How Hessian feature detector works?

1. How does Harris corner detector work?
2. Is the Hessian detector scale invariant?
3. What is Hessian matrix in image processing?

How does Harris corner detector work?

The Harris corner detector works by taking horizontal and vertical derivatives of the image and looking for areas where both are high, this is quantified by the Harris corner descriptor which is defined in our case as the matrix �and the descriptor is .

Is the Hessian detector scale invariant?

Harris and Hessian detectors are rotation invariant. However, they are not scale-invariant, which is a crucial drawback in terms of feature detection.

What is Hessian matrix in image processing?

The Hessian matrix is commonly used for expressing image processing operators in image processing and computer vision (see the Laplacian of Gaussian (LoG) blob detector, the determinant of Hessian (DoH) blob detector and scale space).