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检索条件"主题词=block truncation coding"

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Content Based Image Retrieval using Dither block truncation coding with similarity comparison algorithm 1

Content Based Image Retrieval using Dither Block Truncation ...

引用

International Conference on Computer Communications and Electronics (Comptelix)

作者： Yadav, Pradeep Gupta, Rishi Kumar, Sandeep Jagannath Univ Jaipur Rajasthan India

ISBN: (纸本)9781509047086

The main aim of this paper is to reduce the computational time, to increase the complexity ratio and to improve the image quality by applying dither Dither block truncation coding algorithm with different similarity comparison algorithm, as different approaches are followed to improve the quality of an image, ODBTC is one of the approach, but to improve the quality we will also include some of the best similarity measurement algorithm like normalized and mini-max ratio, on the other hand feature selection is also one of the important factor to improve the performance measurement, previously we were using color(CF) and bit pattern(BF) separately but here we will combine both color with bit pattern(CBF)feature so more improved result will occur.

关键词： block truncation coding Order Dither block truncation coding and euclidean distance measurement algorithm

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Eliminating blocking artifacts in halftoning-based block truncation coding 24

Eliminating blocking artifacts in halftoning-based block tru...

引用

24th European Signal Processing Conference (EUSIPCO)

作者： Xu, Zi-Xin Chan, Yuk-Hee Hong Kong Polytech Univ Elect & Informat Engn Dept Hong Kong Hong Kong Peoples R China

ISBN: (纸本)9780992862657

block truncation coding (BTC) is an effective lossy image coding technique that enjoys both high efficiency and low complexity especially when halftoning techniques are employed to shape the noise spectrum of its output. However, due to its block-based nature, blocking artifacts are commonly found in the coding outputs. In this work, a real-time halftoning-based BTC algorithm is proposed to solve this problem by eliminating the cause of blocking artifacts while maintaining a complexity comparable to the best state-of-the-art halftoning-based BTC algorithm. Both objective and subjective comparisons demonstrate the visual quality improvement in its encoding outputs.

关键词： block truncation coding halftoning blocking artifacts

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An Improved block truncation coding Using Rectangular Non-symmetry and Anti-packing Model 18th

An Improved Block Truncation Coding Using Rectangular Non-sy...

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18th International Conference on Intelligent Computing (ICIC)

作者： Zheng, Yunping Xu, Yuan Kuang, Jinjun Sarem, Mudar South China Univ Technol Sch Comp Sci & Engn Guangzhou Peoples R China Huazhong Univ Sci & Technol Sch Software Engn Wuhan Peoples R China Gen Org Remote Sensing Damascus Syria

ISBN: (纸本)9783031138706;9783031138690

block truncated coding (BTC) is an image compression algorithm with a simple coding process and a high coding speed, which can be used in the field of military communications with high real-time requirements. As the price of pursuing simplicity and high speed, the compression ratio and the quality of the decoded image are sacrificed to some extent. Although some strategies have been proposed to improve the compression ratio and the quality of the decoded images, the effect is not obvious. Inspired by the quadtree-based block truncation coding (QEDBTC) and the non-symmetry and anti-packing model (NAM), in this paper, we propose a novel rectangular NAM-based block truncation algorithm (RNAMEDBTC), which uses rectangular NAM strategy to divide the initial blocks into rectangular homogeneous blocks. The spatial frequency measurement (SFM) is used as a measurement parameter to subdivide the initial blocks. For each homogeneous block, we replace the high and low quantization values and the binary bitmaps in the traditional block truncation coding with the average value of the pixels in the block, thereby a great improvement of the compression rate of the algorithm is achieved. In order to further improve the compression rate, we have increased the area of the smaller homogeneous blocks, and thus reducing the number of homogeneous blocks. These expanded blocks are called non-homogeneous blocks. For each non-homogeneous block, we need to do error diffusion block truncation coding (EDBTC) processing. The experimental results in this paper show that without degrading the quality of the decoded image, the proposed algorithm improves the compression rate significantly by 158.3% and 30.8% higher than the traditional BTC and QEDBTC algorithms, respectively.

