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Edge and line detection in ERTS imagery: A comparative study (1974)

Rosenfeld, A. ; Vanderbrug, G. J. ; Eberlein, R. ; [et al.]

In: CASI

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Publication Date: 2019-06-27

Description: Several 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.

Keywords: GEOPHYSICS

Type: NASA-CR-138963 , TR-312

Format: application/pdf

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