LAUSR.org creates dashboard-style pages of related content for over 1.5 million academic articles. Sign Up to like articles & get recommendations!

Learning dictionary in the approximately flattened structure domain

Photo by lukechesser from unsplash

Abstract Dictionary learning provides an adaptive way to optimally represent a given dataset. In dictionary learning, the basis function is adapted according to the given data instead of being fixed… Click to show full abstract

Abstract Dictionary learning provides an adaptive way to optimally represent a given dataset. In dictionary learning, the basis function is adapted according to the given data instead of being fixed in many analytical sparse transforms. The application of the dictionary learning techniques in seismic data processing has been popular in the past decade. However, most dictionary learning algorithms are directly taken from the image processing community and thus are not suitable for seismic data. Considering that the seismic data is spatially coherent, the dictionary should better be learned according to the coherency information in the seismic data. We found the dictionary learning performs better when the spatial correlation is stronger and thus we propose an approximately flattening operator to help learn the dictionary in an approximately flattened structure domain, where the strong spatial coherence helps construct a dictionary that follows better the structural pattern inof the seismic data. The presented dictionary learning in the approximately flattened structure domain (DLAF) thus has a stronger capability in separating signal and noise. We use both synthetic and field data examples to demonstrate the superb performance of the proposed method.

Keywords: flattened structure; dictionary learning; seismic data; approximately flattened; structure domain

Journal Title: Journal of Applied Geophysics
Year Published: 2018

Link to full text (if available)


Share on Social Media:                               Sign Up to like & get
recommendations!

Related content

More Information              News              Social Media              Video              Recommended



                Click one of the above tabs to view related content.