To acquire and display a real-time (run-time) three-dimensional object or image.

A color 3D image input device (digitizer) and a 3D image output device (display) capture and show 3D images having the light fields. Positions, angles, directions, phases and colors of the light fields are controlled by various methods such as liquid crystal masks with photo-sensors, liquid crystal masks with patterns. Alternatively, micro-lens-array, micro-pinholes, liquid crystal pinholes, varifocal micro-lens arrays and varifocal index-gradient lens, etc., are used together with high-resolution and high-speed pattern generating means with photo-sensors and photo-emitters. This can be used for 3D communication, 3DTV, 3D camera cloaking devices.