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Novel image authentication scheme with fine image quality for BTC-based compressed images

MULTIMEDIA TOOLS AND APPLICATIONS 2016年第8期75卷 4771-4793页

作者： Li, Wei Lin, Chia-Chen Pan, Jeng-Shyang Harbin Inst Technol Shenzhen Grad Sch Sch Comp Sci & Technol Shenzhen Peoples R China Providence Univ Dept Comp Sci & Informat Management Taichung Taiwan Fujian Univ Technol Coll Informat Sci & Engn Fuzhou Peoples R China

A novel image authentication scheme which can protect the image integrity of the compressed images for block truncation coding (BTC) is proposed in this paper. In the proposed scheme, the authentication codes are embedded into the the quatization levels of each BTC-compressed image block by using reference matrix- RM (B) . The size of the authentication codes can be decided according to the user's requirement by adjusting the value of B in Reference Matrix. The experimental results demonstrate that the proposed method outperforms previous approaches in image quality of the embedded image and high detecting accuracy.

关键词： Image authentication Tamper detection block truncation coding

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Robust and imperceptible image watermarking in DWT-BTC domain

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INTERNATIONAL JOURNAL OF ELECTRONIC SECURITY AND DIGITAL FORENSICS 2016年第1期8卷 53-62页

作者： Zargar, Anum Javeed Singh, Amit Kumar Jaypee Univ Informat Technol Waknaghat Dept Comp Sci & Engn Solan 173234 Himachal Prades India

In this paper, an algorithm for digital image watermarking based on discrete wavelet transforms ( DWT) and block truncation coding ( BTC) has been proposed. In the embedding process, the host image is decomposed into first level DWT and the watermark image is compressed by BTC. The compressed watermark is then embedded into the selected sub-band of the host image. The proposed method has been extensively tested against numerous known signal processing attacks and has been found to be robust and highly imperceptible. Further, the performance of the algorithm has been tested with fractal compression technique. The performance of the BTC-based technique is better than the fractal-based compression techniques in terms of robustness and imperceptibility.

关键词： watermarking discrete wavelet transform DWT block truncation coding BTC robustness peak signal to noise ratio PSNR NC

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Parallel and Element-Reduced Error-Diffused block truncation coding

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IEEE TRANSACTIONS ON COMMUNICATIONS 2010年第6期58卷 1667-1673页

作者： Guo, Jing-Ming Lin, Chih-Yu Natl Taiwan Univ Sci & Technol Dept Elect Engn Taipei 106 Taiwan

block truncation coding (BTC) is an efficient compression technique for its inherent simple coding strategy. However, the annoying blocking effect and false contour accompanied in high coding gain configurations make the applications relatively limited compares to some up-to-date compression schemes. For this, Error-Diffused block truncation coding (EDBTC) is proposed to solve these problems and obtain satisfactory results. Unfortunately, the EDBTC sacrifices the parallel advantage of traditional BTC. Moreover, the number of diffused directions of EDBTC can be reduced to obtain higher efficiency. For these, the Interlaced Error-Diffused block truncation coding (IEDBTC) is proposed in this work to claim back the parallel advantage. In addition, the diffused elements are also reduced from four to two with the proposed optimization procedure while preserving the image quality.

关键词： block truncation coding error diffusion error-diffused block truncation coding interlaced error-diffused block truncation coding

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Adaptive Multi-level block truncation coding for Frame Memory Reduction in LCD Overdrive

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IEEE TRANSACTIONS ON CONSUMER ELECTRONICS 2010年第2期56卷 1130-1136页

作者： Wang, Jun Chong, Jong-Wha Hanyang Univ Dept Elect & Comp Engn Seoul 133791 South Korea

