  Quantum Image Processing is a recent highlight in the quantum computing
field. All previous methods for representing the images as quantum states were
defined using qubits. One Quantum Image Representation (QIR) method using
qutrits is present in the literature. Inspired by the qubit methods and the
higher state-space available for qutrits, multiple QIR methods using qutrits
are worked out in this paper. The ternary quantum gates required for the
representations are described, and then the implementation details for five
qutrit-based QIR methods are given. All the methods have been simulated in
software, and example circuits are provided.
