Method and system for correcting image data

A method of correcting image data, the method comprises obtaining at least one 3D thermospatial representation having 3D spatial data representing a non-planar surface of a portion of a living body and thermal data associated with the 3D spatial data; based on the spatial data, calculating a viewing angle for each of a plurality of picture-elements over the thermospatial representation; and for each of at least some of the picture-elements, applying a predetermined correction function which describes a dependence of a correction of the thermal data on the viewing angle, for correcting thermal data associated with the picture-element.