A new progressive transmission scheme using spline biorthogorial wavelet bases is proposed in this paper: First, several wavelet bases are compared with the spline biorthogo-nul nmvlet bases. By exploiting the properties of this set of wuvelet bases, a fast algorithm involving only additions and subtruc.tintts is developed. Due to the multiresolutional nature cf the wavelet transform. this sche...

An adaptive nonuniform sampling technique for alias-free image representation is presented. It is both fast, thanks to the use of pseudo-Poisson disks (PPDs), and eeective, because a higher sample density is used in areas which are rich in details; these zones of the image are located using a skewness-based operator, which is both simple and accurate, and gradient information. Experimental resu...

We present a JAVA-based Interactive Progressive Local Image Transmission (IPLIT) system for viewing large images over the bandwidth-limited World Wide Web (WWW) in \reasonable (i.e. usable) time". One motivation behind this research is the need for medical specialists to remotely view medical images, in reasonable time, over the WWW. In our IPLIT system, the user employs a JAVA-enabled Internet...

Although there are many adaptive (or view-dependent) multiresolution methods, support for progressive transmission and reconstruction has not been addressed. A major reason for this is that most of these methods require a large portion of the hierarchical data structure to be available at the client before rendering starts. This is due to the dependency constraints among neighboring vertices. I...

Progressive image transmission is difficult in the presence of a noisy channel, mainly due to the propagation of errors during the decoding of a progressive bitstream. Excellent results for this problem are made possible through combined source-channel coding – a method that matches the channel code to the source operational rate-distortion as well as channel conditions. This paper focuses on t...

Transmission of large terrain databases across the Internet is still worrying. A large terrain database requires a big number of polygons and textures, and that represents a problem with current bandwidth and resource limitations. Multiresolution models permit progressive transmission, that is the transmission of a simple model followed by successive refinements. In this work we present a new m...

In this paper, we introduce a formal model which describes consistently levels of detail and regions of interest for the embedded coding and progressive transmission of raster images. This model serves as the foundation of an image communication system which supports the progressive, redundancy-free transmission of multiple, possibly overlapping regions of interest in an image. We propose the r...