LuraDocument LDF represents an innovative compression software custom-tailored
to the compression of scanned color documents composed of both images and text. The documents
are partitioned into pure picture and pure text segments through the use of its
state-of-the-art segmentation algorithm. Each of these segments is then compressed using an algorithm
optimized for this type of data. As a result, scanned color documents can be stored at extremely high
quality despite small file sizes. LuraDocument LDF is capable of reaching compression rates of 1:150 to
1:500 while still preserving full readability of the text and excellent quality of the pictures. This makes
LuraDocument LDF far superior to even the wide spread PDF format.
LuraDocument LDF is a document compression software preserving both the readability of text and
the visual quality and color of images within a compound document. The underlying concept of the
compression process is the partitioning of the document into three distinct segments:
a bilevel image containing text,
a foreground image containing the color information of the text segments and
a residual image devoid of text components.
Each distinct segment is then compressed using seperate algorithms specifically adapted to the
corresponding type of data.
LuraDocument LDF proves to be particularly efficient for documents containing large image components. The
example shows a magazine page scanned at 300 dpi.
