Laplacian mask in image processing

1. What is Laplacian mask in image processing?
2. What is Laplacian filter mask used for?
3. Which of the following is Laplacian mask?

What is Laplacian mask in image processing?

Laplacian filter. The Laplacian of an image highlights regions of rapid intensity change and is an example of a second order or a second derivative method of enhancement [31]. It is particularly good at finding the fine details of an image. Any feature with a sharp discontinuity will be enhanced by a Laplacian operator ...

What is Laplacian filter mask used for?

A Laplacian filter is an edge detector used to compute the second derivatives of an image, measuring the rate at which the first derivatives change. This determines if a change in adjacent pixel values is from an edge or continuous progression.

Which of the following is Laplacian mask?

Laplacian Operator is also a derivative operator which is used to find edges in an image. The major difference between Laplacian and other operators like Prewitt, Sobel, Robinson and Kirsch is that these all are first order derivative masks but Laplacian is a second order derivative mask.