Related Experiment Video
Updated: Jul 25, 2025
05:54
Author Spotlight: Non-Invasive Imaging of Complex Bio-Structures Using Polarization-Sensitive Two-Photon Microscopy
Published on: September 8, 2023
1.2K
Underwater active polarization descattering based on a single polarized image
Optics Express
|June 29, 2023
Summary
This study introduces a novel active polarization imaging method that reconstructs cross-polarized images from a single co-polarized input. This technique enhances underwater imaging efficiency and contrast, even in turbid conditions.
Area of Science:
- Optics and Photonics
- Underwater Imaging
- Polarization Imaging
Background:
- Active polarization imaging is crucial for underwater applications.
- Current methods require multiple polarization images, limiting applicability.
- A need exists for simplified, efficient polarization imaging techniques.
Purpose of the Study:
- To develop a single-input active polarization imaging method.
- To reconstruct cross-polarized images using co-polarized data.
- To improve image contrast and noise estimation in underwater environments.
Main Methods:
- Introduced an exponential function to reconstruct cross-polarized images from co-polarized images.
- Established a relationship for the degree of polarization (DOP) for backscattered light.
- Utilized single-input imaging to simplify the experimental process.
Main Results:
- Achieved a more uniform and continuous grayscale distribution compared to traditional methods.
- Enabled accurate estimation of backscattered noise.
- Produced high-contrast restored images suitable for various turbidities.
- Demonstrated advancement for objects with high polarization.
Conclusions:
- The proposed single-input method significantly advances active polarization imaging for underwater applications.
- The technique offers improved efficiency and image quality in challenging underwater conditions.
- This approach simplifies experiments and broadens the scope of polarization imaging.
Related Concept Videos
01:29Potential Due to a Polarized Object
442
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
442
01:20¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
1.1K
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...
1.1K
01:01Group Polarization
34.4K
Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
34.4K
01:15Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)
410
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
410
01:31Dielectric Polarization in a Capacitor
4.8K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
4.8K