Image coding method and apparatus for localized decoding at multiple resolutions

The method generates a compressed digital image from a original image. The compressed digital image allows random access to portions of the compressed image at a number of resolutions. The original image is first transformed ( 103 ) by a multi-level DWT to form a non-redundant multiple resolution fr...

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1. Verfasser:	ANDREW JAMES PHILIP
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY HANDLING RECORD CARRIERS IMAGE DATA PROCESSING OR GENERATION, IN GENERAL PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS
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creator	ANDREW JAMES PHILIP
description	The method generates a compressed digital image from a original image. The compressed digital image allows random access to portions of the compressed image at a number of resolutions. The original image is first transformed ( 103 ) by a multi-level DWT to form a non-redundant multiple resolution frequency domain representation of the image. The representation comprises a DC subband and a plurality of high frequency subbands arranged as levels, where each level represents a frequency contribution between adjacent resolutions and where each subband comprises a plurality of tiles. The DC subband is then entropy encoded ( 104 ) into the bitstream. The high frequency subbands are next entropy encoded ( 108,109 , and 110 ) into the bitstream in level order ( 105,113,114 ) and tile order ( 107,111 ).
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The compressed digital image allows random access to portions of the compressed image at a number of resolutions. The original image is first transformed ( 103 ) by a multi-level DWT to form a non-redundant multiple resolution frequency domain representation of the image. The representation comprises a DC subband and a plurality of high frequency subbands arranged as levels, where each level represents a frequency contribution between adjacent resolutions and where each subband comprises a plurality of tiles. The DC subband is then entropy encoded ( 104 ) into the bitstream. The high frequency subbands are next entropy encoded ( 108,109 , and 110 ) into the bitstream in level order ( 105,113,114 ) and tile order ( 107,111 ).</abstract><oa>free_for_read</oa></addata></record>
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subjects	CALCULATING COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY HANDLING RECORD CARRIERS IMAGE DATA PROCESSING OR GENERATION, IN GENERAL PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS
title	Image coding method and apparatus for localized decoding at multiple resolutions
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