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Digital geometric methods in image analysis and compression [chapter]

Ari Gross, Longin Latecki
1997 Lecture Notes in Computer Science  
Although the focus of this paper is developing digital geometric models and methods for finding regular structure in digital document images, the applicability of the digital geometric approach is also  ...  One of the important problems related to image analysis and compression is finding repeated structure.  ...  This measure is compared to the standard bidirectional Hausdorff distance used in document image analysis.  ... 
doi:10.1007/3-540-63930-6_120 fatcat:jhndcde6yze5hmjq2twlflyiym

Analysis of Compression Ratio of Various Randomly Generated Images of Same Size

Tanvir Prince
2017 Journal of Mathematics Research  
Various randomly generated images of size are created and compressed using the standard TIF compression and their compression ratio are analyzed.  ...  TIF compression is used to preserve the original file size. This method is applied for various values of and.  ...  In addition, we would like to acknowledge Dr. Nieves Angulo for her support and contribution towards the project.  ... 
doi:10.5539/jmr.v9n4p114 fatcat:bpsrh4hptbbc5mnyiubebw3enq

Mitigation of Geometrical Attack in Digital Image Watermarking using Different Transform Based Functions

The digital watermarking techniques provide copyright protection and increase the value of brands — Watermarking techniques used in various fields such as image, video, audio, and text.  ...  The prevention of watermarking techniques against the Geometrical attacks is a big challenge for the researcher in the field of digital watermarking.  ...  1  The Intra Prediction Mode chosen in 4x4 Luminnance Block  Digital Watermarking [22] SVD 99 1  The problem of geometric and non-geometric attacks.  ... 
doi:10.35940/ijitee.g5975.078919 fatcat:gcy6g7hpkvhs7hyrg63yjptvv4

WDFB Digital Watermarking Method Based on Multiscale Geometrie Analysis

Gui Ming Shao, Zhi Hua Hu
2012 Advanced Engineering Forum  
WDFB transform a new image analysis method is proposed for the lack of wavelet transform, but the watermarking method that there exist inadequacies; on the one hand, the need to use the original extract  ...  Combined with the human visual system and proposes a digital watermarking algorithm based WDFB domain.  ...  Algorithm Principle Compared with the classical wavelet transform, transform these areas in the image compression and demising WDFB show some advantages and potential, but also in the digital watermark  ... 
doi:10.4028/ fatcat:zzjc5qlpnbbuzduxbaze2oamry

A Robust Image Watermarking Scheme Based Multiresolution Analysis

N. Mohananthini, G. Yamuna
2012 International Journal of Image Graphics and Signal Processing  
In the proposed method, the watermark as well as the cover image seldom looses the quality in both embedding and extraction process.  ...  This scheme shows good performance on different types of cover images in terms of imperceptibility and resist to jpeg compression. .  ...  The proposed method has high robustness to geometric (histogram equalization and rotation), non geometric (filtering, lossy compression and noise adding) and common image processing attacks (sharpening  ... 
doi:10.5815/ijigsp.2012.11.02 fatcat:jtnskkxqpng5pjdthmqzllzpfi


2019 Periódico Tchê Química  
The method of digital image processing can be applied to the analysis of shock waves during the flow around a supersonic stream of bodies with a "blunt" end.  ...  image intensity in photographs.  ...  CONCLUSIONS: The analysis of video frames of the shock waves interaction was made using the method of digital image processing by the parameter image intensity.  ... 
doi:10.52571/ptq.v16.n33.2019.556_periodico33_pgs_541_548.pdf fatcat:jug3oepofbekbhejejrlgqzjgi

Digital element simulation of aligned tows during compaction validated by computed tomography (CT)

Z. Yousaf, P. Potluri, P.J. Withers, D. Mollenhauer, E. Zhou, S. Duning
2017 International Journal of Solids and Structures  
In the present work, the aligned fibre tows in a dry plain woven glass fabric are simulated by digital element method.  ...  The evolution of mesoscale geometrical features such as tow area, thickness, width and waviness has been quantified using high quality CT images.  ...  Acknowledgements The authors acknowledge the support of the Henry Moseley X-ray Imaging Facility which was funded by the EPSRC under EP/F007906, EP/I02249X, EP/J021229/1 with additional support from the  ... 
doi:10.1016/j.ijsolstr.2017.05.044 fatcat:q35arqtywzgc7livkyaxg5qfem

Robust watermarking algorithm for medical images based on log-polar transform

Tianfu Li, Jingbing Li, Jing Liu, Mengxing Huang, Yen-Wei Chen, Uzair Aslam Bhatti
2022 EURASIP Journal on Wireless Communications and Networking  
AbstractIn the information age, network security has gradually become a potentially huge problem, especially in the medical field, it is essential to ensure the accuracy and safety of images, and patient  ...  In the process of feature extraction and watermark embedding, the proposed algorithm reflects the characteristics of LPT, scale invariance and rotation invariance, and retains the advantages of DCT's ability  ...  Jing.L and UAB contributed significantly to analysis and manuscript preparation. TL performed the data analyses and wrote the manuscript. YC helped perform the analysis with constructive discussions.  ... 
doi:10.1186/s13638-022-02106-6 fatcat:eouin45cavcy5faqorjupkiinq