关键词： block truncation coding Non-symmetry and Anti-packing model SFM

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Assessment of Similarity Measurement Criteria in Thepade's Sorted Ternary block truncation coding (TSTBTC) for Content Based Video Retrieval

Assessment of Similarity Measurement Criteria in Thepade's S...

引用

International Conference on Communication, Information & Computing Technology (ICCICT)

作者： Thepade, Sudeep D. Yadav, Nalini B. Savitribai Phule Pune Univ Pimpri Chinchwad Coll Engn Dept Comp Engn Pune Maharashtra India

ISBN: (纸本)9781479955220

Rapid growth in Information technology and Communication networking, have increased the inclination of professionals in storage and archival of multimedia-video data. Efficient and accurate retrieval of archived video data is essential need of many professional groups like researchers, analyst, journalist and historians. Textual metadata based video retrieval is intuitive and subject to human perception. Thus researchers are exploiting the opportunity of extracting the features based on content of video and retrieve the video accordingly. There rises a new horizon of Content Based Video Retrieval. Color content based video retrieval has been attempted using block truncation coding and variations of it. Thepade's Sorted Ternary block truncation coding level 2 (TSTBTC-2) has been attempted for Color Content Based Video Retrieval in this paper. The paper attempts detailed performance comparison of sixteen similarity measures alias Euclidean Distance, City block Metric, Chebychev Distance, Mean Square Error, Hamming Distance, Minkowski Distance, Soergel Distance, Sorensen Distance, Canberra Distance, Kulczynski Distance, Wave Hedges Distance, Harmonic Mean Distance, Cosine Similarity, Jaccard Distance, Fidelity Distance and Squared Chord Distance across five families L-p Minkowski family, L-1 family, Intersection family, Inner Product Family and Fidelity family. TSTBTC-2 based video retrieval experimentation is done on test bed of 500 videos with 500 queries and the average accuracy is computed. After experimentation it has been found that Lp Minkowski family performs better and fidelity family's similarity measures are not suitable for applications like Color Content Based Video Retrieval. Among all similarity measures considered Sorensen Distance shows best performance followed by City block Metric measure.

关键词： Color Content Based Video Retrieval block truncation coding Thepade's Sorted Ternary block truncation Codin Similarity measures

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Color Image coding Based on block truncation coding Using Quadtree Segmentation 3

Color Image Coding Based on Block Truncation Coding Using Qu...

引用

3rd International Conference on Computer and Communication Systems (ICCCS)

作者： Hu, Yu-Chen Liu, Yi-Hung Chang, I-Cheng Providence Univ Dept CSIM Taichung Taiwan Shantou Univ Business Sch Shantou Guangdong Peoples R China Natl Dong Hwa Univ Dept CSIE Hualien Taiwan

ISBN: (纸本)9781538663509

In this paper, we proposed a bit-rate adjustable color image compression technique based on block truncation coding. To exploit the similarity among the neighboring pixels, the quadtree segmentation technique is used to divide the color image into variable-sized blocks based on their block activities. Different rules are used to encode the image blocks of different sizes. Experimental results reveal that good image qualities of the reconstructed color images can be achieved by the proposed technique while keeping low bit rates.

关键词： color image coding block truncation coding quadtree segmentation bit map omission

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Near-Aperiodic Dot-Diffused block truncation coding

Near-Aperiodic Dot-Diffused Block Truncation Coding

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Liu, Yun-Fu Guo, Jing-Ming Wu, Zong-Jhe Lee, Hua Natl Taiwan Univ Sci & Technol Dept Elect Engn Taipei Taiwan Univ Calif Santa Barbara Dept Elect & Comp Engn Santa Barbara CA 93106 USA

ISBN: (纸本)9781479983919

In this study, an improved block truncation coding (BTC) image compression scheme, namely Near-Aperiodic Dot-Diffused BTC (NADDBTC), is described. Firstly, the existing regular structures for the generation of bitmap are completely modified for aperiodic compressed results. Moreover, an adaptive quantization levels selection strategy and two parameters Class Matrix (CM) and Diffused Matrix (DM) for image compression are developed and co-optimized. The improvements produce results of superior image quality. Furthermore, the adaptive quantization levels are introduced for balanced false contour, impulsive noise, and blocking artifact. Experimental results demonstrate that the proposed NADDBTC is capable of providing excellent image quality and visual perception, as well as processing efficiency, similar to DDBTC by exploiting the innate parallelism advantage of dot diffusion.

