(physics) A unitary transformation of the orthonormal basis in which both the Hamiltonian and the state are represented; it has applications in high-energy physics.

plural of white top-hat transform

(mathematics, signal processing) A form of the top-hat transform that finds the elements in the input image that are darker than their surroundings.

plural of black top-hat transform

(mathematics, signal processing) A form of the top-hat transform that finds the elements in the input image that are brighter than their surroundings.