To reduce frame memory usage in LCD overdrive, block truncation coding (BTC) is commonly used due to its efficient coding and low implementation cost. However, the inherent limitation of BTC causes severe perceptual artifacts and degrades overdrive performance. To solve this problem, we propose an adaptive multi-level BTC (AM-BTC) in this paper. The AM-BTC firstly overcomes the limitation by adaptively selecting 2-level or 4-level BTC according to the edge property of the coding block. Then, to reduce the bit rate of AM-BTC we improve the 2-level and 4-level BTCs by using only luminance bit-map to represent three color bit-maps. As shown in simulation results, the AM-BTC successfully reduces the frame memory usage to 1/6 and significantly improves coding performance (up to 3.779 dB) as compared with other algorithms. When the AM-BTC is applied to LCD overdrive, it also improves overdrive performance up to 3.390 dB as compared with other competitive methods in literature(1).

关键词： LCD overdrive block truncation coding adaptive quantization coding context-adaptive codec

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A BTC-COMPRESSED DOMAIN INFORMATION HIDING METHOD BASED ON HISTOGRAM MODIFICATION AND VISUAL CRYPTOGRAPHY

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INTERNATIONAL JOURNAL OF INNOVATIVE COMPUTING INFORMATION AND CONTROL 2016年第2期12卷 395-405页

作者： Fan, Hang-Yu Lu, Zhe-Ming Zhejiang Univ Sch Aeronaut & Astronaut 866 Yuhangtang Rd Hangzhou 310058 Zhejiang Peoples R China

This paper presents an information hiding method in the BTC-compressed domain based on histogram modification and visual cryptography. By using the visual cryptography algorithm, the secret image is divided into several transparencies, which are called shared images. Then, one shared image is embedded into the BTC-compressed data through histogram modification which is a reversible information hiding algorithm. When there is any need to recover the secret image, the shared image which formerly embedded into the BTC-compressed data can be extracted. Stacking the embedded shared image and the shared image we have already known, the secret image can be recovered. Experimental results demonstrate the feasibility of the proposed method, and the tampering location ability is quite good.

关键词： block truncation coding Histogram modification Visual cryptography Reversible information hiding

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Improved block truncation coding using Optimized Dot Diffusion

Improved Block Truncation Coding using Optimized Dot Diffusi...

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International Symposium on Circuits and Systems Nano-Bio Circuit Fabrics and Systems (ISCAS 2010)

作者： Guo, Jing-Ming Liu, Yun-Fu Natl Taiwan Univ Sci & Technol Dept Elect Engn Taipei Taiwan

ISBN: (纸本)9781424453092

block truncation coding (BTC) has been considered as a highly efficient compression technique for decades. However, the annoying blocking effect and false contour under low bit rate configuration are its key problems. In this work, an improved BTC, namely Dot-Diffused BTC (DDBTC), is proposed to solve these problems. On one hand, the DDBTC can provide excellent processing efficiency by exploiting the innate parallelism advantage of dot diffusion. On the other hand, the DDBTC can provide excellent image quality by co-optimizing the class matrix and diffused matrix of the dot diffusion. The experimental results demonstrate that the proposed DDBTC is fully superior to the pervious Error-Diffused BTC (EDBTC) in terms of image quality and processing efficiency, and has much better image quality than that of the Ordered-Dither BTC (ODBTC).

关键词： block truncation coding dot diffusion digital halftoning image compression error diffusion ordered dithering

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A secure removable visible watermarking for BTC compressed images

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MULTIMEDIA TOOLS AND APPLICATIONS 2015年第6期74卷 1725-1739页

作者： Yang, Hengfu Yin, Jianping Natl Univ Def Technol Sch Comp Changsha 410073 Hunan Peoples R China Hunan First Normal Univ Dept Informat Sci & Engn Changsha 410205 Hunan Peoples R China

