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Progressive image transmission using discrete wavelet transforms

  • US 5,880,856 A
  • Filed: 11/19/1996
  • Issued: 03/09/1999
  • Est. Priority Date: 12/05/1994
  • Status: Expired due to Term
First Claim
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1. A method of transferring a still image which is represented by a plurality of decomposition levels, each decomposition level comprising a plurality of subimages which allow reconstruction of an image representation of the still image, said subimages having rows of subimage values corresponding to rows of said image representation, the decomposition levels providing increasingly higher levels of image resolution, the method comprising the following steps:

  • successively transmitting the decomposition levels, starting with a base decomposition level providing a low level of image resolution and continuing with decomposition levels providing increasingly higher levels of image resolution;

    transmitting the subimage values of each particular decomposition level as row blocks, wherein each row block contains a row of subimage values from different subimages of the particular decomposition level, and wherein the subimage values of each row block correspond to a common image representation row.

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