Search Results - "Lempel

Lempel-Ziv factorization using less time & space by Chen, G., Puglisi, Simon, Smyth, B.

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A simple algorithm for computing the Lempel-Ziv factorization by Crochemore, M., Ilie, L., Smyth, William

“…We give a space-efficient simple algorithm for computing the Lempel?Ziv factorization ofa string. For a string of length n over an integer alphabet, it runs in O(n) time independentlyof alphabet size and uses o(n) additional space.…”
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Watermark Compression in Medical Image Watermarking Using Lempel-Ziv-Welch (LZW) Lossless Compression Technique by Badshah, Gran, Liew, Siau-Chuin, Jasni, Mohamad Zain, Mushtaq, Ali

“…This paper focuses on watermarking of ultrasound medical images with Lempel-Ziv-Welch (LZW) lossless-compressed watermarks. …”
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Fast two-stage Lempel-Ziv lossless numeric telemetry data compression using a neural network predictor by Logeswaran,, R

“…Lempel-Ziv (LZ) is a popular lossless data compression algorithm that produces good compression performance, but suffers from relatively slow processing speed. …”
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Optimal large linear complexity frequency hopping patterns derived from polynomial residue class rings by Udaya, Paramapalli, Siddiqi, Mohammad Umar

“…Our constructions can be classified into linear and nonlinear categories, both giving optimal Hamming correlations according to Lempel-Greenberger bound. The nonlinear sequences have large linear complexity and can be seen as a generalized version of GMW sequences over fields…”
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Cryptanalysis of a family of 1D unimodal maps by Md Said, Mohamad Rushdan, Hina, Aliyu Danladi, Banerjee, Santo

“…With a view to be applied in cryptography as a Pseudo-Random number genera-tor (PRNG), the complexity of the constructed map as a source of randomness is determined using both the permutation entropy (PE)and the Lempel-Ziv (LZ-76) complexity measures, and the results are compared with numerical simulations.…”
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Sub-micron technology development and system-on-chip (Soc) design - data compression core by Husin, Nasir Sheikh

“…The design of the core is based on the combination of Lempel-Ziv-Storer-Szymanski (LZSS) compression algorithm and Huffman coding. …”
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Watermarking of Ultrasound Medical Images in Teleradiology Using Compressed Watermark by Gran, Badshah, Liew, Siau-Chuin, Jasni, Mohamad Zain, Mushtaq, Ali

“…Different lossless compression techniques including Lempel-Ziv-Welch (LZW) were tested for watermark compression. …”
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Importance of Watermark Lossless Compression in Digital Medical Image Watermarking by Gran, Badshah, Liew, Siau-Chuin, Jasni, Mohamad Zain, Syifak Izhar, Hisham, Amatul, Zehra

“…This paper focuses on Ultrasound medical image region of interest(ROI) lossless compression as watermark using different techniques; PNG, GIF, JPG, JPEG2000 and Lempel Ziv Welsh (LZW). LZW technique was found 86% better than other tabulated techniques. …”
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Performance evaluation of compression techniques on scientific dataset / Lam Wai Leong by Lam , Wai Leong

“…Though most theoretical background of compression tool compresses datasets based on Lempel-ziv’s algorithm, in reality, these tools varied when it comes to compressing a binary file to a text file or a graphical one. …”
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Measuring the performance of image data by using RLE algorithm in lossless compression technique by Nurmarsyita, Mohd Shah

“…There are a lot of lossless compression technique that can measure the performance of image data which are Huffman, Arithmetic, Lempel-Ziv Welch (LZW) and Run-Length Encoding (RLE) . …”
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Secured Telemedicine Using Whole Image as Watermark with Tamper Localization and Recovery Capabilities by Liew, Siau-Chuin, Badshah, Gran, Jasni, Mohamad Zain, Mushtaq, Ali

“…The complete image is compressed using the Lempel-Ziv-Welch (LZW) lossless compression technique to get the watermark in reduced number of bits. …”
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Efficient algorithms for two extensions of LPF table: the power of suffix arrays by Crochemore, M., Iliopoulos, Costas, Kubica, M., Rytter, W., Walen, T.

“…The concept of a longest previous factor is inherent to Ziv-Lempel factorization of strings in text compression, as well as in statistics of repetitions and symmetries. …”
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Watermarking of single and multi frame ultrasound medical images by Gran, Badshah

“…Therefore, watermark must be lossless compressed to reduce its size without data loss. In the past Lempel-Ziv Welch (LZW) has been used for text, image pixel data lossless compression and in this research we extend this technique to binary watermark lossless compression to enhance the performance of region based watermarking techniques. …”
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Data Compression For Multimedia Computing by Mohd Tarmizi, Musa

“…Under the lossless technique, the Huffman Coding, Arithmetic Coding and Lempel-Ziv Welch Coding are discussed. On the other hand, the Predictive, Frequency Oriented and Importance Oriented techniques are discussed under the lossy technique. …”
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