Optimally isotropic Laplacian operator

Authors:
B. Kamgar-Parsi;A. Rosenfeld
Affiliations:
Inf. Technol. Div., Naval Res. Lab., Washington, DC;-
Venue:
IEEE Transactions on Image Processing
Year:
1999

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Abstract

Laplacian operators used in the literature for digital image processing are not rotationally invariant. We examine the anisotropy of 3×3 Laplacian operators for images quantized in square pixels, and find the operator which has the minimum overall anisotropy