dc.creator | Ribeiro, Flávio Protásio | |
dc.creator | Nascimento, Vitor Heloiz | |
dc.date.accessioned | 2012-10-19T01:46:17Z | |
dc.date.accessioned | 2018-07-04T14:51:32Z | |
dc.date.available | 2012-10-19T01:46:17Z | |
dc.date.available | 2018-07-04T14:51:32Z | |
dc.date.created | 2012-10-19T01:46:17Z | |
dc.date.issued | 2011 | |
dc.identifier | IEEE TRANSACTIONS ON IMAGE PROCESSING, v.20, n.8, p.2241-2247, 2011 | |
dc.identifier | 1057-7149 | |
dc.identifier | http://producao.usp.br/handle/BDPI/18628 | |
dc.identifier | 10.1109/TIP.2011.2118219 | |
dc.identifier | http://dx.doi.org/10.1109/TIP.2011.2118219 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1615420 | |
dc.description.abstract | In Part I [""Fast Transforms for Acoustic Imaging-Part I: Theory,"" IEEE TRANSACTIONS ON IMAGE PROCESSING], we introduced the Kronecker array transform (KAT), a fast transform for imaging with separable arrays. Given a source distribution, the KAT produces the spectral matrix which would be measured by a separable sensor array. In Part II, we establish connections between the KAT, beamforming and 2-D convolutions, and show how these results can be used to accelerate classical and state of the art array imaging algorithms. We also propose using the KAT to accelerate general purpose regularized least-squares solvers. Using this approach, we avoid ill-conditioned deconvolution steps and obtain more accurate reconstructions than previously possible, while maintaining low computational costs. We also show how the KAT performs when imaging near-field source distributions, and illustrate the trade-off between accuracy and computational complexity. Finally, we show that separable designs can deliver accuracy competitive with multi-arm logarithmic spiral geometries, while having the computational advantages of the KAT. | |
dc.language | eng | |
dc.publisher | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | |
dc.relation | Ieee Transactions on Image Processing | |
dc.rights | Copyright IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | |
dc.rights | restrictedAccess | |
dc.subject | Acoustic imaging | |
dc.subject | array imaging | |
dc.subject | array processing | |
dc.subject | fast transform | |
dc.subject | regularized least-squares | |
dc.subject | sparse reconstruction | |
dc.title | Fast Transforms for Acoustic Imaging-Part II: Applications | |
dc.type | Artículos de revistas | |