Abstract: An apparatus for generating volumetric images viewable without 3D eyewear. The apparatus includes an image display assembly displaying a first image at a first display time and a second image at a second display time (e.g., a number of planar or 2D images on a display screen/surface). The apparatus includes a flexible two-way mirror element (a varifocal beamsplitter). During operations, the first and second images from the display assembly are directed toward and then reflected from the back side of the mirror element. The apparatus also includes a hoop-shaped frame supporting a peripheral edge of the mirror element. A driver shakes the frame to resonate the mirror element between convex and concave shapes while it is used for reflecting the first and second images. The apparatus also includes a concave mirror positioned relative to the mirror element to receive the reflected first and second images.

Abstract: The invention relates to method and an apparatus for depth cueing, i.e. improving the sense of depth in two-dimensional images of three-dimensional volume data, said 2D images being generated using volume rendering. The invention is characterized in that a second depth color chart generated from the original color chart by permuting at least two color channels is used in the depth dimension. Alternatively, all three color channels can be permuted.

Abstract: Exemplary methods are provided. In one exemplary method, a lower-dimension signature is generated for each of a plurality of data sets of a given dimension. Registration is performed on the lower-dimension signatures. In another exemplary method, a two-dimensional signature is generated for each of a plurality of three-dimensional volumes. Registration is performed on the two-dimensional signatures.