Related Experiment Video
Updated: Jul 4, 2026
08:39
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
Published on: January 28, 2019
Accurate phase-added stereogram to improve the coherent stereogram
Hoonjong Kang1, Takeshi Yamaguchi, Hiroshi Yoshikawa
1Department of Electronics and Computer Science, Nihon University, Funabashi, Chiba, Japan. hoonjongkang@hotmail.com
Applied Optics
|July 3, 2008
Summary
We introduce an improved phase-added stereogram technique. By using larger macroblocks, this method reduces quantization errors, enhancing reconstructed image quality for clearer visuals.
Area of Science:
- Digital image processing
- Holography
- Computer vision
Background:
- Phase-added stereograms are used for 3D image reconstruction.
- Conventional methods use macroblocks matching segmentation size, leading to quantization errors.
Purpose of the Study:
- To propose an improved phase-added stereogram technique.
- To reduce quantization errors in the spatial frequency domain.
- To enhance the quality of reconstructed images.
Main Methods:
- Implementing a phase-added stereogram with larger macroblock sizes than conventional methods.
- Utilizing the fast Fourier transform for calculations.
- Reducing quantization error in discrete spatial frequencies.
Main Results:
- The proposed method successfully reduces quantization error.
- Image reconstruction quality is significantly improved.
- The clarity of reconstructed images approaches that of Fresnel holograms.
Conclusions:
- The "accurate" phase-added stereogram offers superior image reconstruction quality.
- Larger macroblock sizes are effective in minimizing spatial frequency domain errors.
- This technique provides a clearer alternative for 3D image display.
Related Concept Videos
01:26Phase Contrast and Differential Interference Contrast Microscopy
Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
02:32Stereoisomers
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...
01:19Phase Changes
Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
02:52Stereoisomerism
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...
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...
01:19Phase Diagram
The phase of a given substance depends on the pressure and temperature. Thus, plots of pressure versus temperature showing the phase in each region provide considerable insights into the thermal properties of substances. Such plots are known as phase diagrams. For instance, in the phase diagram for water (Figure 1), the solid curve boundaries between the phases indicate phase transitions (i.e., temperatures and pressures at which the phases coexist).