Journal ArticleDOI
The design and use of steerable filters
Reads0
Chats0
TLDR
The authors present an efficient architecture to synthesize filters of arbitrary orientations from linear combinations of basis filters, allowing one to adaptively steer a filter to any orientation, and to determine analytically the filter output as a function of orientation.Abstract:
The authors present an efficient architecture to synthesize filters of arbitrary orientations from linear combinations of basis filters, allowing one to adaptively steer a filter to any orientation, and to determine analytically the filter output as a function of orientation. Steerable filters may be designed in quadrature pairs to allow adaptive control over phase as well as orientation. The authors show how to design and steer the filters and present examples of their use in the analysis of orientation and phase, angularly adaptive filtering, edge detection, and shape from shading. One can also build a self-similar steerable pyramid representation. The same concepts can be generalized to the design of 3-D steerable filters. >read more
Citations
More filters
Journal ArticleDOI
Stimulus vignetting and orientation selectivity in human visual cortex
TL;DR: It is shown that a large body of research that purported to measure orientation tuning may have in fact been inadvertently measuring sensitivity to second-order changes in luminance, and a reinterpretation of a well-established literature on orientation processing in visual cortex is suggested.
Proceedings ArticleDOI
A reliable skin mole localization scheme
TL;DR: This paper presents a framework to detect and label moles on skin images in the presence of clutter, occlusions, and varying imaging conditions and demonstrates the effectiveness of the proposed mole localization scheme.
Journal ArticleDOI
Multiscale directional filter bank with applications to structured and random texture retrieval
TL;DR: The problem of aliasing in decimated bandpass images on directional decomposition is addressed and MDFB is designed to suppress the aliasing effect as well as to minimize the reduction in frequency resolution.
Journal ArticleDOI
Estimation of the orientation of textured patterns via wavelet analysis
TL;DR: This paper is concerned with the estimation of the dominant orientation of textured patches that appear in a number of images (remote sensing, biology or natural sciences for instance) based on the maximization of a criterion that deals with the coefficients enclosed in a wavelet decomposition of the original image.
Journal ArticleDOI
Texture coding using a Wold decomposition model
TL;DR: An algorithm for estimating and coding the texture model parameters is presented, and it is shown that the suggested algorithm yields high-quality reconstructions at low bit rates.
References
More filters
Journal ArticleDOI
A Computational Approach to Edge Detection
TL;DR: There is a natural uncertainty principle between detection and localization performance, which are the two main goals, and with this principle a single operator shape is derived which is optimal at any scale.
Journal ArticleDOI
A theory for multiresolution signal decomposition: the wavelet representation
TL;DR: In this paper, it is shown that the difference of information between the approximation of a signal at the resolutions 2/sup j+1/ and 2 /sup j/ (where j is an integer) can be extracted by decomposing this signal on a wavelet orthonormal basis of L/sup 2/(R/sup n/), the vector space of measurable, square-integrable n-dimensional functions.
Journal ArticleDOI
Methods of Theoretical Physics. By P.M. Morse and H. Feschbach. 2vols., Pp.xxii, 1978. 120s. each vol. 1953.(McGraw-Hill)
Book
Methods of Mathematical Physics
Richard Courant,David Hilbert +1 more
TL;DR: In this paper, the authors present an algebraic extension of LINEAR TRANSFORMATIONS and QUADRATIC FORMS, and apply it to EIGEN-VARIATIONS.