scholarly journals Automatic Registration of Multi-Projector Based on Coded Structured Light

Symmetry ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1397
Author(s):  
Shuaihe Zhao ◽  
Mengyi Zhao ◽  
Shuling Dai
Keyword(s):  
Virtual Reality ◽  
Structured Light ◽  
New Method ◽  
Geometric Distortion ◽  
Feature Points ◽  
Automatic Registration ◽  
Geometric Correction ◽  
Flight Simulators ◽  
Display Systems

Multi-projector display systems are widely used in virtual reality, flight simulators, and other entertainment systems. Geometric distortion and color inconsistency are two key problems to be solved. In this paper a geometric correction principle is theoretically demonstrated and a consistency principle of geometric correction is first proposed. A new method of automatic registration of a multi-projector on a curved screen is put forward. Two pairs of binocular-cameras are used to reconstruct the curved screen. To capture feature points of the curved screen precisely, a group of red-blue coded structured light images is designed to be projected onto the screen. Geometric homography between each projector and the curved screen is calculated to gain a pre-warp template. Work which can gain a seamless display is illustrated by a six-projector system on the curved screen.

scholarly journals AUTOMATED MOSAICKING OF GEOSTATIONARY OCEAN COLOR IMAGER BY COMBINATION OF SPATIAL AND FREQUENCY MATCHING

2018 ◽  
Vol XLII-2 ◽  
pp. 495-499
Author(s):  
H. G. Kim ◽  
J. H. Son ◽  
T. Kim
Keyword(s):  
Frequency Domain ◽  
Spatial Domain ◽  
Geometric Distortion ◽  
Future Research ◽  
Geometric Correction ◽  
Frequency Matching ◽  
Image Mosaicking ◽  
Important Processing ◽  
Sensor Modelling

In general, image mosaicking is a useful and important processing for handling images with narrow field of view. It is being used widely for images from commercial cameras as well as from aerial and satellite cameras. For mosaicking images with geometric distortion, geometric correction of each image should be performed before combining images. However, automated mosaicking images with geometric distortion is not a trivial task. The goal of this paper is the development of automated mosaicking techniques applicable to handle GOCI images. In this paper, we try to extract tie-points by using spatial domain and frequency domain matching and perform the mosaicking of GOCI. The method includes five steps. First, we classify GOCI image slots according to the existence of shorelines by spatial domain matching. Second, we perform precise geometric correction on the slots with shorelines. Third, we perform initial sensor modelling for the slots without shorelines and apply geometric correction based on the initial model. Fourth, the relative relationship between the slots without shorelines and the slots with shorelines is estimated through frequency domain matching. Lastly, mosaicking of geometrically corrected all 16 image slots is performed. The proposed method was verified by applying to real GOCI images. The proposed method was able to perform automated mosaicking even for images without shorelines, and its accuracy and processing time were satisfactory. For future research, we will improve frequency matching to generate multiple tie-points and to analyse the applicability of precise sensor modelling directly from frequency matching. It is expected that the proposed method can be applied to the follow-up sensor of the GOCI, GOCI-II, and other ocean satellite images.

Geometric distortion correction for structured-light image of deep-hole inner-surface

2018 ◽  
Vol 26 (10) ◽  
pp. 2555-2564
Author(s):  
丁 超 DING Chao ◽  
唐力伟 TANG Li-wei ◽  
曹立军 CAO Li-jun ◽  
邵新杰 SHAO Xin-jie ◽  
邓士杰 DENG Shi-jie
Keyword(s):  
Structured Light ◽  
Distortion Correction ◽  
Geometric Distortion ◽  
Deep Hole ◽  
Light Image ◽  
Inner Surface

scholarly journals Realistic Virtual Cables in a 2D Environment Representing a 3D Virtual Reality

2018 ◽  
Vol 14 (08) ◽  
pp. 169
Author(s):  
Boris Ivanov Evstatiev
Keyword(s):  
Virtual Reality ◽  
Electrical Engineering ◽  
Control Point ◽  
Common Point ◽  
Suggested Method ◽  
New Method ◽  
Engineering Equipment ◽  
Realistic Representation ◽  
Realistic Visualization ◽  
2D Space

A new method for the realistic visualization of virtual cables in a 2D environment, which is representing a 3D virtual reality, is presented in this paper. They are described with two consecutive cubic Bezier curves, whose common point is movable. Experiment was carried out and the optimal proportions for the parameters of the curves were obtained in order to achieve a realistic representation of cables. The suggested method has been developed for and implemented in the Engine for Virtual Electrical Engineering Equipment. The obtained results show that it is easy to manipulate the route of the virtual cables in 2D space and that they look realistic for any position of the control point.

A scalable architecture for geometric correction of multi-projector display systems

Displays ◽  
2015 ◽  
Vol 40 ◽  
pp. 104-112 ◽  
Author(s):  
Kamran Babar ◽  
Rehan Hafiz ◽  
Khawar Khurshid ◽  
Awais M. Kamboh ◽  
Ali Hassan ◽  
...  
Keyword(s):  
Geometric Correction ◽  
Scalable Architecture ◽  
Display Systems

scholarly journals The Feeling is Real: Emotion Elicitation in Virtual Reality

2019 ◽  
Vol 63 (1) ◽  
pp. 252-256
Author(s):  
Sahinya Susindar ◽  
Mahnoosh Sadeghi ◽  
Lea Huntington ◽  
Andrew Singer ◽  
Thomas K. Ferris
Keyword(s):  
Decision Making ◽  
Virtual Reality ◽  
Cognitive Processes ◽  
Emotional Responses ◽  
Decision Task ◽  
Affective States ◽  
Desktop Computer ◽  
Emotion Elicitation ◽  
Human Decision ◽  
Display Systems

Classical methods for eliciting emotional responses, including the use of emotionally-charged pictures and films, have been used to study the influence of affective states on human decision-making and other cognitive processes. Advanced multisensory display systems, such as Virtual Reality (VR) headsets, offer a degree of immersion that may support more reliable elicitation of emotional experiences than less-immersive displays, and can provide a powerful yet relatively safe platform for inducing negative emotions such as fear and anger. However, it is not well understood how the presentation medium influences the degree to which emotions are elicited. In this study, emotionally-charged stimuli were introduced via two display configurations – on a desktop computer and on a VR system –and were evaluated based on performance in a decision task. Results show that the use of VR can be a more effective method for emotion elicitation when study decision-making under the influence of emotions.

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