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- Ian Barrodale, F. D. K. Roberts
- Commun. ACM
- 1974

Submittal of an algorithm for consideration for publication in Communicat ions of the A C M implies unrestricted use of the algorithm within a computer is permissible. Copyright @ 1974, Association for Computing Machinery, Inc. General permission to republish, but not for profit, all or part of this material is granted provided that ACM's copyright notice… (More)

- Ian Barrodale, D. Skea, M. Berkley, R. Kuwahara, R. Poeckert
- Pattern Recognition
- 1993

- Ian Barrodale, F. D. K. Roberts
- ACM Trans. Math. Softw.
- 1980

subject to the given constraints (2) and (3). (In expression (4), b, denotes the ith component of b and A, denotes the ith row of A.) The method is completely general in the sense that no restrictions are imposed on the ranks of the matrices A, C, and E, or on the signs of the elements of f. Furthermore, if no vector x satisfying (2) and (3) exists, the… (More)

- Ian Barrodale, R. Kuwahara, R. Poeckert, D. Skea
- Numerical Algorithms
- 1993

The development of reliable software tools to aid human interpretation of complex digital images is of increasing importance. In particular, change detection requires that two or more images be carefully overlaid (registered) using digital techniques that compensate for picture distortions caused by sensor motion, ambient conditions, etc. We are primarily… (More)

- Ian Barrodale, F. D. K. Roberts, C. R. Hunt
- Comput. J.
- 1970

This paper describes an algorithm for computing best l\, k and /(D approximations to discrete data, by functions of several parameters which depend nonlinearly on just one of these parameters. Such functions (e.g. «i + a2ef , a\ + a2 sin ex, (ai + a2x)l(l + ex)) often occur in practice, and a numerical study confirms that it is feasible to compute best… (More)

- C.A. Zala, Ian Barrodale, C Lucas, R. N. MacKinnon
- Conference Proceeding IEEE Pacific Rim Conference…
- 1989

A formulation of the maximum entropy (ME) method is described, where the data constraints are expressed in the form of fixed bounds on the elements of an orthogonal transform of the model. The bounds are set on the basis of both the observed data and an estimate of the noise statistics in the transform domain; prior knowledge, if available, can also be… (More)

- D. Skea, Ian Barrodale, R. Kuwahara, R. Poeckert
- Pattern Recognition
- 1993

-A general procedure for point matching is outlined which deals effectively with the dual problems of finding matches between two point sets and correctly identifying missing or spurious points. Point matching Accumulator Image registration Sphericity

- Ian Barrodale, C. Phillips
- ACM Trans. Math. Softw.
- 1975

Received 3 June 1974 and 28 January 1975. Copyright (~) 1975, Association for Computing Machinery, Inc. General permission to republish, but not for profit, all or part of this material is granted provided that ACM's copyright notice is given and that reference is made to the publication, to its date of issue, and to the fact that reprinting privileges were… (More)

- Fausto Milinazzo, Cedric A. Zala, Ian Barrodale
- IEEE Trans. Acoustics, Speech, and Signal…
- 1987

When analyzing linear systems of equations, the most important indicator of potential instability is the condition number of the matrix. For a convolution matrix W formed from a series w (where Wij wi-, + ,, 1 5 i j + 1 5 k , W,j = 0 otherwise), this condition number defines the stabirity of the deconvolution process. For the larger convolution matrices… (More)

- Cedric A. Zala, Ian Barrodale
- Adv. Comput. Math.
- 1999