Holographic data compression

  • Does holographic data storage exist?

    Holographic memory devices offer up to 1 gigabyte per second.
    High capacities.
    Holographic storage devices have a potential storage capacity of about 1 terabyte of data per square inch..

  • How does hologram technology work?

    Holography is a unique method of photography whereby .

    1. D objects are recorded using a laser and then restored as precisely as possible to match the originally recorded object.
      2. When illuminated via a laser, holograms are able to form an exact .
    2. D clone of the object and duplicate its features

  • How does holographic storage store data?

    Holographic optical storage systems store data by recording the interference between the wave-fronts of a modulated optical field, containing the data, and a reference optical field, as a refractive index variation inside the storage media..

  • How is holography used in archiving?

    How Does Holographic Storage Work? In holographic storage, a light field is produced by a laser source that illuminates both the object and the recording media.
    The scattered light from the object interferes with the reference light, creating a subsequent interference pattern that produces the image..

  • What are the advantages of holographic data storage?

    Benefits of Holographic Storage
    This allows the distribution of dense data that cannot be easily sent across other networks such as broadcast or high-definition video.
    Holography and holographic storage is also appealing for short term backups and archives.
    Companies are beginning to rely less and less on tape backups..

  • What is a holographic memory?

    A storage device that records binary information in the form of holograms, which are produced (as interference patterns) on photographic or photochromic media by means of laser beams, and are read by means of low-power laser beams..

  • What is meant by holographic data storage?

    Holographic storage is computer storage that uses lasers to store computer-generated data in three dimensions.
    Holographic storage -- also called holostorage, three-dimensional (.

    1. D) storage or a holographic data storage system (HDSS) -- is a volumetric storage system

  • Disadvantages of holographic data storage:
    Limited shelf life or blank holographic media, behaving more like unexposed photographic paper, which ultimately decreases the archival value.
    Technological differences between holographic data storage and other storage options make them incompatible.
  • Holographic storage systems are a rewritable, high-density, high-speed optical information storage medium.
    Holographic storage is capable of recording and reading data from the storage medium in parallel, which results in higher overall throughput.
  • This technique is used to perform imaging of multidimensional objects.
    Holography uses hardware, software and more exotic types of programming to create hologram image.
    This technology records light scattered from an object to present it in a .
    1. D digital image
A typical image compression scheme incorporates three fundamentals steps: transformation, quantization, and entropy coding. Indeed, the JPEG 2000 image coding 
Clearly, efficient compression of holographic visual information is a critical aspect. Given that the signal properties of holograms differ significantly from 

How do holographic compression methods adapt to a heterogeneous context?

Adapt to the context:

  1. with the emergence of holographic technology
  2. the embedding of holographic data inside Web applications is a new challenge; the visualization of digital holograms through handheld devices is also emerging

Consequently, compression methods have to adapt to this heterogeneous context by presenting different settings.
,

What is digital hologram compression?

Compression of digital holograms allows one to store, transmit, and reconstruct large sets of holographic data.
There are many digital image compression methods, and usually wavelets are used for this task.
However, many significant specialties exist for compression of digital holograms.

,

What is phase shifting digital holographic data compression?

Phase-shifting digital holographic data compression Abstract Modern holography for 3D imaging allows to reconstruct all the parallaxes that are needed for a truly immersive visualization.
Nevertheless, it possesses huge amount of data which induces higher transmission and storage requirements.

,

Why is holographic data compressed so well?

This is mainly due to the fact that the way holographic data are generated, reconstructed, and represented has a great impact on how well it will be compressed.
Most of the compression works, discussed above, are not strictly comparable due to the complicated system of PSDH.

Hologram Generation and Reproduction

Holograms are recorded under a coherent beam of light and saved on a physical recording medium. A traditional set-up involves the recording medium

Digital Holography

Digital holograms have the similar set-up as optical hologram generation

Representation Formats of Computer-Generated phase-shifting Holograms

According to the PSDH principle, and considering Eq. 16

How to compress digital holograms?

There are many digital image compression methods, and usually wavelets are used for this task

However, many significant specialties exist for compression of digital holograms

As a result, it is preferential to use a set of methods that includes filtering, scalar and vector quantization, wavelet processing, etc

Is holographic data representation and compression a problem?

In this book, we specifically consider the problem of representation and compression of holographic data

Indeed, digital holographic data represents a huge amount of information which has to be efficiently handled

In addition, a very high data rate is needed for a real-time system

These two drawbacks constitute major bottlenecks

What compression strategies are used in phase-shifting digital holograms?

In the case of phase-shifting digital holograms, three main compression strategies are used: interference patterns compression, camera plane compression and compression at the reconstruction plane

By using the first category, each of the three recorded interference patterns \ (I_ {\mathrm {H}} (:,:,\phi )\) is individually compressed


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