Advances in visual data compression and communication - download pdf or read online

By Wu F.

Show description

Read or Download Advances in visual data compression and communication PDF

Best imaging systems books

Volker J. Schmid, Anke Meyer-Baese's Pattern Recognition in Medical Imaging PDF

Scientific Imaging has turn into the most vital visualization and interpretation tools in biology and medecine over the last decade. This time has witnessed a massive improvement of latest, robust tools for detecting, storing, transmitting, examining, and showing scientific photographs. This has ended in an incredible development within the software of electronic processing suggestions for fixing scientific difficulties.

Read e-book online Image Acquisition and Processing with LabVIEW (Image PDF

Photograph Acquisition and Processing With LabVIEW? combines the final concept of photograph acquisition and processing, the underpinnings of LabVIEW and the NI imaginative and prescient toolkit, examples in their purposes, and real-world case reviews in a transparent, systematic, and richly illustrated presentation. Designed for LabVIEW programmers, it fills an important hole within the technical literature by means of supplying a common education guide for these new to nationwide tools (NI) imaginative and prescient program improvement and a reference for more matured imaginative and prescient programmers.

Download e-book for kindle: Software Engineering for Image Processing Systems (Image by Philip A. Laplante

Software program Engineering for photograph Processing platforms creates a contemporary engineering framework for the specification, layout, coding, trying out, and upkeep of picture processing software program and structures. The textual content is designed to learn not just software program engineers, but in addition employees with backgrounds in arithmetic, the actual sciences, and different engineering disciplines, who locate themselves engaged on a software program undertaking workforce.

Extra resources for Advances in visual data compression and communication

Sample text

Third, different VLC tables can be selected where the codes are designed for more efficiently encoding at ranges of lower or higher rates. The selection is controlled by the encoder and depends on the target rate. Finally, the direct mode can determine the motion vectors within B pictures by inferencing from the co-located motion vectors in P picture without rate overhead. In addition to layered scalable video coding, MPEG-4 also specifies fine granularity scalable (FGS) coding. It enables the compressed stream to be truncated at any length, which better fits the bandwidth fluctuation in the Internet.

2 2 4 4 8 8 The most straightforward way to conduct source coding is to assign 2 different bits to every symbol. It is so-called fixed length coding (FLC). The expected length L(S) is 2 bits too. 25 bits and thus FLC is not optimal. This simple example shows the importance of source coding in the information theory. According to the theory, shorter codewords should be assigned to symbols with larger probabilities, while longer codewords to symbols with smaller probabilities. This is the basis of variable length coding (VLC).

Note that it is not essential that the probabilities used in the encoding be equal to the true distribution of the source. In some cases, such as in image and video compression, it is difficult to describe a true distribution for the source. Even then, it is possible to apply the above arithmetic coding procedure. The procedure will be efficient only if the model distribution is close to the empirical distribution of the source. A more sophisticated use of arithmetic coding is to change the model dynamically to adapt to the source, which has been adopted in the recent video coding standards.

Download PDF sample

Rated 4.99 of 5 – based on 35 votes