In close relation the technological means employed must also be considered. If these do not fulfil some basic requirements they can be part of the problem, generating errors and/or introducing more uncertainty. In contrast, they can provide an invaluable support when they incorporate, together with those requirements, some desirable features that help to reduce errors, uncertainty and the time employed. While the requirements list is intended to be a complete list of features that all the equipment have to fulfil, the desirable features should be considered an open list that can increase in line with the new research advances in the field.
|TOOLS FOR COMPUTER-AIDED CRANIOFACIAL SUPERIMPOSITION (3D SKULL MODEL-2D FACE IMAGE)|
|Type / name||Requirements||Desirable features|
|3D scanner or CT scanner||Precision ≤ 1mm||Capture of texture information|
|Software for landmark location||Tool to locate landmarks in a single pixel||Tool to locate landmarks in a region|
|Software for performing the skull-face overlay||Show landmarksTransparency modeTools to rotate, translate and scale the 3D skullTool to properly Project 3D skull on 2D||Wipe modeSimultaneous interaction with 3D skull and the AM photograph|
|Software for assessing the skull-face relationship||Transparency mode||Show landmarks and contoursWipe modeTool for measuring Euclidean and Surface distances between points or perimetersTool for marking line sor contours|
Tabla 1. Requirements and desirable features for a computer-assisted superimposition (3D skull model-2D face image).