Abstract: Video image data is received in the form of a sequence of images representative of a subject performing one or more predetermined tasks within a new environment (FIG. 3 element 31). A plurality of silhouettes is generated from the video image data and combined to provide a motion portrait (FIG. 6). Motion characteristics are then calculated based on the motion portrait and may be compared with normal or previous motion characteristics as part of diagnostic analysis (38).

Abstract: Video image data is received in the form of a sequence of images representative of a subject performing one or more predetermined tasks within a new environment (FIG. 3 element 31). A plurality of silhouettes is generated from the video image data and combined to provide a motion portrait (FIG. 6). Motion characteristics are then calculated based on the motion portrait and may be compared with normal or previous motion characteristics as part of diagnostic analysis (38).

Abstract: Patient pre-screening is facilitated through a system of hierarchically linked catalogues, each comprising at least one condition-descriptive entry. The hierarchy of linked catalogues is essentially tree structure in which the content of the lower-level catalogues is dependent upon particular entries in upper-level catalogues. In one embodiment, the uppermost catalogue comprises a model display of a male or female. In general, a condition-descriptive entry from an uppermost catalogue is selected. The selected condition-descriptive entry from the uppermost catalogue determines at least one lower-level catalogue that is subsequently displayed By traversing the linked catalogues in this manner, a concise diagnosis or symptom description may be quickly and accurately generated. In one embodiment of the present invention, diagnoses arrived at through the hierarchical structure include an ICS-9 code, thereby facilitating implementations of databases.