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Cross-Scale Predictive Dictionaries.

Publication ,  Journal Article
Saragadam, V; Li, X; Sankaranarayanan, AC
Published in: IEEE transactions on image processing : a publication of the IEEE Signal Processing Society
February 2019

Sparse representations using data dictionaries provide an efficient model particularly for signals that do not enjoy alternate analytic sparsifying transformations. However, solving inverse problems with sparsifying dictionaries can be computationally expensive, especially when the dictionary under consideration has a large number of atoms. In this paper, we incorporate additional structure on to dictionary-based sparse representations for visual signals to enable speedups when solving sparse approximation problems. The specific structure that we endow onto sparse models is that of a multi-scale modeling where the sparse representation at each scale is constrained by the sparse representation at coarser scales. We show that this cross-scale predictive model delivers significant speedups, often in the range of , with little loss in accuracy for linear inverse problems associated with images, videos, and light fields.

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Published In

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society

DOI

EISSN

1941-0042

ISSN

1057-7149

Publication Date

February 2019

Volume

28

Issue

2

Start / End Page

803 / 814

Related Subject Headings

  • Artificial Intelligence & Image Processing
  • 4607 Graphics, augmented reality and games
  • 4603 Computer vision and multimedia computation
  • 1702 Cognitive Sciences
  • 0906 Electrical and Electronic Engineering
  • 0801 Artificial Intelligence and Image Processing
 

Citation

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Saragadam, V., Li, X., & Sankaranarayanan, A. C. (2019). Cross-Scale Predictive Dictionaries. IEEE Transactions on Image Processing : A Publication of the IEEE Signal Processing Society, 28(2), 803–814. https://doi.org/10.1109/tip.2018.2869719
Saragadam, Vishwanath, Xin Li, and Aswin C. Sankaranarayanan. “Cross-Scale Predictive Dictionaries.IEEE Transactions on Image Processing : A Publication of the IEEE Signal Processing Society 28, no. 2 (February 2019): 803–14. https://doi.org/10.1109/tip.2018.2869719.
Saragadam V, Li X, Sankaranarayanan AC. Cross-Scale Predictive Dictionaries. IEEE transactions on image processing : a publication of the IEEE Signal Processing Society. 2019 Feb;28(2):803–14.
Saragadam, Vishwanath, et al. “Cross-Scale Predictive Dictionaries.IEEE Transactions on Image Processing : A Publication of the IEEE Signal Processing Society, vol. 28, no. 2, Feb. 2019, pp. 803–14. Epmc, doi:10.1109/tip.2018.2869719.
Saragadam V, Li X, Sankaranarayanan AC. Cross-Scale Predictive Dictionaries. IEEE transactions on image processing : a publication of the IEEE Signal Processing Society. 2019 Feb;28(2):803–814.

Published In

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society

DOI

EISSN

1941-0042

ISSN

1057-7149

Publication Date

February 2019

Volume

28

Issue

2

Start / End Page

803 / 814

Related Subject Headings

  • Artificial Intelligence & Image Processing
  • 4607 Graphics, augmented reality and games
  • 4603 Computer vision and multimedia computation
  • 1702 Cognitive Sciences
  • 0906 Electrical and Electronic Engineering
  • 0801 Artificial Intelligence and Image Processing