scholarly journals Multi-View 3D Integral Imaging Systems Using Projectors and Mobile Devices

Photonics ◽  
2021 ◽  
Vol 8 (8) ◽  
pp. 331
Author(s):  
Nikolai Petrov ◽  
Maksim Khromov ◽  
Yuri Sokolov
Keyword(s):  
Mobile Devices ◽  
Mobile Phones ◽  
Three Dimensional ◽  
Imaging Systems ◽  
Viewing Angle ◽  
3D Images ◽  
Integral Imaging ◽  
Large Size ◽  
3D Displays ◽  
2D Images

Glassless 3D displays using projectors and mobile phones based on integral imaging technology have been developed. Three-dimensional image files are created from the 2D images captured by a conventional camera. Large size 3D images using four HD and Ultra HD 4K projectors are created with a viewing angle of 35 degrees and a large depth. Three-dimensional images are demonstrated using optimized lenticular lenses and mobile smartphones, such as LG and Samsung with resolution 2560 × 1440, and 4K Sony with resolution 3840 × 2160.

scholarly journals Do 3D Face Images Capture Cues of Strength, Weight, and Height Better than 2D Face Images do?

2021 ◽  
Vol 7 (3) ◽  
pp. 209-219
Author(s):  
Iris J Holzleitner ◽  
Alex L Jones ◽  
Kieran J O’Shea ◽  
Rachel Cassar ◽  
Vanessa Fasolt ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Physical Characteristics ◽  
Two Dimensional ◽  
3D Images ◽  
3D Face ◽  
Face Images ◽  
Similar Accuracy ◽  
2D And 3D ◽  
2D Images ◽  
Better Than

Abstract Objectives A large literature exists investigating the extent to which physical characteristics (e.g., strength, weight, and height) can be accurately assessed from face images. While most of these studies have employed two-dimensional (2D) face images as stimuli, some recent studies have used three-dimensional (3D) face images because they may contain cues not visible in 2D face images. As equipment required for 3D face images is considerably more expensive than that required for 2D face images, we here investigated how perceptual ratings of physical characteristics from 2D and 3D face images compare. Methods We tested whether 3D face images capture cues of strength, weight, and height better than 2D face images do by directly comparing the accuracy of strength, weight, and height ratings of 182 2D and 3D face images taken simultaneously. Strength, height and weight were rated by 66, 59 and 52 raters respectively, who viewed both 2D and 3D images. Results In line with previous studies, we found that weight and height can be judged somewhat accurately from faces; contrary to previous research, we found that people were relatively inaccurate at assessing strength. We found no evidence that physical characteristics could be judged more accurately from 3D than 2D images. Conclusion Our results suggest physical characteristics are perceived with similar accuracy from 2D and 3D face images. They also suggest that the substantial costs associated with collecting 3D face scans may not be justified for research on the accuracy of facial judgments of physical characteristics.

Performance analysis of three-dimensional integral imaging systems based on human vision

Optik ◽  
2013 ◽  
Vol 124 (2) ◽  
pp. 134-138 ◽  
Author(s):  
Fang Wang ◽  
Xing Zhao ◽  
Yong Yang ◽  
Zhiliang Fang ◽  
Xiaocong Yuan
Keyword(s):  
Performance Analysis ◽  
Three Dimensional ◽  
Human Vision ◽  
Imaging Systems ◽  
Integral Imaging ◽  
Dimensional Integral

From Telecytology to Mobile Cytopathology

2020 ◽  
pp. 1921-1942
Author(s):  
Abraham Pouliakis ◽  
Stavros Archondakis ◽  
Niki Margari ◽  
Petros Karakitsos
Keyword(s):  
Quality Control ◽  
Mobile Devices ◽  
Mobile Phones ◽  
Mobile Device ◽  
Imaging Systems ◽  
Laboratory Personnel ◽  
Medical Tests ◽  
Virtual Slides ◽  
Desktop Computers ◽  
Exchange Data

Cytopathology is a popular discipline since George Papanicolaou proposed the famous test pap about 60 years ago. Today modern cytopathology laboratories still use the microscope as the primary diagnostic device and additionally they host modalities performing medical tests and exchange data via networks and have imaging systems producing pictures and virtual slides; the volume of produced data nowadays is enormous. Simultaneously mobile phones and tablets have evolved; their capabilities compete desktop computers and have the advantage of being always connected and at the side of users. Despite there are rather limited applications relevant to cytopathology for the mobile device, there is potential for uses in numerous activities of the cytopathology laboratory, including and not limited to: training, reporting, diagnosis and consultation, laboratory management, whole slide imaging, interactions between patient-doctor, doctor-doctor and within the laboratory personnel, quality control and assurance. Mobile devices can offer important benefits to the modern cytopathology laboratory.

scholarly journals A Reflective Augmented Reality Integral Imaging 3D Display by Using a Mirror-Based Pinhole Array

2019 ◽  
Vol 9 (15) ◽  
pp. 3124
Author(s):  
Qiang Li ◽  
Huan Deng ◽  
Senlin Pang ◽  
Wenhao Jiang ◽  
Qionghua Wang
Keyword(s):  
Augmented Reality ◽  
Three Dimensional ◽  
3D Display ◽  
Projection System ◽  
Imaging Device ◽  
Integral Imaging ◽  
The Real ◽  
Large Size ◽  
Low Weight ◽  
Real Objects

