 2010
Adaptive approach to fingerprint image enhancement
Li Wang
,
Nandita Bhattacharjee
,
Gopal K. Gupta
,
Bala Srinivasan
Conference:
Advances in Mobile Multimedia  MoMM
, pp. 4249, 2010