Greedy Sparse RLS. - Bogdan Dumitrescu; Alexandru Onose; Petri Helin; Ioan Tabus (IEEE Trans. Signal Process., 2012)

Likelihood based combining of subband estimates for wideband DOA. - Petri Helin; Bogdan Dumitrescu; Jaakko Astola; Ioan Tabus (ISPA, 2013)

Super resolution inverse imaging for plenoptic camera using wavefield modeling. - Petri Helin; Vladimir Katkovnik; Atanas P. Gotchev; Jaakko Astola (3DTV-Conference, 2014)

Sparse modelling and predictive coding of subaperture images for lossless plenoptic image compression. - Petri Helin; Pekka Astola; Bhaskar Rao 001; Ioan Tabus (3DTV-Conference, 2016)

Precise outline matching criteria for target pose estimation and odometry from stereo video. - Pekka Astola; Petri Helin; Mohammad M. Aref; Jouni Mattila; Jaakko Astola; Ioan Tabus (TSP, 2016)

Microlens image sparse modelling for lossless compression of plenoptic camera sensor images. - Ioan Tabus; Petri Helin (EUSIPCO, 2017)

Lossy compression of lenslet images from plenoptic cameras combining sparse predictive coding and JPEG 2000. - Ioan Tabus; Petri Helin; Pekka Astola (ICIP, 2017)

Minimum Description Length Sparse Modeling and Region Merging for Lossless Plenoptic Image Compression. - Petri Helin; Pekka Astola; Bhaskar Rao 001; Ioan Tabus (IEEE J. Sel. Top. Signal Process., 2017)