Translator Disclaimer
13 December 1976 Adaptive, Hybrid, And Multi-Threshold CAQ Algorithms
Author Affiliations +
Three modifications of the Constant Area Quantization (CAQ) image bandwidth compression technique have been developed and tested in order to broaden the range of compression ratios obtainable with acceptable image quality. The first modification involved the introduction of an adaptive area threshold, the second was a two-threshold algorithm and the third was a hybrid of the CAQ with a Hadamard transform technique. Using these three algorithms together with the basic CAQ, images spanning the range from 0. 2 to 2 bits per picture element were obtained from an 8 bit original.
© (1976) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. J. Pearson and R. M. Simonds "Adaptive, Hybrid, And Multi-Threshold CAQ Algorithms", Proc. SPIE 0087, Advances in Image Transmission Techniques, (13 December 1976);

Back to Top