This document discusses regenerating an original hologram from a slice of the hologram. It begins with an introduction to holography, including how holograms are recorded and reconstructed. It then discusses the history of holography and the fringe structure and shape that results from the interference pattern. The document focuses on how the original hologram can be regenerated from a small slice by analyzing the number of fringes in the slice and how the parameters like amplitude may change. It concludes that holograms have applications in security, data storage, and medicine and discusses future directions for holography.
Holography is the science and practice of making holograms. Typically, a hologram is a photographic recording of a light field, rather than of an image formed by a lens, and it is used to display a fully three-dimensional image of the holographed subject, which is seen without the aid of special glasses or other intermediate optics.
Holography is the science and practice of making holograms. Typically, a hologram is a photographic recording of a light field, rather than of an image formed by a lens, and it is used to display a fully three-dimensional image of the holographed subject, which is seen without the aid of special glasses or other intermediate optics.
3D holographic projection technology clearly has a big future ahead. 3D Holographic projection is the new wave of technology that will change how we see things in the modern era. Three-dimensional holographic projection technology will have tremendous effects on all fields of life including business, education, science, art, and healthcare.
Hologram
3D Holographic Projection Technology
What is Holography
Why Holography
Types of Holograms
How Holograms work
Recording of hologram
Reconstruction of hologram
Advances in technology
Applications & Future scope
Conclusion
holography technology for the future to lead in the market in the digital world. recent trends and it is attached with a video for good understanding. hope you will like the presentation
PPT on 3D Holographic Projection Technology ( Hologram)SafwanSadi
A PowerPoint presentation consideration of the topic 3D Holographic projection Technology-based on interference fringes recorded on the Holographic plate. The Holographic projection Technology is a versatile topic for engineering or any graduate to be considered or study deep about can explore endless opportunities upcoming in the field of Holographic research or hologram.
3D holographic projection is the technology that records and reproduces objects in a real 3D image. Tremendous effects on all fields of life including business, education, science, art, and healthcare. Holographic projection is a kind of 3D technology without wearing glasses, and viewers can see the three-dimensional virtual character.
ForgetIT: human memory inspired Information ModelPERICLES_FP7
This presentation was delivered by Walter Allasia, Chief Research Officer at EURIX Group during one of the online meetings that took place in the PERICLES Community of Practice (CoP) related to the reuse of science data. This CoP focuses on issues related to the re-use of data in the science domain and brings together scientists, researchers and project managers from leading institutions in Europe to discuss barriers, developments and examples of data management strategies for long-term access.
The presentation covered the Information Model developed by the EU-funded project ForgetIT (2013-2016).
3D holographic projection technology clearly has a big future ahead. 3D Holographic projection is the new wave of technology that will change how we see things in the modern era. Three-dimensional holographic projection technology will have tremendous effects on all fields of life including business, education, science, art, and healthcare.
Hologram
3D Holographic Projection Technology
What is Holography
Why Holography
Types of Holograms
How Holograms work
Recording of hologram
Reconstruction of hologram
Advances in technology
Applications & Future scope
Conclusion
holography technology for the future to lead in the market in the digital world. recent trends and it is attached with a video for good understanding. hope you will like the presentation
PPT on 3D Holographic Projection Technology ( Hologram)SafwanSadi
A PowerPoint presentation consideration of the topic 3D Holographic projection Technology-based on interference fringes recorded on the Holographic plate. The Holographic projection Technology is a versatile topic for engineering or any graduate to be considered or study deep about can explore endless opportunities upcoming in the field of Holographic research or hologram.
3D holographic projection is the technology that records and reproduces objects in a real 3D image. Tremendous effects on all fields of life including business, education, science, art, and healthcare. Holographic projection is a kind of 3D technology without wearing glasses, and viewers can see the three-dimensional virtual character.
ForgetIT: human memory inspired Information ModelPERICLES_FP7
This presentation was delivered by Walter Allasia, Chief Research Officer at EURIX Group during one of the online meetings that took place in the PERICLES Community of Practice (CoP) related to the reuse of science data. This CoP focuses on issues related to the re-use of data in the science domain and brings together scientists, researchers and project managers from leading institutions in Europe to discuss barriers, developments and examples of data management strategies for long-term access.
The presentation covered the Information Model developed by the EU-funded project ForgetIT (2013-2016).
Detecting Semantic Drift for ontology maintenance - Acting on Change 2016PERICLES_FP7
This presentation was delivered by Sándor Darányi (University of Borås, Sweden) and Panos Mitzias (CERTH/ITI, Greece) at PERICLES final project conference 'Acting on Change: New Approaches and Future Practices in LTDP' (Wellcome Collection Conference Centre, London, 30 Nov -1 Dec 2016).
