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Built-in Mathematica Symbol

LaplacianGaussianFilter

LaplacianGaussianFilter[image, r]
convolves image with a Laplacian-of-Gaussian kernel of pixel radius r.

}]
convolves image with a Laplacian-of-Gaussian kernel of radius r and standard deviation

LaplacianGaussianFilter[data, ...]
applies Laplacian-of-Gaussian filtering to an array of data.

LaplacianGaussianFilter takes a Padding option. The default setting is Padding->"Fixed".

In LaplacianGaussianFilter[data, ...], data can be an array of any rank, and can contain symbolic as well as numerical entries.

Find edge features in a color image:

Laplacian of Gaussian applied to a grayscale image:

Find the edges of an object, showing the inside of the edge in darker tones and the outside in brighter tones.

Laplacian of Gaussian filter of a numeric array:

Find edge features in a color image:

Laplacian of Gaussian applied to a grayscale image:

Find the edges of an object, showing the inside of the edge in darker tones and the outside in brighter tones.

Laplacian of Gaussian filter of a numeric array:

Apply a LoG filter to the output of a distance transform: