The animations allowed the doctors to better understand the relationship between morphological changes and the patient's subjective judgements. Previous methods of implementation required a tremendous amount of manual intervention. The immediate goal of the current work has been to automate and accelerate this process. The Perceptometer operates in two modes. The first is a setup mode used by the clinician to design animations and automate tests that will be taken by the patient.
Setup begins by displaying a bit-mapped image of the subject in profile.
Using the left and right mouse buttons, the clinician adds new, intermediate points on the white line and repositions them along the subject's profile. The clinician can then define the features that will be morphed. The clinician selects a contiguous region of vertices and labels them according to the body part they adjoin. Upon completion of the normal profile definition, the clinician synchronizes the other lines to the normal profile line. This makes all the lines momentarily identical.