This 'PERICLES in practice' session covered the PERICLES approach in addressing evolving semantics and the use of Somoclu and SemaDrift in the detection of drift to alert ontology maintenance and object appraisal by designated workflows.
http://pericles-project.eu
Karanjit Singh, CEO Kellton Tech Solutions Ltd delivers a talk on Digital Transformation at Avenir, DoMS IIT Roorkee
Theme: "Shifting Sands, Insight driven India"
Digital dark age - Are we doing enough to preserve our website heritage?Olivier Dobberkau
While creating web sites we often see their lifespan only for up to 3 to 5 years. With every relaunch
and overhaul we are confronted with content migration and short term motives to delete maybe
valuable content. On the other hand what is the value of our content? Can we assess it
meaningfully? Do we really know in which context it is used?
Scientist stated that where as we are producing more and more digital artifacts we fail to see that
we are not keeping an eye on preserving it in a manner that will enable us to find and use it in more
that a few years in the future.
This talk will introduce you the aspects of digital preservation with a special look on how TYPO3 is
preparing to help it users to create a digital heritage.
This Talk is part of the "Concise Preservation by combining Managed Forgetting and
Contextualized Remembering" Project ForgetIT. The ForgetIT project is funded by the EC within the
7th Framework Programme under the objective "Digital Preservation" (GA 600826).
DIGITAL VIDEO HOLOGRAPHY- A ROBUST TOOL FOR COMMUNICATIONcscpconf
Holograms are being produced using optical methods for decades. A lot of techniques and
methods exist for the production of efficient holograms. Digital Holography (DH) is
the method of simulating holograms with the use of computer. In this paper digital holograms
are generated using Fresnel and Fraunhofer diffraction integrals. Multi color holograms are
simulated and the digitally generated holograms are analysed. DH technique is extended
further to video format which yields video holograms. The concept that every bit of a hologram
contains full information of the original video, which is being effectively utilized to reduce the
file size required for communication in terms of storage, security and speed. The entire process
is simulated using Matlab7.10 environment.
Reversible Watermarking based on Histogram Shifting Modification:A Reviewiosrjce
IOSR Journal of Computer Engineering (IOSR-JCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of computer engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in computer technology. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Feature Based watermarking algorithm for Image Authentication using D4 Wavele...sipij
In this paper we propose a new watermarking schema i.e. the combination of color space and wavelet transform. Watermarking is a technique that authenticates a digital picture by hiding the secret information into the image. Now, a lot of algorithms and methods have been developed for greyscale images but the particularities of color spaces have to be studied. On the other hand, the wavelet transform allows different possibilities of integrating a mark because of the uses of different parameters: the scale of decomposition, size, shape and localisation of the mark, and the used color space, etc. The RGB (Red, Green, and Blue) values of each pixel of the host color image as well as the color key image are converted to HSV (Hue, Saturation, and Value) values. Then the orthogonal D4 Wavelet transform is applied in each plate of host image and key image. Now insert the key component into appropriate blocks of host image’s different plates. The experimental results show the effectiveness of our algorithm.
DESPECKLING OF SAR IMAGES BY OPTIMIZING AVERAGED POWER SPECTRAL VALUE IN CURV...ijistjournal
Synthetic Aperture Radar (SAR) images are inherently affected by multiplicative speckle noise, due to the coherent nature of scattering phenomena. In this paper, a novel algorithm capable of suppressing speckle noise using Particle Swarm Optimization (PSO) technique is presented. The algorithm initially identifies homogenous region from the corrupted image and uses PSO to optimize the Thresholding of curvelet coefficients to recover the original image. Average Power Spectrum Value (APSV) has been used as objective function of PSO. The Proposed algorithm removes Speckle noise effectively and the performance of the algorithm is tested and compared with Mean filter, Median filter, Lee filter, Statistic Lee filter, Kuan filter, frost filter and gamma filter., outperforming conventional filtering methods.
DESPECKLING OF SAR IMAGES BY OPTIMIZING AVERAGED POWER SPECTRAL VALUE IN CURV...ijistjournal
Synthetic Aperture Radar (SAR) images are inherently affected by multiplicative speckle noise, due to the coherent nature of scattering phenomena. In this paper, a novel algorithm capable of suppressing speckle noise using Particle Swarm Optimization (PSO) technique is presented. The algorithm initially identifies homogenous region from the corrupted image and uses PSO to optimize the Thresholding of curvelet coefficients to recover the original image. Average Power Spectrum Value (APSV) has been used as objective function of PSO. The Proposed algorithm removes Speckle noise effectively and the performance of the algorithm is tested and compared with Mean filter, Median filter, Lee filter, Statistic Lee filter, Kuan filter, frost filter and gamma filter., outperforming conventional filtering methods.
