A Scalable Wavelet Image Coding Scheme Using Multi - Stagepruned Tree - Structured Vector

نویسندگان

  • Hamid Jafarkhani
  • Nariman Farvardin
چکیده

A hierarchical pruned tree-structured vector quantizer (PTSVQ) employing multi-stage PTSVQ's is introduced to encode image wavelet coeecients. The result is a low-complexity and scalable image coding system. The eeects of non-square selection of the block sizes and normalization on the performance of the system are investigated.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Intelligent scalable image watermarking robust against progressive DWT-based compression using genetic algorithms

Image watermarking refers to the process of embedding an authentication message, called watermark, into the host image to uniquely identify the ownership. In this paper a novel, intelligent, scalable, robust wavelet-based watermarking approach is proposed. The proposed approach employs a genetic algorithm to find nearly optimal positions to insert watermark. The embedding positions coded as chr...

متن کامل

Wavelet based Enhanced Color Image Compression relying on Sub-band Vector Quantization

Increase in the use of color images in the continuous expansion of multimedia applications has increased the demand for efficient techniques that can store and transmit visual information. This demand has made image compression a vital factor and has increased the need for efficient algorithms that can result in high compression ratio with minimum loss. This paper proposes an innovative techniq...

متن کامل

Vector Set Partitioning with Classified Successive Refinement Vq for Embedded Wavelet Image Coding*

Set Partitioning in Hierarchical Trees (SPIHT), proposed by Said and Pearlman [1], is generally regarded as a very efficient wavelet-based still image compression scheme. The algorithm uses an efficient, joint scanning and bit-allocation mechanism for quantizing the scalar wavelet coefficients, and produces a perfectly embedded bitstream. This work extends set partitioning to scan vectors of wa...

متن کامل

Scalable Direction Representation for Image Compression with Direction-Adaptive Discrete Wavelet Transform

The direction-adaptive discrete wavelet transform (DA-DWT) locally adapts the filtering direction to the geometric flow in the image. DA-DWT image coders have been shown to achieve a rate-distortion performance superior to non-adaptive wavelet coders. However, since the direction information must always be signalled regardless of total bit-rate, performance at very low bit-rates might be worse....

متن کامل

Rate-Complexity Scalable Multi-view Image Coding with Adaptive Disparity-Compensated Wavelet Lifting

Abstract. This paper presents a novel algorithm for rate-complexity scalable multi-view image coding using an adaptive disparity-compensated (DC) wavelet lifting scheme. First, image regions of multi-view images are prioritized by counting matching points. The proposed algorithm selects either Haar, 5/3, or our proposed multiple picture reference DC wavelet lifting adaptively. The selection cri...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1995