Its shape to a first approximation is the Fourier transform of the shape of an individual SLM pixel. Side illumination of SLM with free prism and use of total internal reflection [8].
Resistance to local defects and obstructions of the SLM
Improving the quality of holographically projected images 1 Image resolution
Coherent noise in projected images
Experimental measurements of a dot PSF shrunken in the x-direction due to SLM with a synthetic aperture:. a) cross sections; (b) captured intensity fields [17]. The use of complex modulation gives the freedom to adjust the phase state of the displayed field.
Holographic projection in color
- Compensation of the chromaticity of the SLM
- Color holographic projection by time division
- Color holographic projection by spatial division
- Multi-plane color hologram
Resizing and repositioning the input color components allows rapid compensation of the chromaticity of holographic projection: (a) blue component; (b) green component; (c) red component [33]. Spatial breakdown of SLM: simple illumination with three fibers and color filters: (a) optical fibers; (b) SLM;.
Conclusions
The same happens when the spatial frequencies in any of the three images are too high, making the desired light field non-physical. Next-generation SLMs should be "pixel-less", that is, have freedom of placement and shape [48] of light-modulating microareas, and the used medium should not place restrictions on the minimal size and dense packing of such "pixels". The problems that remain to be solved are to find the right medium [49, 50] and the fast and precise method of addressing, writing and erasing it.
Introduction
This technology enables a new line of communication called "holographic telepresence" that delivers a real-time, real-time holographic experience, allowing for more effective connection and impact on audiences. The results showed that it was possible by defining the parameters and a guide for setting up a holographic telepresence.
Pepper’s ghost effect and its evolution
Although in telepresence systems, it is important that the images have a real-world scale. In telepresence systems, the goal is for the user to lose the idea that there are some intermediate devices with many technologies that can act naturally. He considered that the biggest challenge in developing telepresence is achieving that feeling of "being there". According to the company Digital Video Enterprises, telepresence refers to technologies that allow a user to appear present, feel as if they are present, or have some effect in a space that the person does not physically inhabit.
When a light shines on the picture, it will appear as if a ghost is sitting on the table visible to the audience [3]. Holograms have always been an object of fascination for people because they always seem like technology from the future. Although there are already 3D holograms that give a tactile sensation, so far there is no technology that can produce a holographic projection of a person's full body in any location.
Currently, there is a new communication technology in development that will allow people to interact within a controlled simulated environment, even if they are thousands of kilometers apart [2]. Holographic images appear to be three-dimensional and have volume and depth that can be seen with the naked eye [4]. The common images of cinema and television are built on the point of view established by the director: the scene is created and presented through the eyes and point of view of the director.
What is holographic telepresence?
Holography can create an accurate visual simulation, with total parallax: a replica of the real object made of light, which has the visual properties of the real object but is immaterial, intangible. The few spectators of the first 47-second monochromatic holographic film, made in 1976 by Russian scientist Victor Kumar, reported seeing a young woman holding a bouquet of flowers [4].
Defining the problem
Justification
This research seeks to define a configuration and identify and set parameters for remote holographic telepresence communication, and it is justified by the expensive and lit room systems that have been one of the most common deployments of videoconferencing technology in the workplace. These types of setups are still an aspect of the executive conference room that uses the latest video and audio systems that the market has to offer, which leads to a high end budget [18]. Achieving the humanization of virtual remote contact, the stimulation of teamwork and academic collaboration will fundamentally change the way in which people will communicate in the future.
Since it is a communication system, it is logical that the whole process will be direct, so that the interaction and communication channel will be as natural as face-to-face communication holograms [10]. Holographic telepresence combines with special care the technologies that already exist in the environment in which it takes place. The position of the cameras is essential so that the people receiving the transmission can appreciate the dimensions of the real world and ensure continuity where it is projected.
Holographic telepresence can change the way of thinking and experiencing modern communication systems. Flexibility: Now it is possible to set up a video conference over the Internet, make video calls from almost any mobile device. Direct: The camera is usually placed on top of the screen or in the monitor, and when the user is talking to another person, it looks anywhere else, but not in the other user's line of sight.
Defining the problem
Objectives
The motivation of this research is to improve the way holographic transmissions take place so that new users are attracted to it because it is practical and easy to use. The main goal is to establish the parameters for the proper setup of a remote holographic telepresence system as a communication and support medium. With the aim of demonstrating, it is possible to improve communication and interaction over long distances and make it more human.
During the research, it is expected to speed up the setup process of a holographic projection system for future presentations by taking measurements of the distance from the projector depending on brightness, room lighting, room space, dress code, internet bandwidth, etc. It will be the next evolutionary step from video conferencing systems currently confined to a television screen, changing the way we communicate and travel the world. Is it possible to improve communication by improving the visual perception of the image by correcting the parameters of the holographic telepresence.
Methodology
Observation
Interview
Survey
The survey will be applied by email; a closed questionnaire will be sent to the participants of the experiment.
I challenge
Setting up the remote holographic telepresence system
An example would be a person sitting at a desk and visible from the surface of the desk upwards. The black background is necessary during shooting because it disappears during projection, leaving only the professor's body in the holography. When you illuminate the background of the screen with artificial lighting with dimmers, it makes the hologram illusion even more believable.
For the transmission area, it is recommended that there should be enough space for at least an average adult to stand in front of the black background for the camera to capture the subject for a full body transmission. Here the factors depend on how many spectators there are going to be, the size of the room or the auditorium, etc. For this purpose, it is highly recommended to set the reception of the transmission to test before a conference or lecture and to leave some marks of everything.
For the position of the webcam, the ideal position should be at the eye level of the spectators, but if this is not possible, another recommendation would be to place it in a place that gives it a wide field of vision of the target audience, so that the speaker may be able to see who he is addressing. In the figure it is shown that the user must be in front of the black background. The position of the webcam should be adjusted so that the only visible thing that will be transmitted is the black background and the user and nothing else.
Conclusions
Fast computation of the diffraction field from a three-dimensional object is essential to achieve video speed. The performance of the algorithm is evaluated in terms of the computation time of the diffraction field and the normalized mean square error in the reconstructed object. The diffraction field of the 3D object is calculated by superimposing the diffraction fields emitted by the points that form the 3D object.
To achieve a fast calculation, the precomputed LUT is used and the diffraction field of the 3D object can be obtained by scaling and overlapping the 2DKαl,2Das kernels. As a result, the total computation time of the diffraction field can be improved in terms of data acquisition. Variablaz0 defines the distance between the SLM and the closest light source point of the 3D object.
Performance of the proposed algorithm according to the number of cores used in LUT, NMSE and the allocated memory space. Meanwhile, the quality of reconstructed objects is improved by considering the pixelated structure of SLM. In the third application, the phase derivative distribution is estimated from the fringe model modulated by the maximum crest of the 2D-cwt coefficients.
The optical phase is calculated as the arctangent function of the ratio between the detail components (high frequency subbands) and the approximation components (low frequency subbands). In the first application, we describe a technique for reducing residual speckle noise through 2D stationary wavelet decomposition of the speckle correlation edge pattern [6]. The 2D continuous wavelet coefficients are obtained by calculating the correlation product between the input image (signal 2D) and the mother wavelet.
In general, the modulated fringe pattern intensity distribution, as represented by Eq. 2), the wavelet transform coefficients of the modulated fringe pattern, given in Eq.
