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Related Concept Videos

Stereoisomers02:32

Stereoisomers

On the basis of mirror symmetry, stereoisomers of an organic molecule can be further classified into diastereomers and enantiomers. Diastereomers are stereoisomers that are not mirror images of each other. Substituted alkenes, such as the cis and trans isomers of 2-butene, are diastereomers, as these molecules exhibit different spatial orientations of their constituent atoms, are not mirror images of each other, and do not interconvert. Here, the interconversion is suppressed due to restricted...
Stereoisomerism02:52

Stereoisomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Stereoisomerism of Cyclic Compounds02:33

Stereoisomerism of Cyclic Compounds

In this lesson, we delve into the role of ring conformation and its stability, which determines the spatial arrangement and, consequently, the molecular symmetry and stereoisomerism of cyclic compounds. 1,2-Dimethylcyclohexane is used as a case study to evaluate the possible number of stereoisomers. Here, given the multiple (n = 2) chiral centers, there are 2n = 4 possible configurations that lack a plane of symmetry, as the ring skeleton exists in a non-planar chair conformation. In addition,...
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next sampling...
Masking and Demasking Agents01:19

Masking and Demasking Agents

EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on the metal...

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Related Experiment Video

Updated: Jun 26, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
11:34

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

Published on: December 3, 2013

A high capacity 3D steganography algorithm.

Min-Wen Chao1, Chao-hung Lin, Cheng-Wei Yu

  • 1Computer Graphics Group, Visual System Laboratory, Department of Computer Science and Information Engineering, National Cheng-Kung University, Tainan, Taiwan, R.O.C. cvivians@hotmail.com

IEEE Transactions on Visualization and Computer Graphics
|January 17, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces a novel 3D steganography method for embedding secret messages in 3D models. The technique offers high capacity and low distortion, outperforming existing approaches.

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Last Updated: Jun 26, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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Published on: December 3, 2013

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Area of Science:

  • Computer Science
  • Information Security
  • Digital Forensics

Background:

  • Steganography is crucial for secure data hiding.
  • Existing 3D steganography methods face challenges in balancing capacity, distortion, and security.
  • Embedding data within 3D models offers a unique approach to covert communication.

Purpose of the Study:

  • To develop a high-capacity, low-distortion 3D steganography scheme.
  • To enhance the security of secret message embedding in 3D polygon models.
  • To offer a superior alternative to current state-of-the-art 3D steganography techniques.

Main Methods:

  • A novel multilayered embedding scheme is proposed.
  • Secret messages are hidden within the vertices of 3D polygon models.
  • The method utilizes multiple layers for data embedding to optimize capacity and minimize distortion.

Main Results:

  • The proposed 3D steganography scheme achieves very high data hiding capacity.
  • Experimental results demonstrate very low distortion in the cover model, even with 7 to 13 embedding layers.
  • The approach meets essential requirements for low distortion and security in 3D model steganography.

Conclusions:

  • The novel multilayered embedding scheme provides significantly higher hiding capacity compared to existing methods.
  • The technique successfully maintains low distortion and high security for steganography on 3D models.
  • This approach represents a significant advancement in the field of 3D steganography.