CN109389538A - A kind of Intelligent campus management system based on AR technology - Google Patents
A kind of Intelligent campus management system based on AR technology Download PDFInfo
- Publication number
- CN109389538A CN109389538A CN201811157066.6A CN201811157066A CN109389538A CN 109389538 A CN109389538 A CN 109389538A CN 201811157066 A CN201811157066 A CN 201811157066A CN 109389538 A CN109389538 A CN 109389538A
- Authority
- CN
- China
- Prior art keywords
- technology
- intelligent
- campus
- module
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005516 engineering process Methods 0.000 title claims abstract description 109
- 230000004927 fusion Effects 0.000 claims abstract description 18
- 238000010276 construction Methods 0.000 claims description 14
- 230000003993 interaction Effects 0.000 claims description 13
- 230000010354 integration Effects 0.000 claims description 9
- 238000009877 rendering Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000009738 saturating Methods 0.000 claims 1
- 230000009466 transformation Effects 0.000 claims 1
- 230000003190 augmentative effect Effects 0.000 abstract description 4
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/10—Services
- G06Q50/20—Education
- G06Q50/205—Education administration or guidance
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T19/00—Manipulating 3D models or images for computer graphics
- G06T19/006—Mixed reality
Landscapes
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Tourism & Hospitality (AREA)
- Strategic Management (AREA)
- Software Systems (AREA)
- Computer Graphics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Marketing (AREA)
- Primary Health Care (AREA)
- General Business, Economics & Management (AREA)
- Health & Medical Sciences (AREA)
- Human Resources & Organizations (AREA)
- General Health & Medical Sciences (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Economics (AREA)
- Geometry (AREA)
- Processing Or Creating Images (AREA)
Abstract
The present invention relates to school education military equipment management technical fields, in particular a kind of Intelligent campus management system based on AR technology, including client, information management server and display platform, the client includes registration and log-in module, intelligent environment module, wisdom Teaching Module and image capture module, it is built by multi-sensor information fusion technology applied to Intelligent campus, it is mainly manifested in two aspects of Pixel-level fusion and Feature-level fusion --- real-time video control technology is directly to carry out informix processing to each pixel in true campus original image, it is a kind of information fusion carried out in basic data level, multi-sensor information fusion technology is then mainly for main feature information (such as edge of true campus image, shape, texture etc.) carry out informix processing, reference is provided to generate virtual campus , both more information can be provided for augmented reality virtual campus, the understanding to various dimensions Intelligent campus environment is finally collectively formed.
Description
Technical field
The present invention relates to school education military equipment management technical field, specially a kind of Intelligent campus education based on AR technology
Equipment management system.
Background technique
Augmented reality (AR) refers to through multimedia technology, dimensional Modeling Technology, real-time video control technology, more biographies
The multiple technologies means such as sensor information fusion technology, real-time tracking and registration technology, scene integration technology, by the virtual letter of generation
Breath is fused among real scene, so that virtual enhancement information and real scene information mutually coexist, are complementary to one another, is mutually folded
Add.The application characteristic of AR technology provides a kind of new thinking for service Intelligent campus construction, i.e., using mass efficient data into
Row visual dynamic model building, and by the relevant information of simulation change virtual campus, optimize real Campus Construction strategy, promotes school
Garden wisdomization is horizontal.From the viewpoint of AR technology, be exactly require in the process of construction of Intelligent campus, by wisdom apply and
Service, can be realized the seamless fusion of virtual information and true environment, with promoted user there are senses, enhance the intuition of user
Property, so that the situational, property immersed is strengthened.
Therefore a kind of Intelligent campus management system based on AR technology is needed.
Summary of the invention
The purpose of the present invention is to provide a kind of Intelligent campus management systems based on AR technology, on solving
State the problem of proposing in background technique.
To achieve the above object, the invention provides the following technical scheme:
A kind of Intelligent campus management system based on AR technology, including client, information management server and
Display platform, the client include registration and log-in module, intelligent environment module, wisdom Teaching Module and Image Acquisition mould
Block.
