scholarly journals Hidden Surface Removal for Interaction between Hand and Virtual Objects in Augmented Reality

2019 ◽  
Vol 4 (4) ◽  
pp. 359-365
Author(s):  
Takahiro Ishizu ◽  
Makoto Sakamoto ◽  
Masamichi Hori ◽  
Takahiro Shinoda ◽  
Takaaki Toyota ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Virtual Objects ◽  
Hidden Surface Removal ◽  
Surface Removal

scholarly journals Hidden Surface Removal in Augmented Reality: Hand Region Extraction using PCA

2020 ◽  
Vol 8 (5) ◽  
pp. 4149-4155
Keyword(s):  
Augmented Reality ◽  
Principal Component ◽  
Real Space ◽  
Virtual Object ◽  
Depth Information ◽  
Depth Sensor ◽  
Virtual Objects ◽  
Color Range ◽  
Hidden Surface Removal ◽  
Surface Removal

Recently, augmented Reality (AR) is growing rapidly and much attention has been focused on interaction techniques between users and virtual objects, such as the user directly manipulating virtual objects with his/her bare hands. Therefore, the authors believe that more accurate overlay techniques will be required to interact more seamlessly. On the other hand, in AR technology, since the 3-dimensional (3D) model is superimposed on the image of the real space afterwards, it is always displayed on the front side than the hand. Thus, it becomes an unnatural scene in some cases (occlusion problem). In this study, this system considers the object-context relations between the user's hand and the virtual object by acquiring depth information of the user's finger using a depth sensor. In addition, the system defines the color range of the user's hand by performing principal component analysis (PCA) on the color information near the finger position obtained from the depth sensor and setting a threshold. Then, this system extracts an area of the hand by using the definition of the color range of the user's hand. Furthermore, the fingers are distinguished by using the Canny method. In this way, this system realizes hidden surface removal along the area of the user's hand. In the evaluation experiment, it is confirmed that the hidden surface removal in this study make it possible to distinguish between finger boundaries and to clarify and process finger contours.

scholarly journals Hidden Surface Removal for Interactions between User's Bare Hands and Virtual Objects in Augmented Reality

2020 ◽  
Vol 25 ◽  
pp. 728-731
Author(s):  
Takahiro Ishizu ◽  
Makoto Sakamoto ◽  
Kenji Sakoma ◽  
Takahiro Shinoda ◽  
Amane Takei ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Virtual Objects ◽  
Hidden Surface Removal ◽  
Surface Removal

A multi-processor system for hidden-surface-removal

1981 ◽  
Vol 15 (4) ◽  
pp. 405-436 ◽  
Author(s):  
P. Chang ◽  
Ramesh Jain
Keyword(s):  
Hidden Surface Removal ◽  
Surface Removal

Augmented Reality Berbasis Android Sebagai Media Pembelajaran Sistem Tata Surya

2021 ◽  
Vol 2 (1) ◽  
pp. 53-59
Author(s):  
Yulia Fatma ◽  
Armen Salim ◽  
Regiolina Hayami
Keyword(s):  
Augmented Reality ◽  
Solar System ◽  
Real Time ◽  
Real World ◽  
Virtual World ◽  
The Real ◽  
Virtual Objects ◽  
Augmented Reality Technology ◽  
The Revolution

Along with the development, the application can be used as a medium for learning. Augmented Reality is a technology that combines two-dimensional’s virtual objects and three-dimensional’s virtual objects into a real three-dimensional’s  then projecting the virtual objects in real time and simultaneously. The introduction of Solar System’s material, students are invited to get to know the planets which are directly encourage students to imagine circumtances in the Solar System. Explenational of planets form and how the planets make the revolution and rotation in books are considered less material’s explanation because its only display objects in 2D. In addition, students can not practice directly in preparing the layout of the planets in the Solar System. By applying Augmented Reality Technology, information’s learning delivery can be clarified, because in these applications are combined the real world and the virtual world. Not only display the material, the application also display images of planets in 3D animation’s objects with audio.

Real-Time Occlusion Between Real and Digital Objects in Augmented Reality

2018 ◽  
Author(s):  
Kevin Lesniak ◽  
Conrad S. Tucker
Keyword(s):  
Augmented Reality ◽  
Coordinate System ◽  
Real Time ◽  
Real World ◽  
Virtual Object ◽  
Virtual Objects ◽  
Common Coordinate System ◽  
Realistic Representation ◽  
Lead Users

The method presented in this work reduces the frequency of virtual objects incorrectly occluding real-world objects in Augmented Reality (AR) applications. Current AR rendering methods cannot properly represent occlusion between real and virtual objects because the objects are not represented in a common coordinate system. These occlusion errors can lead users to have an incorrect perception of the environment around them when using an AR application, namely not knowing a real-world object is present due to a virtual object incorrectly occluding it and incorrect perception of depth or distance by the user due to incorrect occlusions. The authors of this paper present a method that brings both real-world and virtual objects into a common coordinate system so that distant virtual objects do not obscure nearby real-world objects in an AR application. This method captures and processes RGB-D data in real-time, allowing the method to be used in a variety of environments and scenarios. A case study shows the effectiveness and usability of the proposed method to correctly occlude real-world and virtual objects and provide a more realistic representation of the combined real and virtual environments in an AR application. The results of the case study show that the proposed method can detect at least 20 real-world objects with potential to be incorrectly occluded while processing and fixing occlusion errors at least 5 times per second.

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