TAILIEUCHUNG - Adaptive reversible data hiding with pyramidal structure

In this paper, we propose an adaptive algorithm for reversible data hiding by employing the characteristics and pyramidal relationships of original images. The major goal of reversible data hiding is to keep the reversibility of algorithm. | Vietnam J Comput Sci 2014 1 179-191 DOI s4O595-014-0020-y REGULAR PAPER Adaptive reversible data hiding with pyramidal structure Yuh-Yih Lu Hsiang-Cheh Huang Received 30 November 2013 Accepted 26 March 2014 Published online 24 April 2014 The Author s 2014. This article is published with open access at Abstract In this paper we propose an adaptive algorithm for reversible data hiding by employing the characteristics and pyramidal relationships of original images. The major goal of reversible data hiding is to keep the reversibility of algorithm. By use of the pyramidal structure to explore the inherent characteristics of original images regions with different smoothness levels can be determined and then data hiding can be performed adaptively with the pre-determined threshold for balancing the output image quality and embedding capacity. On the one hand larger capacity can be hidden into smoother regions with limited degradation of output image quality. On the other hand the size of location map which serves as the side information for keeping reversibility can be reduced for embedding into smoother or less smooth regions of original image. By carefully manipulating difference values between layers in pyramidal structure secret information can effectively be embedded. With our method we observe better performances over relating methods with enhanced image quality the more embedding capacity and comparable amount of side information for decoding. More importantly the reversibility of our method is guaranteed meaning that original image and secret information can both be perfectly recovered at the decoder. Simulation results demonstrate that proposed method in this paper outperforms those in conventional algorithms. . Lu Minghsin University of Science and Technology Xinxing Rd. Xinfeng Hsinchu 30401 Taiwan . e-mail yylu@ . Huang B National University of Kaohsiung No. 700 University Road Kaohsiung 811 Taiwan .

• Cơ sở dữ liệu
• Reversible data hiding
• Pyramidal structure
• Image quality
• Original images
• Data hiding
• Pixel value ordering
• Pixel prediction
• Reversible data hiding method based
• GePVO K method
• Embedding capacity
• Distortion drift
• Histogram shifting
• Reversible data hiding in H 264/AVC
• Difference expansion
• Multiple bit planes
• Stego image
• High embedding capacity
• Predictive coding
• báo cáo khoa học
• báo cáo hóa học
• công trình nghiên cứu về hóa học
• tài liệu về hóa học
• cách trình bày báo cáo
• International Journal of computer science & communication networks
• Analysis of data hiding with ads in NTFS
• Data hiding with ads in NTFS
• The NTFS file system
• Alternate data stream
• Journal of Science and Technology
• A geometrical robust image data hiding scheme
• On contourlet transform
• Multiple embedded stages
• Contourlet transform hiding algorithm
• Grayscale image
• Hiding scheme
• Fuzzy approach
• New data hiding scheme
• Finite automata technique
• Privacy preserving data ming
• Association rule hiding
• Side effects
• Distortion based method
• Sensitive association rule hiding
• DNA sequence
• Complementary table
• Submission method
• Data concealment in DNA sequences
• Joint data hiding and compression scheme
• SMVQ and image inpainting
• Compression techniques like vector quantization
• Match vector quantization
• công nghệ thông tin
• tin học
• mạng máy tính
• virus
• internet
• Object Oriented Programming
• Visibility scope
• Constructor overloading
• Order of initialization
• Java classes
• Lecture Introduction to Programming
• Bài giảng Nhập môn lập trình
• Introduction to Programming
• Friend function
• Straight line
• Public interface
• Initializer list