The wisdom Teaching Module includes dimensional Modeling Technology and display technology, and the dimensional Modeling Technology includes base
In the Virtual Intelligent ampus modeling of image and based on geometrical model virtual Intelligent campus modeling, the display technology include view
The display of frequency perspective, optical perspective is shown, projection is shown and regular display is shown.
The intelligent environment module includes scene integration technology module and human-computer interaction technology module, real-time video control
Technology, multi-sensor information fusion technology.
The technical step of the intelligent environment module construction Intelligent campus content includes:
S1: by real-time video control technology to Intelligent campus true environment using multimedia technologies hands such as audio, videos
Duan Jinhang real time monitoring understands true environment by dimensional Modeling Technology, various dimensions environmental interaction understands and multimedia technology
Carrying out rendering output synthesizes wisdom AR virtual campus model；
S2: the true ring of Intelligent campus is reached by real-time tracking and registration technology, scene integration technology, human-computer interaction technology
The positive and negative feedback of border and wisdom AR virtual campus is finally reached the construction that AR integrates Intelligent campus.
Wisdom teaching key step of the wisdom Teaching Module building based on AR technology includes dimensional Modeling Technology and shows
Show the application of two aspects of technology, construction step includes:
S1: dimensional Modeling Technology constructs its three-dimensional model according to the three-dimensional spatial information of object, utilizes correlation modeling software
Or programming language generates the graphical display of the model, and it is carried out it is various operate and handle, the Computerized three-dimensional based on image
Modeling can directly adopt image to realize the model creation of complex environment, and panoramic technique and the interpolation and view of image is utilized to become
The technology of changing can realize the real-time display of complex scene on a common computer；Computerized three-dimensional modeling based on geometrical model is logical
It crosses and the geological information of object is handled, be related to the data structure and building, the algorithm for manipulating data structure of geological information
Modeling；
S2: display technology realizes the technology of actual situation image of showing after virtual information is merged with real scene, in AR system
Display can be divided into Helmet Mounted Display (using the technologies such as video perspective is shown, optical perspective is shown) and non-Helmet Mounted Display (is adopted
It is shown with projection, the technologies such as regular display is shown).
Described image acquisition module utilizes high-end intelligent camera (i.e. so-called AR video camera).
Compared with prior art, the beneficial effects of the present invention are:
1, pass through real-time video control technology --- it utilizes high-end intelligent camera (i.e. so-called AR video camera), from difference
Angle, orientation shoot video material；Meanwhile in conjunction with the position of video camera and towards (i.e. the posture of video camera), in addition orientation
The markup informations such as angle, distance, position, Lai Gaishan user experience, enhancing interaction capabilities, real-time video control technology are applied to wisdom
Campus Construction, mainly will be in conjunction with the enhancement informations such as the real-time video of real Intelligent campus and video camera posture, digitized label
Get up, while so that user is seen real-time video picture, further types of full spectrum information can be obtained.
2, pass through multi-sensor information fusion technology --- it is mainly shown as image fusion technology, it can integrate multi-source figure
As information, by extracting and comprehensive analysis, obtain to real scene more fully, accurately iamge description, make fused figure
As more meeting human vision property, in favor of further analyzing, understanding.
The present invention is not directed to part in the device and is the same as those in the prior art or can be realized by using the prior art, more
Sensor data fusion technology is built applied to Intelligent campus, is mainly manifested in two sides of Pixel-level fusion and Feature-level fusion
Face --- real-time video control technology is directly to carry out informix processing to each pixel in true campus original image,
It is a kind of information fusion carried out in basic data level；Multi-sensor information fusion technology is then mainly for true campus image
Main feature information (such as edge, shape, texture) carry out informix processing, for generate virtual campus reference is provided；Two
Person can provide more information for augmented reality virtual campus, and the reason to various dimensions Intelligent campus environment is finally collectively formed
Solution.