In this paper, we propose a reflective augmented reality (AR) display system based on integral imaging (II) using a mirror-based pinhole array (MBPA). The MBPA, obtained by punching pinholes on a mirror, functions as a three-dimensional (3D) imaging device, as well as an image combiner. The pinhole array of MBPA can realize a pinhole array-based II display, while the mirror of MBPA can image the real objects, so as to combine the images of the real objects with the reconstructed 3D images. The structure of the proposed reflective AR display is very simple, and only a projection system or a two-dimensional display screen is needed to combine with the MBPA. In our experiment, a 25cm × 14cm sized AR display was built up, a combination of a 3D virtual image and a real 3D object was presented by the proposed AR 3D display. The proposed device could realize an AR display of large size due to its compact form factor and low weight.

3D Integral Imaging Encryption Using a Depth-Converted Elemental Image Array

2013 ◽  
Vol 479-480 ◽  
pp. 958-962
Author(s):  
Xiao Wei Li ◽  
Seok Ki Lee ◽  
Sung Jin Cho ◽  
Seok Tae Kim
Keyword(s):  
Image Encryption ◽  
Three Dimensional ◽  
3D Image ◽  
Long Distance ◽  
3D Images ◽  
Integral Imaging ◽  
Computational Integral Imaging ◽  
Smart Pixel ◽  
Elemental Image ◽  
Encryption Method

We propose a three-dimensional (3D) image encryption method based on the modified computational integral imaging (CII) technique with the smart pixel mapping (SPM) algorithm, which is introduced for reconstructing orthoscopic 3D images with improved image quality. The depth-converted two-dimensional (2D) elemental image array (EIA) is firstly obtained by SPM-based CII system, and then the 2D EIA is encrypted by Fibonacci transform for 3D image encryption. Compared with conventional encryption methods based on integral imaging (II), the proposed method enables us to reconstruct orthoscopic 3D images at long distance. In addition, the qualities of the reconstructed plane images are enhanced by applying the SPM and pixel average algorithm (PAA) in CII. To show the usefulness of the proposed method, we carry out the preliminary experiments and present the experimental results.

scholarly journals Studying the Recent Improvements in Holograms for Three-Dimensional Display

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Hamed Abbasi ◽  
Talie Zarei ◽  
Neda Jalali Farahani ◽  
Adeleh Granmayeh Rad
Keyword(s):  
Three Dimensional ◽  
3D Images ◽  
3D Displays ◽  
Three Dimensional Display ◽  
Three Dimensional Images

Displayers tend to become three-dimensional. The most advantage of holographic 3D displays is the possibility to observe 3D images without using glasses. The quality of created images by this method has surprised everyone. In this paper, the experimental steps of making a transmission hologram have been mentioned. In what follows, current advances of this science-art will be discussed. The aim of this paper is to study the recent improvements in creating three-dimensional images and videos by means of holographic techniques. In the last section we discuss the potentials of holography to be applied in future.

scholarly journals To choose the use of 2d or 3d images in rehabilitation: review

2020 ◽  
Vol 17 (3) ◽  
pp. 116-119
Author(s):  
O. V. Kubryak ◽  
Elena Aleksandrovna Kriklenko
Keyword(s):  
Virtual Reality ◽  
Visual Perception ◽  
Visual Feedback ◽  
Three Dimensional ◽  
Motor Rehabilitation ◽  
Feedback Channel ◽  
Virtual Reality Technology ◽  
3D Images ◽  
3D Displays ◽  
Selection For

Different properties of displays, features of visual perception of three-dimensional images and other conditions, probably affect the effectiveness of motor rehabilitation when using a visual feedback channel and virtual reality technology. A brief review presents the latest publications on a choice of 2D or 3D displays. It is concluded that the presence of many features not only creates difficulties in comparing the effects of using various equipment, but also provides the potential for targeted display selection for a particular rehabilitation task.

From Telecytology to Mobile Cytopathology

2016 ◽  
pp. 240-261 ◽  
Author(s):  
Abraham Pouliakis ◽  
Stavros Archondakis ◽  
Niki Margari ◽  
Petros Karakitsos
Keyword(s):  
Quality Control ◽  
Mobile Devices ◽  
Mobile Phones ◽  
Mobile Device ◽  
Imaging Systems ◽  
Laboratory Personnel ◽  
Medical Tests ◽  
Virtual Slides ◽  
Desktop Computers ◽  
Exchange Data

Cytopathology is a popular discipline since George Papanicolaou proposed the famous test pap about 60 years ago. Today modern cytopathology laboratories still use the microscope as the primary diagnostic device and additionally they host modalities performing medical tests and exchange data via networks and have imaging systems producing pictures and virtual slides; the volume of produced data nowadays is enormous. Simultaneously mobile phones and tablets have evolved; their capabilities compete desktop computers and have the advantage of being always connected and at the side of users. Despite there are rather limited applications relevant to cytopathology for the mobile device, there is potential for uses in numerous activities of the cytopathology laboratory, including and not limited to: training, reporting, diagnosis and consultation, laboratory management, whole slide imaging, interactions between patient-doctor, doctor-doctor and within the laboratory personnel, quality control and assurance. Mobile devices can offer important benefits to the modern cytopathology laboratory.

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