Abstract:

True 3D volumetric display is the latest volume data display whose image floats in real 3D space and can offer people both physiological and psychological depth cues. Hardware structure and display principals of true 3D volumetric display based on multiprojector and rotating flat screen were analyzed to acquire true 3D volumetric display data. An approach to acquire true 3D volumetric display data by obtaining slice images of a model using OpenGL was proposed. Positions of two clip planes were first calculated, and then view volume was restrained by enabling two clip planes to cut a model and obtain its image slices. Finally, image slices from different perspective were obtained by controlling positions of a model according to the preset rotating angle. Then, software using the above method was developed to acquire true 3D volumetric display data. The application example of cutting an animal model indicates the method was effective.

Key words:  true 3D, volumetric display, rotating flat screen, multi-projector, image data