Detailed description of the invention
Fig. 1 is overall system view of the present invention；
Fig. 2 is that AR of the present invention integrates Intelligent campus construction content techniqueflow chart；
Fig. 3 is AR technology wisdom of the present invention teaching structure figures.
In figure: 1- client, 2- information management server, 3- display platform, 4- registration and log-in module, 5- intelligent environment
Module, 6- wisdom Teaching Module, 7- image capture module.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-3 is please referred to, the present invention provides a kind of technical solution:
A kind of Intelligent campus management system based on AR technology, including client 1, information management server 2
With display platform 3, client 1 includes registration and log-in module 4, intelligent environment module 5, wisdom Teaching Module 6 and Image Acquisition
Module 7.
Wisdom Teaching Module 6 includes dimensional Modeling Technology and display technology, and dimensional Modeling Technology includes based on image
Virtual Intelligent ampus modeling and virtual Intelligent campus modeling based on geometrical model, display technology includes that video perspective is aobvious
Show, optical perspective is shown, projection is shown and regular display is shown.
Intelligent environment module 5 includes scene integration technology module and human-computer interaction technology module, and real-time video controls skill
Art, multi-sensor information fusion technology.
Intelligent environment module 5 build Intelligent campus content technical step include:
S1: by real-time video control technology to Intelligent campus true environment using multimedia technologies hands such as audio, videos
Duan Jinhang real time monitoring understands true environment by dimensional Modeling Technology, various dimensions environmental interaction understands and multimedia technology
Carrying out rendering output synthesizes wisdom AR virtual campus model；
S2: the true ring of Intelligent campus is reached by real-time tracking and registration technology, scene integration technology, human-computer interaction technology
The positive and negative feedback of border and wisdom AR virtual campus is finally reached the construction that AR integrates Intelligent campus.
Wisdom teaching key step of the building of wisdom Teaching Module 6 based on AR technology includes dimensional Modeling Technology and display skill
The application of two aspects of art, construction step include:
S1: dimensional Modeling Technology constructs its three-dimensional model according to the three-dimensional spatial information of object, utilizes correlation modeling software
Or programming language generates the graphical display of the model, and it is carried out it is various operate and handle, the Computerized three-dimensional based on image
Modeling can directly adopt image to realize the model creation of complex environment, and panoramic technique and the interpolation and view of image is utilized to become
The technology of changing can realize the real-time display of complex scene on a common computer；Computerized three-dimensional modeling based on geometrical model is logical
It crosses and the geological information of object is handled, be related to the data structure and building, the algorithm for manipulating data structure of geological information
Modeling；
S2: display technology realizes the technology of actual situation image of showing after virtual information is merged with real scene, in AR system
Display can be divided into Helmet Mounted Display (using the technologies such as video perspective is shown, optical perspective is shown) and non-Helmet Mounted Display (is adopted
It is shown with projection, the technologies such as regular display is shown).
Image capture module 7 utilizes high-end intelligent camera (i.e. so-called AR video camera).
Pass through real-time video control technology --- it utilizes high-end intelligent camera (i.e. so-called AR video camera), from different
Angle, orientation shoot video material；Meanwhile in conjunction with the position of video camera and towards (i.e. the posture of video camera), in addition azimuth,
The markup informations such as distance, position, Lai Gaishan user experience, enhancing interaction capabilities, real-time video control technology are applied to wisdom school
Garden construction, mainly by conjunction with the enhancement informations such as the real-time video of real Intelligent campus and video camera posture, digitized label
Come, while so that user is seen real-time video picture, further types of full spectrum information can be obtained.Pass through multi-sensor information
Integration technology --- be mainly shown as image fusion technology, it can integrate multi-source image information, through extraction and comprehensive analysis,
Obtain to real scene more fully, accurately iamge description, so that fused image is more met human vision property, in favor of
Further analysis, understanding etc..
