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Wavelet Transform Codec for Fast Retrieval of Slices of 3D Objects

Thirumalai, V and Kanhirodan, R (2005) Wavelet Transform Codec for Fast Retrieval of Slices of 3D Objects. In: Instrumentation and Measurement Technology Conference, 2005. IMTC 2005, 16-19 May, ottawa, Ontario, Canada.

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Abstract

We propose a method to encode a 3D magnetic resonance image data and a decoder in such way that fast access to any 2D image is possible by decoding only the corresponding information from each subband image and thus provides minimum decoding time. This will be of immense use for medical community, because most of the PET and MRI data are volumetric data. Preprocessing is carried out at every level before wavelet transformation, to enable easier identification of coefficients from each subband image. Inclusion of special characters in the bit stream facilitates access to corresponding information from the encoded data. Results are taken by performing Daub4 along x (row), y (column) direction and Haar along z (slice) direction. Comparable results are achieved with the existing technique. In addition to that decoding time is reduced by 1.98 times. Arithmetic coding is used to encode corresponding information independently

Item Type: Conference Paper
Additional Information: Copyright Belongs to IEEE
Keywords: Compression;Preprocessing;Wavelet Transform
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation and Applied Physics (Formally ISU)
Date Deposited: 13 Sep 2011 12:12
Last Modified: 13 Sep 2011 12:12
URI: http://eprints.iisc.ernet.in/id/eprint/40468

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