Image analysis – Image transformation or preprocessing – Combining image portions
Patent
1998-04-15
2000-01-25
Couso, Yon J.
Image analysis
Image transformation or preprocessing
Combining image portions
382131, G06K 936
Patent
active
060186003
ABSTRACT:
A method and apparatus are provided for acquiring and reconstructing an image. The method includes the steps of obtaining prior knowledge of the image, possibly by coarse sampling of the image and using the obtained prior knowledge of the image to identify relative locations of structures having relatively high contrast edges. The method further includes the steps of prescribing a set of k-space locations based upon the relative locations of the structures in order to achieve comparable eigenvalues of a reconstruction matrix and sampling the k-space at the prescribed k-space locations to obtain k-space sample data. The k-space sample data are decomposed into background data and edge data. The background data are Fourier transformed to reconstruct a background image component. Similarly, subsets of the edge data are Fourier transformed and the reconstruction matrix is used to form a linear combination of these Fourier transformations in order to reconstruct an edge image component. Finally, the background image component and the edge image component are combined to generate a final image.
REFERENCES:
patent: 4908573 (1990-03-01), Kaufman et al.
patent: 5276614 (1994-01-01), Heuscher
patent: 5305204 (1994-04-01), Ohhashi
Beaty, M.G., et al., Derivative Sampling for Multiband Signals, Numer. Funct. Anal. and Optimiz., 20(9&10), 875-898 (1989).
Beaty, M.G., et al., The Distribution of Sampling Rates for Signals with Equally Wide, Equally Spaced Spectral Bands, 54(4) SIAM J. Appl. Math 893-906 (Jun., 1993).
Beatty, M.G., Multichannel sampling for multiband signals, 36 Signal Processing 133-138 (1994).
Bezuglaya, L., et al., The Sampling Theorem for Functions with Limited Multi-Band Spectrum I, 12 Zeitschift fur Analysis und ihre Anwendungen 511-534 (1993).
Bracewell, R.N., Two-Dimensional Aerial Smoothing in Radio Astronomy (1956).
Butzer, P.L., A Survey of the Whittaker-Shannon Smapling Theorem and Some of its Extensions, 3(1) Journal of Mathematical Research and Exposition 185-212 (Jan., 1983).
Dodson, M.M., et al.,Fourier Analysis and the Smapling Theorem, 85A(1) Proc. R. Ir. Acad. 81-108 (1985).
Grochenig, K.,A New Approach to Irregual Samplingn of Band-Limited Functions, Recent Advances in Fourier Analysis and Its Applications (Byrnes et al., eds.) 251-260 (Kluwer Academic Publishers, 1990).
Higgins, J.R.,Sampling Theory in Fourier and Signal Analysis, Chapter 10 (Clarendon Press, 1996).
Jerri, A.J., The Shannon Sampling Theorem-Its Various Extensions and Applications: A Tutorial Review 65(11) Proceedings of the IEEE 1565-1596 (Nov., 1977).
Landau, H.J.,Necessary Density Conditions for Sampling and Interpolation of Certain Entire Functions (Bell Telephone Laboratories, 1966).
Linden, D.A.,A discussion of Sampling Theorems, Proceedings of the IRE 1219-1226 (1958).
Walter, G.G., Recent Extension of the Sampling Theorem, Signal Processing, Part I: Signal Processing Theory (Auslander et al., eds.) 229-238 (Springer-Verlag, 1990).
Levin David N.
Nagle Scott
Arch Development Corp.
Couso Yon J.
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