Software implementation of an efficient image subband coder

John Hakon Husoy; Frode Moretro

doi:10.1117/12.58308

19 May 1992 Software implementation of an efficient image subband coder

John Hakon Husoy, Frode Moretro

Proceedings Volume 1657, Image Processing Algorithms and Techniques III; (1992) https://doi.org/10.1117/12.58308
Event: SPIE/IS&T 1992 Symposium on Electronic Imaging: Science and Technology, 1992, San Jose, CA, United States

Abstract

After a short review of IIR-based subband coders, we describe the features of a software implementation of an efficient image subband coder (SBC). The efficiency of an SBC is heavily dependent upon the filter bank implementation. Experience has shown that at least 90% of the execution time of SBCs is spent in the filter bank. First, we present our implementation based on extremely simple multiplier-free IIR filters. Subsequently, we discuss the implementation task from a programmer's point of view, emphasizing the algorithm implementation using only integer arithmetic. The experiments show that our IIR SBC's execution time is ten times faster than that of an efficient SBC based on FIR filter banks. Furthermore, our codes is twice as fast as the July 91 release of the Free Software Foundation's JPEG implementation, while maintaining comparable performance; our SBC- coded images had somewhat higher signal to noise ratio than those coded with JPEG at the same bit rate. The subjective quality was found to be comparable.

Citation Download Citation

John Hakon Husoy and Frode Moretro "Software implementation of an efficient image subband coder", Proc. SPIE 1657, Image Processing Algorithms and Techniques III, (19 May 1992); https://doi.org/10.1117/12.58308

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