A novel removable visible watermarking (RVW) algorithm by combining block truncation coding (BTC) and chaotic map (RVWBCM) is presented in this paper. It embeds a visible watermark in the BTC codes of images, namely both the host image and the watermarked image are BTC compressed images. First, the original image is divided into watermarked region and non-watermarked region, and a predicted version of original image can be obtained by predicting pixel values in watermarked region. Second, adaptive embedding factors are computed according to the image features. Third, the watermark is adaptively embedded into two quantization levels of the BTC compressed image in visible manner. Meanwhile, to further prevent illegal watermark removal, original bi-level watermark is encrypted and then losslessly embedded in invisible manner by adjusting the relationship of two quantization levels. At the receiver's end, only authorized users can exactly extract original bi-level watermark according the relationship of two quantization levels of BTC codes and succeed in remove the embedded visible watermark to reconstruct the original image. The experimental results show that this scheme can achieve a good balance between perceptual transparence and the watermark strength (watermark visibility) and can resist common image processing attacks. The proposed algorithm has low complexity and simplicity of implementation due to the use of BTC. It can be applicable to copyright notification and secure access control in mobile communication.

关键词： Removable visible watermark block truncation coding Chaotic maps Image smoothness

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A novel reversible data hiding scheme based on AMBTC compression technique

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MULTIMEDIA TOOLS AND APPLICATIONS 2015年第11期74卷 3823-3842页

作者： Lin, Chia-Chen Liu, Xiao-Long Tai, Wei-Liang Yuan, Shyan-Ming Providence Univ Dept Comp Sci & Informat Management Taichung Taiwan Natl Chiao Tung Univ Dept Comp Sci Hsinchu Taiwan Chinese Culture Univ Dept Informat Commun Taipei Taiwan

Data hiding encompasses a wide range of applications for embedding messages in content. However, hiding data inevitably destroys the host image, even though the distortion is imperceptible. To enhance the hiding capacity and maintain the quality of the host image after embedding hidden data, in this paper, we present a high payload reversible data hiding scheme that is based on the absolute moment block truncation coding (AMBTC) compression domain. We explore the redundancy in a block of AMBTC-compressed images to determine if a block is embeddable or non-embeddable. Next, we create four disjoint sets for embeddable blocks to embed data using different combinations of the mean value and the standard deviation. Performance comparisons with other BTC-based schemes are provided to demonstrate the superiority of the proposed scheme.

关键词： Reversible data hiding block truncation coding AMBTC Watermarking

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Mean Square Error Minimization Using Interpolative block truncation coding Algorithms

Mean Square Error Minimization Using Interpolative Block Tru...

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2010 2nd International Conference on Education Technology and Computer(第二届IEEE教育技术与计算机国际会议 ICETC 2010)

作者： Elghanai.M.Rhoma Abdosllam.M.Abobaker Communication Engineering Department Higher Institute of Electronics Bani Waleed Libya

block truncation coding (BTC) is one of spatial coding techniques of images. This technique has a simple and fast algorithm which achieves constant bit rate of 2 bits per pixel. The compression ratio may be improved by coding only half of the bits in the BTC bit plane of each block;the other half will be interpolated at the receiver. The resulting bit rate will be 1.5 bits per pixel. In this paper, two proposed interpolative algorithms for coding the block truncated image bit plane are presented. Several grey scale test images are used to evaluate the coding efficiency and performance of these algorithms compared with existing algorithms. It is generally shown that the proposed algorithms give better results.

关键词： image coding block truncation coding interpolative BTC coding image processing

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Improved Vector Quantization Based block truncation coding Using Template Matching and Lloyd Quantization

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 2009年第12期E92A卷 3369-3371页

作者： Jung, Seung-Won Yoon, Yeo-Jin Nam, Hyeong-Min Ko, Sung-Jea Korea Univ Dept Elect Engn Seoul 136701 South Korea

block truncation coding (BTC) is an efficient image compression algorithm that generates a constant output bit-rate. For color image compression, vector quantization (VQ) is exploited to improve the coding efficiency. In this letter, we propose ail improved VQ based BTC (VQ-BTC) algorithm using template matching and Lloyd quantization (LQ). The experimental results show that the proposed method improves the PSNR by 0.9 dB in average compared to the conventional VQ-BTC algorithms.

关键词： block truncation coding template matching Laplacian distribution Lloyd quantization

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