Embodiment: wisdom experience is mainly manifested in the sense of reality to augmented reality virtual campus, and and intelligent environment
Interaction.In order to obtain real-time actual experience, not only needs to accurately track, positions actual situation scene, (such as to related auxiliary parameter
Shade, illumination etc.) really rendered, also need to consider naturally to interact with integrated environment, and to dependent instruction make it is real-time instead
Feedback --- this is just needed with AR Rendering, scene integration technology and human-computer interaction technology, with from truly promoting intelligence
The depth experience sense in intelligent campus.Actual experience based on AR virtual technology Intelligent campus it may first have to virtual campus environment mould
Type is really rendered: on the one hand, Real-time Rendering Technology can be used, to including position, normal direction, color, texture coordinate, vertex
Weight etc. including graph data calculated and exported in real time；On the other hand, it can introduce and be virtually implanted rendering engine, it will
These are calculated in real time and the data of output give in conjunction with the 3D dummy object of virtual light source, transparent effect and real-time rendering
Real-time rendering and be loaded into vision signal it.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of Intelligent campus management system based on AR technology, including client (1), information management server
(2) and display platform (3), it is characterised in that: the client (1) includes registration and log-in module (4), intelligent environment module
(5), wisdom Teaching Module (6) and image capture module (7).
2. a kind of Intelligent campus management system based on AR technology according to claim 1, it is characterised in that:
The wisdom Teaching Module (6) includes dimensional Modeling Technology and display technology, and the dimensional Modeling Technology includes based on figure
The Virtual Intelligent ampus modeling of picture and based on geometrical model virtual Intelligent campus modeling, the display technology includes that video is saturating
Depending on display, optical perspective is shown, projection is shown and regular display is shown.
3. a kind of Intelligent campus management system based on AR technology according to claim 1, it is characterised in that:
The intelligent environment module (5) include scene integration technology module and human-computer interaction technology module, real-time video control technology,
Multi-sensor information fusion technology.
4. a kind of Intelligent campus management system based on AR technology according to claim 1, it is characterised in that:
The technical step of the intelligent environment module (5) construction Intelligent campus content includes:
S1: by real-time video control technology to Intelligent campus true environment using the Multimedia means such as audio, video into
Row real time monitoring understands true environment by dimensional Modeling Technology, various dimensions environmental interaction understands and multimedia technology carries out
Rendering output synthesizes wisdom AR virtual campus model；
S2: by real-time tracking and registration technology, scene integration technology, human-computer interaction technology reach Intelligent campus true environment and
The positive and negative feedback of wisdom AR virtual campus is finally reached the construction that AR integrates Intelligent campus.
5. a kind of Intelligent campus management system based on AR technology according to claim 1, it is characterised in that:
Wisdom teaching key step of wisdom Teaching Module (6) building based on AR technology includes dimensional Modeling Technology and display technology
The application of two aspects, construction step include:
S1: dimensional Modeling Technology constructs its three-dimensional model according to the three-dimensional spatial information of object, utilizes correlation modeling software or volume
The graphical display of the journey language generation model, and it is carried out it is various operate and handle, the modeling of Computerized three-dimensional based on image
Image can be directlyed adopt to realize the model creation of complex environment, and utilize the interpolation and view transformation skill of panoramic technique and image
Art can realize the real-time display of complex scene on a common computer；Computerized three-dimensional modeling based on geometrical model is by right
The geological information of object is handled, and the data structure and building, the algorithm modeling for manipulating data structure of geological information are related to；
S2: display technology realization virtual information shows the technology of actual situation image, the display in AR system after merging with real scene
Device can be divided into Helmet Mounted Display (using the technologies such as video perspective is shown, optical perspective is shown) and non-Helmet Mounted Display (using throwing
The technologies such as shadow formula is shown, regular display is shown).
