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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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    Nationwide forestry applications program: Corrections to forest reflectance as a function of low Sun angle and slope (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: There are no author-identified significant in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E80-10100 , NASA-CR-160470 , LEC-13188
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 3
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    Computer and photogrammetric general land use study of central north Alabama (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The object of this report is to acquaint potential users with two computer programs, developed at NASA, Marshall Space Flight Center. They were used in producing a land use survey and maps of central north Alabama from Earth Resources Technology Satellite (ERTS) digital data. The report describes in detail the thought processes and analysis procedures used from the initiation of the land use study to its completion, as well as a photogrammetric study that was used in conjunction with the computer analysis to produce similar land use maps. The results of the land use demonstration indicate that, with respect to computer time and cost, such a study may be economically and realistically feasible on a statewide basis.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TR-R-431 , M-130
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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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
  • 5
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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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