Fractal image coding using rate-distortion optimized matching pursuit

نویسندگان

  • Mohammad Gharavi-Alkhansari
  • Thomas S. Huang
چکیده

Matching pursuit is a general and exible method for solving an optimization problem that is of interest in signal analysis, coding, control theory and statistics. In this paper, principles of rate-distortion optimal coding are used in combination with matching pursuit algorithm to obtain an enhanced fractal image coding method. The advantages of using such a method over traditional fractal image coders are described and compression results are presented.

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

Fractal video coding by matching pursuit

Fractal image and video coders use redundancies present in different scales of natural images for compression. Motion compensation, on the other hand, is a powerful method for exploiting similarities at the same scale in frames of a video sequence. In this paper, a new method is proposed to take advantage of both interscale and intrascale selfsimilarities present in video sequences. A rate-dist...

متن کامل

Matching Pursuit Video Coding|part Ii: Operational Models for Rate and Distortion

We introduce two models for predicting the rate and distortion of the matching pursuit video codec. The rst model is based on a pre-coding analysis pass using the full matching pursuit dictionary. The second model is based on a reduced-complexity analysis pass. We evaluate these models for use within existing rate-distortion optimization techniques. Our prediction results suggest that the model...

متن کامل

Dependent coding in quantized matching pursuit

Matching pursuit, introduced by Mallat and Zhang, is an algorithm for decomposing a signal into a linear combination of functions chosen from possibly redundant dictionary of functions. (A similar greedy algorithm is well known for nding sparse approximate solutions to underdetermined linear systems of equations.) A variant which we call quantized matching pursuit (QMP) has been proposed for va...

متن کامل

Hybrid video coding using bi-dimensional matching pursuit

In this report we propose a new coding scheme based on the Matching Pursuit algorithm and exploiting some of the new features introduced by H.264 for motion estimation. Main points of this work are the design of a redundant dictionary suitable for coding displaced frame differences, the use of fast techniques for atom selection, which work in the Fourier domain and exploit the spatial localizat...

متن کامل

Texture and edge adaptive Weak Matching Pursuit

The objective of image coding is to reduce the number of bits needed to represent an image, while making as few as possible perceptual distortion to the image. Images coded at low bit-rates, say below 0.5bpp, bear the loss of details and sharpness, as well as various artifacts which are perceptually objectionable. On the other hand, with the need for transmission and storage of more and larger ...

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 1996