There are many instances in which human observers are the final judges of the quality of a compressed image. In such situations, it is useful to incorporate a model of the human visual system (HVS) into th e image compression system in order to reduce or even eliminate the visual distortions introduced to the reconstructed image. A compressed image is said to be perceptually lossless for a spec...

In this work, we present a new family of image compression algorithms derived from Shapiro’s embedded zerotrce wavelet (EZW) coder. These new algorithms introduce robustness to transmission errors into the bit stream while still preserving its embedded structure. This is done by partitioning the wavelet coefficients into groups, coding each group independently, and interleaving the bit streams ...

This paper represents the wavelet techniques used for compression of gray scale and true color images. Image compression methods is applied on the EZW has been successfully implemented to provide high compression rates maintaining ratio can be reached to good quality of the image with different level wavelet codes.

This paper presents a fast and modi"ed version of the embedded zero-tree wavelet (EZW) coding algorithm that is based on [4,5,15,20] for low bit-rate still image compression applications. The paper presents the trade-o! between the image compression algorithm speed and the reconstructed image quality measured in terms of PSNR. The measurements show a performance speedup by a factor of 6 in aver...

We propose an architecture for Tier-1 of Embedded Block Coding With Optimized Truncation (EBCOT) in the JPEG2000 standard. The architecture is composed of a 16-bit parallel context generator and a 3-stage pipelined binary arithmetic encoder. The former is designed for low power consumption. The later is used to achieve an high throughput. The design is verified on an AMBA-based system as an acc...

Motivated by both Shapiro's embedded zerotree wavelet (EZW) coding and Taubman's layered zero coding (LZC) approaches, we propose an embedded DCT still image compression scheme in this work. The new method generates a single embedded bit stream for DCT coe cients according to their importance. It is demonstrated that the new method performs better than the JPEG standard in rate-distortion tradeo .

Fingerprint compression is essential to store more number of fingerprints in the digital storage media as well as transfer from one place to another using network faster. This paper deals with various compression techniques such as JPEG, wavelet, SPHIT, modified SPHIT, EZW and edge detection methods for fingerprint image.

JPEG2000 is the new standard for the compression of images, which succeeds to JPEG. This standard is motivated primarily by the need for compressed image representations that offer new features increasingly demanded by modern applications, and also offering superior compression performance, especially at low bit-rates. This new standard has many features and characteristics (region of interest,...