New developments in color facsimile and internet fax

Optimizing block-threshold segmentation for MRC compression

“…6 for the image "compound1" from JPEG 2000's test set 1 . We compare the two algorithms in the MRC context.…”

“…This effect is caused by the algorithm's inherent rate-estimation imprecision. Also, for high enough bit rates (low enough Q d ), the 1 The set of images tested in this paper is shown in [2] Bit-rate (bpp) The search in 2D space is avoided, i.e. the Mask layer can be generated with only one point in the (λ, Q) plane.…”

“…There is now a focus on new standards to provide color facsimile services over the telephone network and the Internet [1]. See [2] for a short overview of document compression standards and techniques.…”

“…When it comes to compound documents different compression algorithms may be applied to each of the regions of the document, by either segmenting the regions or by generating multiple image layers. The mixed raster content (MRC) imaging model [1], [3], [4], which is a multilayer model will be the focus of this paper.…”

Pre-Processing for MRC Layers of Scanned Images

“…These compound documents often challenge traditional compression mechanisms, which are generally developed with a particular image type and application in mind. The mixed raster content (MRC) imaging model [1]- [3], has been proposed as a multi-layer multiresolution representation of a compound document. The basic 3-layer MRC model represents a color image as two color image layers (Foreground or FG and Background or BG) and a binary image layer (Mask).…”