1. A computer implemented method for generating an accurate model in three dimensions (3D) of internal and external and external anatomical features, comprising: collecting simultaneous images of a body segment using a plurality of imaging devices; calibrating the model by using a computer processor to process the simultaneous images from the plurality of imaging devices, wherein the plurality of imaging devices comprises an infrared imager, a range imager, and a visual imager, and the calibration step further comprises: performing intrinsic calibration of each imager to compute its intrinsic correction transform for lens aberrations, radial distortion, detector array nonregularities, and other biases in its output image; performing extrinsic calibrations of a selected two of the imagers, the selected imagers each having a lower (x,y,) sample density than any non-selected imager, said extrinsic calibration obtaining an extrinsic overlay transform for each respective selected imager; combining corrected and overlaid images of the infrared camera and the range imager to produce a 3D infrared model with a body-centric coordinate system; processing the range image to extract a curvilinear feature map of external anatomy; processing the infrared image to extract a curvilinear feature map of internal anatomy; skeletonizing the respective curvilinear feature maps; producing skeleton node maps containing intersection and branch locations of said curvilinear features; labeling each node according to a standard directory description of intersecting or branching anatomical features; forming a layered composite image of the infrared, range, and visual images, plus their feature maps, plus their skeletonized feature maps, plus their node maps; selecting nodes corresponding to three reference points designated for said body segment; rotating the composite image in three-dimensional space such that the three reference points define a two dimensional (2D) image plane, said 2D image plane being a standard pose for said body segment; storing said rotated standardized composite image as a labeled facet of a total 3D body map; repeating said further calibration steps for additional body segments.