LOSSY COMPRESSIVE SENSING BASED ON ONLINE DICTIONARY LEARNING

Ulku İ., Kizgut E.

COMPUTING AND INFORMATICS, cilt.38, sa.1, ss.151-172, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 38 Sayı: 1
  • Basım Tarihi: 2019
  • Doi Numarası: 10.31577/cai_2019_1_151
  • Dergi Adı: COMPUTING AND INFORMATICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.151-172
  • Anahtar Kelimeler: Hyperspectral imaging, compression algorithms, dictionary learning, sparse coding, HYPERSPECTRAL IMAGE COMPRESSION, SPARSE REPRESENTATIONS, LOSSLESS COMPRESSION, SIGNAL RECOVERY
  • Ankara Üniversitesi Adresli: Hayır

Özet

In this paper, a lossy compression of hyperspectral images is realized by using a novel online dictionary learning method in which three dimensional datasets can be compressed. This online dictionary learning method and blind compressive sensing (BCS) algorithm are combined in a hybrid lossy compression framework for the first time in the literature. According to the experimental results, BCS algorithm has the best compression performance when the compression bit rate is higher than or equal to 0.5 bps. Apart from observing rate-distortion performance, anomaly detection performance is also tested on the reconstructed images to measure the information preservation performance.