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dc.contributor.authorCree, Michael J.en_NZ
dc.coverage.spatialAuckland, New Zealanden_NZ
dc.date.accessioned2019-03-26T23:27:20Z
dc.date.available2018en_NZ
dc.date.available2019-03-26T23:27:20Z
dc.date.issued2018en_NZ
dc.identifier.citationCree, M. J. (2018). An exploration of using the intel AVX2 gather load instructions for vectorised image processing. Presented at the International Conference on Image and Vision Computing New Zealand (IVCNZ), Auckland, New Zealand: IEEE. https://doi.org/10.1109/IVCNZ.2018.8634707en
dc.identifier.urihttps://hdl.handle.net/10289/12429
dc.description.abstractProcessing image data with single-instruction multiple-data (SIMD) CPU instructions provides a means of vectorising, thus speeding up execution, of standard image processing operators. SIMD register loads normally load from consecutive locations in memory, that is, consecutive pixels in a row of the image. For some algorithms, however, data dependencies between pixels along rows render SIMD vectorisation useless. If one could efficiently load pixels from columns of images this problem would be fixed. The Intel AVX2 CPU extension introduces an instruction for the gather loading of data from multiple memory locations into a single CPU SIMD register. We explore using these instructions for column loads of image data in two common image operations, transposing images and mean filtering, to test 1) whether they provide useful speed-ups when other vectorised approaches exist (and find that they do not), and 2) whether they provide means of implementing operations that otherwise would be difficult or extremely inefficient to achieve without a column load (they can provide speed-ups over scalar code).
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherIEEEen_NZ
dc.rightsThis is an author’s accepted version of an article published in the Proceedings of International Conference on Image and Vision Computing New Zealand (IVCNZ). © 2018 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
dc.sourceInternational Conference on Image and Vision Computing New Zealand (IVCNZ)en_NZ
dc.subjectSIMD
dc.subjectvectorisation
dc.subjectimage processing
dc.titleAn exploration of using the intel AVX2 gather load instructions for vectorised image processingen_NZ
dc.typeConference Contribution
dc.identifier.doi10.1109/IVCNZ.2018.8634707en_NZ
pubs.elements-id235909
pubs.finish-date2019-12-21en_NZ
pubs.start-date2018-12-19en_NZ


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