Handbook of Image and Video Processing, 2nd Edition

4.13

Gradient and Laplacian Edge Detection

Phillip A. Mlsna,     Northern Arizona University, Flagstaff

Jeffrey J. Rodríguez,     University of Arizona, Tucson

1 Introduction.

2 Gradient-based Methods.

2.1 Continuous Gradient

2.2 Discrete Gradient Operators

3 Laplacian-based Methods.

3.1 Continuous Laplacian

3.2 Discrete Laplacian Operators

3.3 The Laplacian of Gaussian (Marr-Hildreth Operator)

3.4 Difference of Gaussian

4 Canny’s Method.

5 Approaches for Color and Multispectral Images.

6 Summary.

References.

1 Introduction

One of the most fundamental image analysis operations is edge detection. Edges are often vital clues toward the analysis and interpretation of image information, both in biological vision and computer image analysis. ...