6. a kind of Intelligent campus management system based on AR technology according to claim 1, it is characterised in that:
Described image acquisition module (7) utilizes high-end intelligent camera (i.e. so-called AR video camera).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811157066.6A CN109389538A (en) | 2018-09-30 | 2018-09-30 | A kind of Intelligent campus management system based on AR technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811157066.6A CN109389538A (en) | 2018-09-30 | 2018-09-30 | A kind of Intelligent campus management system based on AR technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109389538A true CN109389538A (en) | 2019-02-26 |
Family
ID=65419081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811157066.6A Pending CN109389538A (en) | 2018-09-30 | 2018-09-30 | A kind of Intelligent campus management system based on AR technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109389538A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115098708A (en) * | 2022-08-26 | 2022-09-23 | 深圳市纬亚森科技有限公司 | Intelligent campus remote supervision system and method based on multimedia technology |
| CN115689833A (en) * | 2022-12-29 | 2023-02-03 | 成都华栖云科技有限公司 | Intelligent teaching spatial mode construction method based on multi-dimensional perception and pervasive computing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080268418A1 (en) * | 2007-04-25 | 2008-10-30 | Tashner John H | Virtual education system and method of instruction |
| CN103366610A (en) * | 2013-07-03 | 2013-10-23 | 熊剑明 | Augmented-reality-based three-dimensional interactive learning system and method |
| CN106157359A (en) * | 2015-04-23 | 2016-11-23 | 中国科学院宁波材料技术与工程研究所 | A kind of method for designing of virtual scene experiencing system |
| CN107742263A (en) * | 2017-09-01 | 2018-02-27 | 合肥迅大信息技术有限公司 | Intelligent campus management system based on AR technologies |
-
2018
- 2018-09-30 CN CN201811157066.6A patent/CN109389538A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080268418A1 (en) * | 2007-04-25 | 2008-10-30 | Tashner John H | Virtual education system and method of instruction |
| CN103366610A (en) * | 2013-07-03 | 2013-10-23 | 熊剑明 | Augmented-reality-based three-dimensional interactive learning system and method |
| CN106157359A (en) * | 2015-04-23 | 2016-11-23 | 中国科学院宁波材料技术与工程研究所 | A kind of method for designing of virtual scene experiencing system |
| CN107742263A (en) * | 2017-09-01 | 2018-02-27 | 合肥迅大信息技术有限公司 | Intelligent campus management system based on AR technologies |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115098708A (en) * | 2022-08-26 | 2022-09-23 | 深圳市纬亚森科技有限公司 | Intelligent campus remote supervision system and method based on multimedia technology |
| CN115098708B (en) * | 2022-08-26 | 2022-11-01 | 深圳市纬亚森科技有限公司 | Intelligent campus remote supervision system and method based on multimedia technology |
| CN115689833A (en) * | 2022-12-29 | 2023-02-03 | 成都华栖云科技有限公司 | Intelligent teaching spatial mode construction method based on multi-dimensional perception and pervasive computing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chen et al. | An overview of augmented reality technology | |
| CN108525298B (en) | Image processing method, image processing device, storage medium and electronic equipment | |
| US20140104394A1 (en) | System and method for combining data from multiple depth cameras | |
| CN102945564A (en) | True 3D modeling system and method based on video perspective type augmented reality | |
| CN107154197A (en) | Immersion flight simulator | |
| CN104103081A (en) | Virtual multi-camera target tracking video material generation method | |
| CN109688343A (en) | The implementation method and device of augmented reality studio | |
| Yu et al. | Intelligent visual-IoT-enabled real-time 3D visualization for autonomous crowd management | |
| Naemura et al. | Virtual shadows in mixed reality environment using flashlight-like devices | |
| CN110070622A (en) | A kind of library application system and application method based on AR technology | |
| CN109389538A (en) | A kind of Intelligent campus management system based on AR technology | |
| Inoue et al. | Tracking Robustness and Green View Index Estimation of Augmented and Diminished Reality for Environmental Design | |
| CN111698391A (en) | Method for controlling real-time change of light parameters through simulated environment light parameters | |
| