Predictive MH coding for fingerprint pictures.

Coding of Still Pictures

Coding of Still Pictures

In 1996, the JPEG committee began to investigate possibilities for a new still image compression standard to serve current and future applications. This initiative, which was named JPEG2000, has resulted in a comprehensive standard (ISO 15444 | ITU-T Recommendation T.800) that is being issued in six parts. Part 1, in the same vein as the JPEG baseline system, is aimed at minimal complexity and ...

Predictive ordering technique and feedback transform coding for data compression of still pictures

This paper presents a new method for efficient image coding, consisting of a cascade of the following processing stages: i) predictive ordering technique (POT); ii) feedback transform coding (FTC); iii) vertical subtraction of quantized coefficients (VSQC); iv) predictive coding refinements in the signal space consisting of either overshoot suppression (OS) as a first variant or hybrid block tr...

Direct macroblock coding for predictive (P) pictures in the H.264 standard

In this paper we introduce a new Inter Macroblock type within the H.264 (or MPEG-4 AVC) video coding standard that can further improve coding efficiency by exploiting the temporal correlation of motion within a sequence. This leads to a reduction in the bits required for encoding motion information, while retaining or even improving quality under a Rate Distortion Optimization Framework. An ext...

Algorithms for coding scanned halftone pictures

A method of coding scanned documents containing halftone pictures, e.g. newspapers and magazines, for transmission purposes in prepress is proposed. The halftone screen is estimated and the grey value of each dot is found, thus giving a compact description. At the receiver the picture is re-screened. A new data structure and related algorithms for handling the digital screen without restriction...