Essays about: "wavelet representation"

Showing result 6 - 8 of 8 essays containing the words wavelet representation.

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

    University essay from 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

  3. 7. Tessellation of the sphere with different compression techniques

    University essay from 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

  4. 8. An efficient wavelet representation for large medical image stacks

    University essay from Institutionen för systemteknik

    Author : Daniel Forsberg; [2007]
    Keywords : medical image stacks; wavelet representation; progressive transmission; random access; thick slab viewing;

    Abstract : Like the rest of the society modern health care has to deal with the ever increasing information flow. Imaging modalities such as CT, MRI, US, SPECT and PET just keep producing more and more data. Especially CT and MRI and their 3D image stacks cause problems in terms of how to effectively handle these data sets. READ MORE