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7 December 1981 Temporally Adaptive Hybrid Optical/Digital Interframe Compression Scheme
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The feasibility of optical processing for interframe image compression has been demon-strated by hybrid optical/digital IDPCM/Frame-to-Frame DPCM interframe compression architecture and its simulation [1]. However, the subjective image quality of the reconstructed 14th frame for 1.5 bits/pixel or 1.75 bits/pixel are not excellent enough to meet a broadcasting standard. Also, the transmission rate performances per second with the frame rate: 30 frames/sec and 256 x 256 lines of the images are 2.9 14bits/sec or 3.4 Abits/sec, resoectively, which are not quite competitive against the 1.5 lbits/sec monochrome videoteleohone system performance [2]. In this oa7Der, in order to improve the hybrid system performance, another hybrid optical/digital adaptive IDPCWconditional re plenishment interframe compression architecture is proposed and simulated. As a result of simulating 14 sequences of Walter Cronkite images with 256 x 25, lines and 6 bit intensity, reconstructed images with an excellent image quality are obtained with 1.2 libits/sec for the frame rate 30 frames/sec, and the average compres-sion ratio performance is 18.13, and the average bit rate is 0.67 bits/pixel.
© (1981) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
H. N. Ito and B. R. Hunt "Temporally Adaptive Hybrid Optical/Digital Interframe Compression Scheme", Proc. SPIE 0292, Processing of Images and Data from Optical Sensors, (7 December 1981);

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