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  • COMPUTERS  (4)
  • EARTH RESOURCES AND REMOTE SENSING  (2)
  • 1
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    Study of a hybrid multispectral processor (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A hybrid processor is described offering enough handling capacity and speed to process efficiently the large quantities of multispectral data that can be gathered by scanner systems such as MSDS, SKYLAB, ERTS, and ERIM M-7. Combinations of general-purpose and special-purpose hybrid computers were examined to include both analog and digital types as well as all-digital configurations. The current trend toward lower costs for medium-scale digital circuitry suggests that the all-digital approach may offer the better solution within the time frame of the next few years. The study recommends and defines such a hybrid digital computing system in which both special-purpose and general-purpose digital computers would be employed. The tasks of recognizing surface objects would be performed in a parallel, pipeline digital system while the tasks of control and monitoring would be handled by a medium-scale minicomputer system. A program to design and construct a small, prototype, all-digital system has been started.
    Keywords: COMPUTERS
    Type: NASA-CR-133976 , ERIM-31650-154-T
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Application of computer processed multispectral data to the discrimination of land collapse (sinkhole) prone areas in Florida (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Data were collected near Bartow, Florida, for the purpose of studying land collapse phenomena using remote sensing techniques. Data obtained using the multispectral scanner system consisted of various combinations of 18 spectral bands ranging from 0.4-14.0 microns and several types of photography. The multispectral data were processed on a special-purpose analog computer in order to detect moisture-stressed vegetation and to enhance terrain surface temperatures. The processed results were printed on film to show the patterns of distribution of the proposed hydrogeologic indicators.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Intern. Symp. on Remote Sensing of Environ.; Oct 01, 1969|NASA John F. Kennedy Space Center Remote Sensing and the Earth; p 181-193
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    MIDAS prototype Multispectral Interactive Digital Analysis System for large area earth resources surveys. Volume 2: Charge coupled device investigation (1976)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: MIDAS is a third-generation, fast, low cost, multispectral recognition system able to keep pace with the large quantity and high rates of data acquisition from large regions with present and projected sensors. MIDAS, for example, can process a complete ERTS frame in forty seconds and provide a color map of sixteen constituent categories in a few minutes. A principal objective of the MIDAS Program is to provide a system well interfaced with the human operator and thus to obtain large overall reductions in turn-around time and significant gains in throughput. The need for advanced onboard spacecraft processing of remotely sensed data is stated and approaches to this problem are described which are feasible through the use of charge coupled devices. Tentative mechanizations for the required processing operations are given in large block form. These initial designs can serve as a guide to circuit/system designers.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-145166 , ERIM-108800-54-F
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    MIDAS, prototype Multivariate Interactive Digital Analysis System, phase 1. Volume 3: Wiring diagrams (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Midas System is a third-generation, fast, multispectral recognition system able to keep pace with the large quantity and high rates of data acquisition from present and projected sensors. A principal objective of the MIDAS Program is to provide a system well interfaced with the human operator and thus to obtain large overall reductions in turn-around time and significant gains in throughput. The hardware and software generated in Phase I of the overall program are described. The system contains a mini-computer to control the various high-speed processing elements in the data path and a classifier which implements an all-digital prototype multivariate-Gaussian maximum likelihood decision algorithm operating at 2 x 100,000 pixels/sec. Sufficient hardware was developed to perform signature extraction from computer-compatible tapes, compute classifier coefficients, control the classifier operation, and diagnose operation. The MIDAS construction and wiring diagrams are given.
    Keywords: COMPUTERS
    Type: NASA-CR-132465 , ERIM-195800-25-F-VOL-3
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Multivariate interactive digital analysis system /MIDAS/ - A new fast multispectral recognition system (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The MIDAS system is a prototype, multiple-pipeline digital processor mechanizing the multivariate-Gaussian, maximum-likelihood decision algorithm operating at 200,000 pixels/second. It incorporates displays and film printer equipment under control of a general purpose midi-computer and possesses sufficient flexibility that operational versions of the equipment may be subsequently specified as subsets of the system.
    Keywords: COMPUTERS
    Type: Conference on Machine processing of remotely sensed data; Oct 16, 1973 - Oct 18, 1973; West Lafayette, IN
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    MIDAS, prototype Multivariate Interactive Digital Analysis System, Phase 1. Volume 2: Diagnostic system (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The MIDAS System is a third-generation, fast, multispectral recognition system able to keep pace with the large quantity and high rates of data acquisition from present and projected sensors. A principal objective of the MIDAS Program is to provide a system well interfaced with the human operator and thus to obtain large overall reductions in turn-around time and significant gains in throughout. The hardware and software generated in Phase I of the over-all program are described. The system contains a mini-computer to control the various high-speed processing elements in the data path and a classifier which implements an all-digital prototype multivariate-Gaussian maximum likelihood decision algorithm operating 2 x 105 pixels/sec. Sufficient hardware was developed to perform signature extraction from computer-compatible tapes, compute classifier coefficients, control the classifier operation, and diagnose operation. Diagnostic programs used to test MIDAS' operations are presented.
    Keywords: COMPUTERS
    Type: NASA-CR-132464 , ERIM-195800-25-F-VOL-2
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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