Visible Reversible Watermarking for 3D Models Based on Mesh Subdivision

2021 ◽  
pp. 136-149
Author(s):  
Fei Peng ◽  
Wenjie Qian ◽  
Min Long
Keyword(s):  
3D Models ◽  
Reversible Watermarking

scholarly journals Homomorphic Encryption-Based Robust Reversible Watermarking for 3D Model

Symmetry ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 347 ◽  
Author(s):  
Li Li ◽  
Shengxian Wang ◽  
Shanqing Zhang ◽  
Ting Luo ◽  
Ching-Chun Chang
Keyword(s):  
3D Model ◽  
Homomorphic Encryption ◽  
Three Dimensional ◽  
3D Models ◽  
Reversible Watermarking ◽  
Histogram Shifting ◽  
Watermark Embedding ◽  
Paillier Cryptosystem ◽  
Embed Watermark

Robust reversible watermarking in an encrypted domain is a technique that preserves privacy and protects copyright for multimedia transmission in the cloud. In general, most models of buildings and medical organs are constructed by three-dimensional (3D) models. A 3D model shared through the internet can be easily modified by an unauthorized user, and in order to protect the security of 3D models, a robust reversible 3D models watermarking method based on homomorphic encryption is necessary. In the proposed method, a 3D model is divided into non-overlapping patches, and the vertex in each patch is encrypted by using the Paillier cryptosystem. On the cloud side, in order to utilize addition and multiplication homomorphism of the Paillier cryptosystem, three direction values of each patch are computed for constructing the corresponding histogram, which is shifted to embed watermark. For obtaining watermarking robustness, the robust interval is designed in the process of histogram shifting. The watermark can be extracted from the symmetrical direction histogram, and the original encrypted model can be restored by histogram shifting. Moreover, the process of watermark embedding and extraction are symmetric. Experimental results show that compared with the existing watermarking methods in encrypted 3D models, the quality of the decrypted model is improved. Moreover, the proposed method is robust to common attacks, such as translation, scaling, and Gaussian noise.

THE GENESIS OF TOOLS FOR TEACHING PUPILS TO DEVELOP FLOWCHARTS

2020 ◽  
pp. 11-15
Author(s):  
A. A. Zubrilin ◽  
M. N. Makarov
Keyword(s):  
Historical Perspective ◽  
3D Models ◽  
Computer Applications ◽  
Internet Services

The historical perspective provides an overview of how to study flowcharts in a school informatics course. Computer applications and Internet services are considered that automate the development of flowcharts. It is shown how 3D technologies can help an informatics teacher in preparing 3D models for the study of flowcharts.

Automatic generation of bas-relief on 3D models based on 2D images for rhinoceros

2018 ◽  
Vol 23 (6) ◽  
pp. 99-113
Author(s):  
Sha LIU ◽  
Feng YANG ◽  
Shunxi WANG ◽  
Yu CHEN
Keyword(s):  
3D Models ◽  
Automatic Generation ◽  
2D Images

A High Performance Reversible Watermarking Scheme Based on Histogram Shifting

2012 ◽  
Vol 38 (1) ◽  
pp. 88-96 ◽  
Author(s):  
Jun-Xiang WANG ◽  
Jiang-Qun NI ◽  
Jin-Wei PAN
Keyword(s):  
High Performance ◽  
Reversible Watermarking ◽  
Histogram Shifting ◽  
Watermarking Scheme

Feasibility of the Use of 3D Models to Improve Regional Locations in W. China, Central Asia, and Parts of the Middle East

2002 ◽  
Author(s):  
Michael H. Ritzwoller ◽  
Nikolai M. Shapiro ◽  
Anatoli L. Levshin ◽  
Eric A. Bergman ◽  
Eric R. Engdahl
Keyword(s):  
Middle East ◽  
Central Asia ◽  
3D Models

Complex 3D Models to Study Drug Targeting of Invadopodia

2014 ◽  
Vol 1 (2) ◽  
pp. 85-5 ◽  
Author(s):  
Njainday Jobe ◽  
Daniel Rosel ◽  
Ondrej Tolde ◽  
Jan Kosla ◽  
Jan Brabek
Keyword(s):  
Drug Targeting ◽  
Study Drug ◽  
3D Models
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