Research Inventy : International Journal of Engineering and Scienceresearchinventy
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Holography is a technique that enables a light field (which is generally the result of a light source scattered off objects) to be recorded and later reconstructed when the original light field is no longer present, due to the absence of the original objects.
Applications of holography include information storage, recording of images in depth, the use of holograms as optical elements, and as a means of performing precise interferometric measurements on three-dimensional objects of any shape and surface finish.
SINGLE‐PHASE TO THREE‐PHASE DRIVE SYSTEM USING TWO PARALLEL SINGLE‐PHASE RECT...ijiert bestjournal
Now a days digital image processing is rapid emerging field with fast growing
applications in sciences and engineering technologies. Digital image processing has broad
spectrum of applications such as remote sensing, medical processing, radar, sonar,
robotics, sport field and automated processes [1-2]. Edge detection techniques are
employed for the detecting the edges of the primitive picture. Earlier some primitive
methods were used for the image processing. H. C. Andrew et.al. gave the method of
digital image restoration [3-5], A. K. Jain and et.al put forwarded the partial difference
equations and finite differences in image processing [6]. Image process, image models and
estimation regarding the edge detection has been flourished during last decade [7-9]. Most
modules in practical vision system depend, directly or indirectly, on the performance of an
edge detector and digital image processing.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
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Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
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Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
1. Cognizance
The Technical Extravaganza
18th-20th March, 2016
IIT, ROORKEE
Regenerating original hologram from a slice
Dheeraj, Devanshi Chaudhary
Department of Electronics and Communication Engineering
DIT University Dehradun: 248009, India
yadavdheeraj129@gmail.com,devanshi0114@gmail.com
2. Contents
• Introduction
• Holography?
• History
• Hologram Recording
• Hologram Reconstruction
• Fringe Structure
• Fringe Shape
• Regeneration of Hologram from a slice and parameter affected during change
• Conclusion
• Future of Holography!
• Interested articles on holography
• References
• Feedback and Questions
3. Introduction
• Holography is a 3-D imaging method where the complex light wavefront reflected by
objects is recorded.
• Unlike photography, it records both amplitude as well as phase of the light wave.
• It is simply an interference phenomenon. During the recording process reference beam
and object beam interfere within the recording layer. When the waves interfere we get
the pattern of fringes on the recording media.
• Our work reflects the key idea of regenerating the original hologram from its small part
(slice), the amount of information loss with the area of slice available is also presented.
4. Holography?
• Lens-less imaging process.
• Information about both the
amplitude and phase of the
diffracted or scattered waves can be
recorded.[1]
• It is an encoding of the light field as
an interference pattern of seemingly
random variations in the opacity,
density, or surface profile of the
photographic medium.
• The technique of holography can
also be used to optically store,
retrieve, and process information.
Fig-1(Holography Technology)
5. History
Dennis Gabor (1900–1979), developed holography while working
to improve the resolution of electron microscope. He later received
the Nobel Prize in Physics in 1971.[2]
Produced moving 3-D image.[2]
Developed first laser transmission
hologram of 3-D object (using a toy
train)[2]
Produced a white light hologram.[2]
Fig-2(3-D hologram of train)
6. Hologram Recording
• Interferometry.
Object wave a(x,y) = |a(x,y)| exp[-jФ(x,y)]
Reference wave A(x,y) = |A(x,y)| exp[-jѰ(x,y)]
• On recording media , we get the interference of both wave i.e. object wave and reference
wave.
Mathematically,
I(x,y) = |a(x,y)|2 +|A(x,y)| 2 + 2|a(x,y)||A(x,y)| cos[Ѱ(x,y)-Ф(x,y)]
Fig-3(Recording of hologram)
7. Hologram Reconstruction
• Use reconstruction beam for reconstruction of hologram.
• The hologram acts as a diffraction grating.
• The reconstruction beam after passing through the hologram produces a real as well as
virtual image of the object.
Then on recording medium, we get,
BtA = BtB+ β΄B|a(x, y)|2 + β΄A*Ba(x, y) + β΄ABa*(x, y).
Fourth term, this component is directly proportional to original scattered wave
a*(x , y). It leads to originate real image located at zo from opposite side of object.
Fig-4(Reconstruction of hologram)
8. Fringe Structure
The fringe pattern’s orientation or fringe angle is described by
θf = θobj+ θref/ 2
For 2-D Plane:
Y || S1S2.
S1(0, D) ,S2(0, -D).
where D is the distance between slits
and recording media.
