1. A method for processing image data, comprising: performing a motion estimation process to obtain a motion vector that is descriptive for motion from a previous to a subsequent image of an input image sequence; determining fidelity information for said motion vector, said fidelity information being descriptive for a level and accuracy of said motion estimation process; projecting said motion vector to an interpolation position corresponding to an interpolated image that lies between said previous and subsequent image to obtain a projected motion vector; projecting said fidelity information to said interpolation position to obtain projected fidelity information; determining classification information for said projected motion vector, said classification information depending on said projected fidelity information, said classification information being descriptive for a motion type of said motion; and selecting an interpolation method in dependence of the determined classification information.