Boots – shoes – and leggings
Patent
1988-02-01
1995-05-09
Hayes, Gail O.
Boots, shoes, and leggings
G06F 1548
Patent
active
054146224
ABSTRACT:
The present invention includes a back projector (44) suitable for assisting in the reconstruction of computerized tomography projection data. In particular it provides a fast and universal back projection system which can accomodate virtually any scanner geometry. The back projector (44) is based on an algorithm which involves the scaling of an image matrix pixel location to determine a pointer into a projection data memory (114). A linearization memory (112) contains pointers into a projection data memory (114). The location of the pixel is used to determine the proper location within the linearization memory (112) preferably using a linear interpolation process. The projection data contained in memory (114) is also preferably extracted using a similar interpolation process.
REFERENCES:
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patent: 4620153 (1986-10-01), Hino
patent: 4626991 (1986-12-01), Crawford
patent: 4656584 (1987-04-01), Katsumato
patent: 4680709 (1987-07-01), Srinivasan
"Software Tools in Pascal", B. W. Kernighan, P. J. Plauger, pp. 275-283, 1981.
Lakshaminarayanan, A. V., "Reconstruction from Divergent Ray Data", Technical Report No. 92, State University of N.Y. at Buffalo, Dept. of Computer Science, Jan. 1975.
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