Essays about: "l1 minimization"

Found 5 essays containing the words l1 minimization.

  1. 1. New Variants of Nonnegative Matrix Factorization with Application to Speech Coding and Speech Enhancement

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Pedro Jafeth Villasana Tinajero; [2019]
    Keywords : ;

    Abstract : In this thesis, new variants of nonnegative matrix factorization (NMF) based ona convolutional data model, -divergence and sparsication are developed andanalyzed. These NMF variants are collectively referred to as -CNMF. Commonsparsication techniques such as L1-norm minimization and elastic net arediscussed and a new regularizer is proposed. READ MORE

  3. 2. Compressed sensing for error correction on real-valued vectors

    University essay from Linnéuniversitetet/Institutionen för matematik (MA)

    Author : Pontus Tordsson; [2019]
    Keywords : compressed sensing; error correction; sparse vector; L0-minimization; L1-minimization;

    Abstract : Compressed sensing (CS) is a relatively new branch of mathematics with very interesting applications in signal processing, statistics and computer science. This thesis presents some theory of compressed sensing, which allows us to recover (high-dimensional) sparse vectors from (low-dimensional) compressed measurements by solving the L1-minimization problem. READ MORE

  4. 3. A Novel Shoeprint Enhancement method for Forensic Evidence Using Sparse Representation method.

    University essay from Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

    Author : Harshitha Reddy Katireddy; Sreemanth Sidda; [2017]
    Keywords : ;

    Abstract : Shoeprints are often recovered at crime scenes and are the most abundant form of evidence at a crime scene, and in some cases, it is proved to be as accurate as fingerprints. The basis for shoeprint impression evidence is determining the source of a shoeprint impression recovered from a crime scene. READ MORE

  5. 4. Solving Sudoku by Sparse Signal Processing

    University essay from KTH/Signalbehandling

    Author : MUHAMMAD MOHSIN ABBASI; [2015]
    Keywords : ;

    Abstract : Sudoku is a discrete constraints satisfaction problem which is modeled as an underdetermined linear system. This report focuses on applying some new signal processing approaches to solve sudoku and comparisons to some of the existing approaches are implemented. READ MORE

  6. 5. Compressed Sensing for 3D Laser Radar

    University essay from Linköpings universitet/Datorseende; Linköpings universitet/Tekniska högskolan

    Author : Erik Fall; [2014]
    Keywords : compressed sensing; compressed sampling; TCSPC; TV minimization; l1 minimization; DMD;

    Abstract : High resolution 3D images are of high interest in military operations, where data can be used to classify and identify targets. The Swedish defence research agency (FOI) is interested in the latest research and technologies in this area. A draw- back with normal 3D-laser systems are the lack of high resolution for long range measurements. READ MORE