Optimization model for memory bandwidth usage in X-ray image enhancement

A.H.R. Albers, E. Suijs, P.H.N. With, de

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

4 Citations (Scopus)
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In Cardiovascular minimal invasive interventions, physicians require low-latency X-ray imaging applications, as their actions must be directly visible on the screen. The image-processing system should enable the simultaneous execution of a plurality of functions. Because dedicated hardware lacks flexibility, there is a growing interest in using off-the-shelf computer technology. Because memory bandwidth is a scarce parameter, we will focus on optimization methods for bandwidth reduction within multiprocessor systems at the chip level. We create a practical realistic model of required compute and memory bandwidth for a given set of image-processing functions. Similar modeling is applied for the available system resources. We concentrate in particular on X-ray image processing based on multi-resolution decomposition, noise reduction and image-enhancement techniques. We derive formulas for which we can optimize the mapping of the application onto processors, cache and memory for different configurations. The data-block granularity is matched to the memory hierarchy, so that caching will be optimized for low latency. More specifically, we exploit the locality of the signal-processing functions to streamline the memory communication. A substantial performance improvement is realized by a new memorycommunication model that incorporates the data dependencies of the image-processing functions. Results show a memory-bandwidth reduction in the order of 60% and a latency reduction in the order of 30-60% compared to straightforward implementations
Original languageEnglish
Title of host publicationReal-time image processing 2008 : 28 - 29 January 2008, San Jose, California, USA ; proceedings of Electronic imaging, science and technology
EditorsNasser Kehtarnavaz, Matthias F. Carlsohn
Place of PublicationBellingham
Number of pages12
ISBN (Print)978-0-8194-6983-0
Publication statusPublished - 2008

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X


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