Now, path difference (Δ) will be
S2P – S1P = Δ =
[x2 + (y-d/2)2 + D2]1/2 – [x2 + (y +
d/2)2 +D2]1/2 . [11]
Optical Holography by Robert J. Collier, Christopher B.
Burckhardt, Lawrence H. Lin
Fig-5(YDSE)
9. Fringe Shape
Let us take an isotropic point source .
• Amplitude of wave ‘A’.
• since 3-D plane P(x, y, o), so z-axis = 0
Complex amplitude of a wave
A(r, t) = (a/r)ei(wt-kr)
where, r = (x2+y2+z2)
From the above amplitude equation we observe amplitude decreases as r increases.
[x2 + (y + d/2)2 + D2] = {Δ+[x2+(y-d/2)2 + D2]1/2}2
On solving the above equation we get,
Y= Δ2/(d2-Δ2) [D2 + (d2-Δ2)] ……… (1)
Eq. (1) represents a HYPERBOLA fringes.
*x2<<D2 STRAIGHT LINE
Fig-6(Fringe shape)
10. We can decide number of fringes in a small part of hologram by calculating fringe
width.[12]
• Recording plate of dimension n*n.
• Next, we take a small part of
recording plate of dimension (say)a*a.
• Thereby, we can calculate fringe
width by using formula:
W = λD/2d
(for both bright and dark fringes).
•With the amount of number of
countable integer fringes we can then
estimate the number of fringes in area
a*a and later in whole n*n.
Fringe Count in small part of the hologram
Fig-7(Fringe shape)
11. After finding the change in parameter we can regenerate the hologram from
a slice of a*a dimension without much loss of data.
n
n
a
a
Hologram Regeneration from a slice
12. Hologram Regeneration from a slice
In a small part of area (slice) with dimensions a*a we’re able to detect following:
Fringe count,
Structure & Shape of fringe
Now we can find the change in parameters of hologram when we cut/slice into small
part of dimension a*a from n*n .
The time period of wave remains unaffected. T = 2π/ Ѡ
Hence, frequency remains unaffected.
With established wave number, K= 2π/ λ we find change in amplitude
Complex amplitude of a wave
E(r, t) = (A/r)exp i(wt-kr)
r = (x2+y2+z2)1/2
Amplitude decreases as (1/r) distances of energy conservation .
Where Ʌϕ = ϕ1 – ϕ2
Ʌϕ = 2π/λ (m)λ
Ʌϕ = 2π/λ(m+1/2)λ
Ʌϕ= 2π/ λ* Ʌx=k*Ʌx
Ʌϕ Amplitude wave number
13. Conclusion
In this presentation , we have presented a related key aspect to count number of
fringes in a given holographic recording medium of certain area by assuming a
linear shape of fringes which is obtained when the distance between the recording
medium and the slits is quite long. We regenerate a hologram from a slice of a*a
dimension.
The application of the finding can be stretched out in lossless/lossy coding of data
by saving the data as holograms and further using the dictionary technique to store
the linear interference patterns.
14. Future of Holography!
• Holography as a measure to increase security.
• Pattern recognition.
• Holographic data storage.
• Holographic video game Console.
• Microsoft Hololens.
• Medical
Fig-8(Microsoft Hololens)
Fig-9(Medical holography)
15. Interesting Articles on Holography
• The Brightest, Sharpest, Fastest X-Ray Holograms Yet
• NTT Develops Stamp-Size 1GB Hologram Memory
• Quantum holography system
• Holographic Storage Overview at CNET
• Laser Pointer Holograms
• How Holographic Storage Works
Fig-10(Quantum holography system)
16. References
1. Introduction to Fourier Optics 2nd J.Goodman
2. http://hologram.org/.
3. https://www.youtube.com/watch?v=AXhGfkGh4vM
4. https://www.youtube.com/watch?v=aThCr0PsyuA
5. https://www.youtube.com/watch?v=iaaHcH9nQmI
6. slashdot.org
7. Andrew Chan "Digital hologram".
8. Guy E.blelloch "Introduction to optics."
9. HC-Verma "Concepts of physics volume-1".
10. Tung H.Jeong "Fundamental of photonics"(Module 1.10--Basic principal and application
of holography).
11. E. S. Maniloff, D. Vacar, D. McBranch, et al., OpticalHolography (Academic, New
York, 1971).
12. Huai M. Shang, Cheng Quan, Cho J. Tay, and Yua Y. Hung“Generation of carrier
fringes in holography and shearography”, Vol. 39, Issue 16, pp. 2638-2645 (2000),
doi: 10.1364/AO.39.002638