Method and apparatus for compressing hologram

An apparatus for compressing a hologram, the apparatus comprising:

• a memory configured to store one or more instructions;
• and
• one or more processors configured to execute the one or more instructions stored in the memory,
• wherein the one or more processors, by executing the one or more instructions, perform steps comprising:
• generating a plurality of phase wavefront blocks by using a certain frame of a phase-only hologram;
• generating a Zernike coefficient block from a phase wavefront block among the plurality of phase wavefront blocks;
• generating a first prediction wavefront block by using the phase wavefront block and the Zernike coefficient block;
• generating a differential wavefront block by using the phase wavefront block and the first prediction wavefront block;
• transforming and quantizing the differential wavefront block;
• generating a restored differential wavefront block by inversely quantizing and inversely transforming the differential wavefront block which is transformed and quantized;
• generating a restored phase wavefront block by using the restored differential wavefront block;
• generating a restored phase wavefront by using a plurality of restored phase wavefront blocks which are generated by using the restored differential wavefront blocks;
• and
• restoring the phase-only hologram by using the restored phase wavefront.