关键词： Image compression block truncation coding dot diffusion digital halftoning optimization

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Content Based Video Retrieval Scheme Using Halftone block truncation coding 2

Content Based Video Retrieval Scheme Using Halftone Block Tr...

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2nd IEEE International Conference on Recent Trends in Electronics, Information and Communication Technology (RTEICT)

作者： Borkar, Savita V. Katariya, Shraddha S. Amrutvahini Coll Engn Dept Elect Engn Sangamner Maharashtra India

ISBN: (纸本)9781509037049

Evolutions in image-data processing is rapidly changing from text-based retrieval systems to video retrieval which is created on content based systems due to its eminent demand in digital market and that can be possible only due to available multimedia data types and available bandwidth. In proposed method of Content Based Video Retrieval (CBVR) the Ordered-Dither block truncation coding (ODBTC) technique is employed which generates appropriate image contents. Combinations of Void-and-cluster half-toning and block truncation coding (BTC) offers low complexity in algorithm and provides better video image quality. Dither array Look-Up-Table (LUT) is a distinctive feature of ODBTC which reduces the difficulties by providing look up values of segmented blocks. ODBTC encoded streams are used for generation of two distinct features including of color features namely Color Co-occurrence Feature (CCF) and Bit Pattern Features (BPF). After quantizing and bit-mapping from ODBTC encoder, BPF is obtained by LUT. In the presented system, CBVR is achieved by block truncation (BT) of expected video information to be retrieved. Proposed system provides good remedy for CBVR for large digital video-data processing in the fields of Image and Video Processing.

关键词： block truncation coding content based video retrival color co-occurrence feature and bit pattern features half-toning ordered-dither block truncation coding

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Image coding Algorithm Based on Modified block truncation coding and Delta Modulation 13

Image Coding Algorithm Based on Modified Block Truncation Co...

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13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)

作者： Peric, Zoran H. Simic, Nikola Savic, Milan S. Univ Nis Fac Elect Engn Aleksandra Medvedeva 14 Nish 18000 Serbia Univ Pristina Fac Nat Sci & Math Ive Lole Ribara 29 Kosovska Mitrovica 38220 Serbia

ISBN: (纸本)9781538618004

In this paper we discuss application of delta modulation technique to the modified block truncation coding algorithm. The main idea of the research is to propose a simple improvement to the block truncation coding algorithm and to analyze its performance. The proposed hybrid system is tested for a set of standard test grayscale images and the results are compared with the classic method.

关键词： block truncation coding Delta modulation Image processing

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Predictive absolute moment block truncation coding for image compression

引用

Conference on Visual Communications and Image Processing

作者： Subramanian, S Makur, A TUE Ctr User Syst Interact IPO Eindhoven Netherlands

ISBN: (纸本)0819437034

block truncation coding is one of the oldest known forms of image compression algorithms, its main attraction being its simple underlying concepts and ease of implementation. In this paper we present a new Predictive Absolute Moment block truncation coding scheme which improves the performance of the existing block truncation coding schemes. The proposed scheme is based on selectively predicting the reconstruct-ion values of a block based on the corresponding values in the neighbouring blocks, as well as predicting the bitplane from the bitplanes of the corresponding blocks in other colour components.

关键词： image compression block truncation coding prediction

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block truncation coding-based Audio Compression Technique

Block Truncation Coding-based Audio Compression Technique

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作者： Mark Daniel I.Dacles Ryan Rey M.Daga University of the Philippines Visayas Tacloban College

There have been an increasing utilization and consumption of audio files in various applications across different desktop and mobile devices. Thus, audio data compression has been beneficial in reducing the bandwidth and disk space requirements of such data. block truncation coding(BTC), a well-known data compression technique for digital images, was used as the underlying algorithm in encoding audio data. A new encoding technique for audio data was proposed with the following components:(1) quadtree for audio block segmentation,(2) AMBTC for computation of representative values, and(3) Huffman coding for lossless data representation. The performance of the proposed encoding technique was benchmarked and measured using Peak Signal-to-Noise Ratio(PSNR) and compression rate.

关键词： Audio data compression block truncation coding quadtree Huffman coding

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