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  • 1980-1984  (5)
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  • 1
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    Segmentation of remotely sensed data using parallel region growing (1983)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The improved spatial resolution of the new earth resources satellites will increase the need for effective utilization of spatial information in machine processing of remotely sensed data. One promising technique is scene segmentation by region growing. Region growing can use spatial information in two ways: only spatially adjacent regions merge together, and merging criteria can be based on region-wide spatial features. A simple region growing approach is described in which the similarity criterion is based on region mean and variance (a simple spatial feature). An effective way to implement region growing for remote sensing is as an iterative parallel process on a large parallel processor. A straightforward parallel pixel-based implementation of the algorithm is explored and its efficiency is compared with sequential pixel-based, sequential region-based, and parallel region-based implementations. Experimental results from on aircraft scanner data set are presented, as is a discussioon of proposed improvements to the segmentation algorithm.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Texture functions in image analysis: A computationally efficient solution (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A computationally efficient means for calculating texture measurements from digital images by use of the co-occurrence technique is presented. The calculation of the statistical descriptors of image texture and a solution that circumvents the need for calculating and storing a co-occurrence matrix are discussed. The results show that existing efficient algorithms for calculating sums, sums of squares, and cross products can be used to compute complex co-occurrence relationships directly from the digital image input.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-85022 , NAS 1.15:85022
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    The Multispectral Imaging Science Working Group. Volume 3: Appendices (1982)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: The status and technology requirements for using multispectral sensor imagery in geographic, hydrologic, and geologic applications are examined. Critical issues in image and information science are identified.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E83-10351 , NASA-CP-2260-VOL-3 , NAS 1.55:2260-VOL-3 , Proc. of working groups; Jan 01, 1982; Pasadena, CA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    The Multispectral Imaging Science Working Group. Volume 2: Working group reports (1982)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Summaries of the various multispectral imaging science working groups are presented. Current knowledge of the spectral and spatial characteristics of the Earth's surface is outlined and the present and future capabilities of multispectral imaging systems are discussed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E85-10002 , NASA-CP-2260-VOL-2 , NAS 1.55:2260-VOL-2 , Sep 01, 1982; Pasadena, CA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    The Multispectral Imaging Science Working Group. Volume 1: Executive summary (1982)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Results of the deliberations of the six multispectral imaging science working groups (Botany, Geography, Geology, Hydrology, Imaging Science and Information Science) are summarized. Consideration was given to documenting the current state of knowledge in terrestrial remote sensing without the constraints of preconceived concepts such as possible band widths, number of bands, and radiometric or spatial resolutions of present or future systems. The findings of each working group included a discussion of desired capabilities and critical developmental issues.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E85-10001 , NASA-CP-2260-VOL-1 , NAS 1.55:2260-VOL-1 , Sep 01, 1982; Pasadena, CA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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