Generalized Golomb Codes and Adaptive Coding of Wavelet-Transformed Image Subbands
نویسندگان
چکیده
We describe a class of prefix-free codes for the nonnegative integers. We apply a family of codes in this class to the problem of runlength coding, specifically as part of an adaptive algorithm for compressing quantized subbands of wavelettransformed images. On test images, our adaptive coding algorithm is shown to give compression effectiveness comparable to the best performance achievable by an alternate algorithm that has been previously implemented.
منابع مشابه
Adaptive Wavelet Transformation for Image Coding Using a Forecast Decomposition Selection
This paper presents a new approach to an adaptive wavelet transformation. Contrary to the known techniques for wavelet packets, relevant statistical properties (mainly the correlation) of the current subband are rst analyzed. Dependent on that, the decomposition decision is made, whether the subband should be transformed or not. This procedure does not yield to a best-basis selection but to a n...
متن کاملLow-complexity and low-memory entropy coder for image compression
In this paper, a low-complexity and low-memory entropy coder (LLEC) is proposed for image compression. The two key elements in the LLEC are zerotree coding and Golomb–Rice (G–R) codes. Zerotree coding exploits the zerotree structure of transformed coefficients for higher compression efficiency. G–R codes are used to code the remaining coefficients in a variable-length codes/variable-length inte...
متن کاملOptimized computational Afin image algorithm using combination of update coefficients and wavelet packet conversion
Updating Optimal Coefficients and Selected Observations Affine Projection is an effective way to reduce the computational and power consumption of this algorithm in the application of adaptive filters. On the other hand, the calculation of this algorithm can be reduced by using subbands and applying the concept of filtering the Set-Membership in each subband. Considering these concepts, the fir...
متن کاملAN ADAPTIVE WAVELET SOLUTION TO GENERALIZED STOKES PROBLEM
In this paper we will present an adaptive wavelet scheme to solvethe generalized Stokes problem. Using divergence free wavelets, theproblem is transformed into an equivalent matrix vector system, thatleads to a positive definite system of reduced size for thevelocity. This system is solved iteratively, where the applicationof the infinite stiffness matrix, that is sufficiently compressible,is r...
متن کاملA Very Low Bit Rate Algorithm Based on Hierarchical Subband Scanning
A very low bit rate algorithm based on hierarchical partition of subbands in the wavelet domain is proposed. The algorithm uses the set partitioning technique to sort the transformed coefficients. The threshold of each subband is calculated and the subbands scanning sequence is determined by the magnitude of the thresholds which establish a hierarchical scanning not only for the set of coeffici...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2003