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  • 1
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    Image registration using binary boundary maps (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Registration technique that matches binary boundary maps extracted from raw data, rather than matching actual data, is considerably faster than other techniques. Boundary maps, which are digital representations of regions where image amplitudes change significantly, typically represent data compression of 60 to 70 percent. Maps allow average products to be computed with addition rather than multiplication, further reducing computation time.
    Keywords: MATHEMATICS AND INFORMATION SCIENCES
    Type: MFS-23043 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Generating Random Number Pairs (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Algorithm generates pairs drawn from bivariate normal distribution with any desired values of two means, two standard deviations, and correlation coefficient.
    Keywords: MATHEMATICS AND INFORMATION SCIENCES
    Type: MFS-27039 , NASA Tech Briefs (ISSN 0145-319X); 8; 1; P. 150
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Larger Convergence Zones for Newton's Method (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Iterative technique applies over wider range of initial guesses. New theorem describes convergence zone of Newton's iterative method for finding zeros of real function. Involves two points, Xp and Xp*, called primary conjugate points. If exact solution lies between these points (Xp is less than Xz is less than Xp*) and no other conjugate points in interval, then according to theorem, subsequent iterations will converge upon exact solution if initial guess lies in interval.
    Keywords: MATHEMATICS AND INFORMATION SCIENCES
    Type: MFS-27124 , NASA Tech Briefs (ISSN 0145-319X); 10; 4; P. 135
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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