Patent ID: 8587852

Claim:
A computer generation device for generating hologram pattern information for producing on a hologram display surface a holographic image of a 3D object, the generation device comprising: a selector for acquiring object information and for selecting a first cross-section range comprising a plurality of cross sections into which image data of the 3D object is divided and which are parallel to the hologram display surface, and at least one additional cross section range, each additional cross section range overlapping a preceding cross section range along a line of perspective from a previously determined observation point on the hologram display surface; depth integrating component for calculating, for each of a plurality of lattice points in a coordinate system provided in a selected cross section range, a depth integral function acquired by integrating an inverse diffraction function used for determining points for displaying the image of the 3D object, with respect to respective lattice points in the at least one additional cross section range, the respective lattice points overlapping a preceding lattice point along a line of perspective from the previously determined observation point; and inverse Fourier transform component for generating the hologram pattern by performing a two-dimensional inverse Fourier transform on the depth integral functions for the plurality of lattice points in the selected cross section range, said hologram pattern being and displaying the holographic image on the hologram display surface using the generated hologram pattern.