Essays about: "wavelet representation"

Showing result 1 - 5 of 6 essays containing the words wavelet representation.

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

    University essay from Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling; 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

  2. 2. Architecture Designfor Compressed Sensing-Based Low Power Systems

    University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Author : Giovanni Zamolo; [2016]
    Keywords : ;

    Abstract : In the Internet of Things scenario, a desirable feature of wireless sensors is the energy autonomy. However, the transmitter stage needs a great amount of energy to modulate and transmit the interested information. READ MORE

  3. 3. Statistical Parametric Mapping of fMRI data using Spectral Graph Wavelets

    University essay from Linköpings universitet/Medicinsk informatikLinköpings universitet/Tekniska högskolan

    Author : Hamid Behjat; [2012]
    Keywords : Statistical parametric mapping; fMRI; Spectral graph theory; Graph wavelet transform; Wavelet thresholding;

    Abstract : In typical statistical parametric mapping (SPM) of fMRI data, the functional data are pre-smoothed using a Gaussian kernel to reduce noise at the cost of losing spatial specificity. Wavelet approaches have been incorporated in such analysis by enabling an efficient representation of the underlying brain activity through spatial transformation of the original, un-smoothed data; a successful framework is the wavelet-based statistical parametric mapping (WSPM) which enables integrated wavelet processing and spatial statistical testing. READ MORE

  4. 4. Audio editing in the time-frequency domain using the Gabor Wavelet Transform

    University essay from Uppsala universitet/Centrum för bildanalys

    Author : Ulf Hammarqvist; [2011]
    Keywords : Wavelet transform; time-frequency analysis; audio engineering; signal processing; audio restoration; audio interpolation; pitch-shift; time-stretch; loglet; compression; down-sampling; visualization; fourier transform; convolution; filter bank; digital filters; noise reduction; re-assignment; gabor transform; scalogram;

    Abstract : Visualization, processing and editing of audio, directly on a time-frequency surface, is the scope of this thesis. More precisely the scalogram produced by a Gabor Wavelet transform is used, which is a powerful alternative to traditional techinques where the wave form is the main visual aid and editting is performed by parametric filters. READ MORE

  5. 5. Tessellation of the sphere with different compression techniques

    University essay from Högskolan i Gävle/Avdelningen för Industriell utveckling, IT och Samhällsbyggnad

    Author : Ziqiao Ye; [2010]
    Keywords : ;

    Abstract : Many kinds of data have a spherical representation, the idea is to tessellate the "sphere" in an efficient way and then decode the data so it can be compressed easily. In this paper, the process of exploration will start from the basic spherical wavelet-like to some new tessellation compression techniques in 3D to decompose the sphere with squares or triangles. READ MORE