Watermarking Schemes for High Security with Applications and Attacks: Research Challenges and Open Issues

2019 International journal of recent technology and engineering  
Recently, the growth of the internet is increased day by day also the digital data such as videos, images and audio availability to the public get increased rapidly.  ...  In this review an effort is made to explore various aspects of watermarking, algorithms used, and to carry out a comparative study of these techniques based on their classifications.  ...  , Kerala affiliated to KTU, who offered a chances and resources for carrying out this research and for the liberal grants extended to the research activities.  ... 
doi:10.35940/ijrte.d7161.118419 fatcat:bpxn3nevpngpxfq2ydixj4fbt4

Robust Image Watermarking Theories and Techniques: A Review

Hai Tao, Li Chongmin, Jasni Mohamad Zain, Ahmed N. Abdalla
2014 Journal of Applied Research and Technology  
This paper reviews the theoretical analysis and performance investigation of representative watermarking systems in transform domains and geometric invariant regions.  ...  , transmitting and processing information encoded in systems where digital content can easily be disseminated through communication channels?  ...  In addition, digital watermarking is described as an efficient method for the protection of ownership rights of digital audio, image, video and other data types.  ... 
doi:10.1016/s1665-6423(14)71612-8 fatcat:auyjvhohajg2tmlphnouehkd2q

A Survey on Digital Image Copy-Move Forgery Localization Using Passive Techniques

Weijin Tan, Yunqing Wu, Peng Wu, Beijing Chen
2019 Journal of New Media  
In addition, the strengths and weaknesses of these methods are compared and analyzed in robustness and computational cost. Finally, further research directions are discussed.  ...  Digital images can be tampered easily with simple image editing software tools. Therefore, image forensic investigation on the authenticity of digital images' content is increasingly important.  ...  This method is robust against noise and JPEG compression attacks. 2) DWT: Discrete wavelet is broadly applied in various fields of image processing and image analysis for the time-frequency localization  ... 
doi:10.32604/jnm.2019.06219 fatcat:5xmng52xh5ey5ksq2i4aa4e7ym

A Digital Watermarking Algorithm Based on Wavelet Packet Transform and RBF Neural Network

Poorvi Saxena, Murlidhar Vishwakarma
Our evolution process shows better result in compression of transform based digital water marking technique.  ...  The RBF neural network trained the pattern of digital image pixel and finally embedded the image. The processes of validation of blindness of digital image apply some geometrical attack.  ...  robustness and perceptivity. [11] Proposed a method for Color Image Copyright Protection Digital Watermarking Algorithm Based on DWT & DCT in this technique authors describe a removal of geometrical attack  ... 
doi:10.24297/ijct.v10i7.7030 fatcat:ovzksg6cknhqrcgvxoajst3cxe

A Zero-watermarking Scheme based on LPM and Holographic

De Li, Lu Yan Qiao, JongWeon Kim
2014 International Journal of Security and Its Applications  
It not only can effectively resist the noise, cropping, JPEG compression and other conventional attacks, but also can effectively resist geometric attacks such as rotation, scaling.  ...  In this paper, we first use discrete cosine transform into the original image, then do edge detection for the low frequency part, then do log-polar transform to edge image and make it binarization.  ...  Acknowledgements This research project was supported by the Ministry of Culture, Sports and Tourism (MCST) and the Korea Copyright Commission in 2014.  ... 
doi:10.14257/ijsia.2014.8.6.09 fatcat:lqaiqbm4hfb2rmo3mej7vqaoci

Teaching multimedia

Iliya Georgiev
2003 Proceedings of the 4th international conference conference on Computer systems and technologies e-Learning - CompSysTech '03  
Teaching and learning multimedia basics are relevant to a diversity of scientific areas: signals and systems, data compression, computer graphics, image processing and understanding, digital audio and  ...  Multimedia processing is becoming mainstream in today's computing environment.  ...  By using the model we present the representatives methods of lossless compression of text, and lossy compression of audio, speech, images and video.  ... 
doi:10.1145/973620.973721 fatcat:7uhoirls4fhr3mvagsvktkiewa

An Analysis on Digital Watermarking in Videos based on Frequency Domain Techniques

Monasa Yengkhom, Pradeep Kumar Singh
2015 International Journal of Modern Education and Computer Science  
The attacks may include image processing attacks like compression, frame dropping, piracy, geometric distortions, loss of quality, etc.  ...  So, most researchers have used this domain in developing a good watermarking scheme for achieving robustness and other important properties of digital watermarking against all kinds of intentional and  ...  [38] , proposed a novel digital watermarking techniques against the geometric attacks in context to images.  ... 
doi:10.5815/ijmecs.2015.12.05 fatcat:7nyyrqor4naujlu2obwxab26ae
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