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A method for fast and low bit-rate compression of digital holograms based on a new vector quantization(VQ) method known as the skip-dimension VQ(SDVQ) is proposed.Briefly,a complex hologram is converted into a real off-axis hologram,and partitioned into a set of image vectors.The image vectors are passed into a graphic processing unit(GPU),and compressed through SDVQ into a set of code indices considerably smaller in data size than the source hologram.Experimental evaluation reveals that our scheme is capable of compressing a digital hologram to a compression ratio of over 500 times,in approximately 20-22 ms.
A method for fast and low bit-rate compression of digital holograms based on a new vector quantization (VQ) method known as the skip-dimension VQ (SDVQ) is proposed.Briefly, a complex hologram is converted into a real off-axis hologram , and partitioned into a set of image vectors. The image vectors are passed into a graphic processing unit (GPU), and compressed through SDVQ into a set of code indices due smaller in data size than the source hologram. Experimental evaluation reveals that our scheme is capable of compressing a digital hologram to a compression ratio of over 500 times, in approximately 20-22 ms.