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Edge and line detection in ERTS imagery: A comparative studySeveral local edge detection operators were applied to a set of ERTS pictures of the Monterey, Calif. area. Gradient operators performed consistently better than laplacian operators in detecting edges. It was also found that if a grayscale normalization operation, histogram flattening, was applied to the pictures first, the edge detector outputs were greatly enhanced. The use of interpolation for more accurate location of edges on a digital picture was also briefly investigated. Curve detection operators were applied to the edge detector outputs; this had the effect of enhancing the edges while suppressing noise.
Document ID
19740021612
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Eberlein, R.
(Maryland Univ. College Park, MD, United States)
Vanderbrug, G. J.
(Maryland Univ. College Park, MD, United States)
Rosenfeld, A.
(Maryland Univ. College Park, MD, United States)
Davis, L. S.
(Maryland Univ. College Park, MD, United States)
Date Acquired
September 3, 2013
Publication Date
June 1, 1974
Subject Category
Geophysics
Report/Patent Number
TR-312
NASA-CR-138963
Accession Number
74N29725
Funding Number(s)
CONTRACT_GRANT: NGR-21-002-351
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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