Message-Id: <mailto:199412311958.NAA13335@library.wustl.edu> Date: Sat, 31 Dec 1994 11:56:23 -0800 From: Raymond Lauzzana <mailto:lauzzana@NETCOM.COM> Subject: Re: progressive transmission To: Multiple recipients of list IMAGELIB
It has to do whth the ordering of the sample in the image. That is the way in which an image is transmitted and stored is a reshuffled ordering of the pixels, so that the middele pixel occurs first and the highest resolution pixels occur last. The net result is an ordering that is somewhat similar to a pr/pyramid of pictures with the lowest resolution at the top. Since sampling is nearly equivalent to averaging pictures are distplayed lowest resolution first.There are lots of interesting properties to these "image pyramids". They have some qualityies that they share with Fourier transforms, ie. DC first, etc. They have been discussed in image analysis litterature for years, PAMI is a good source.
- Ray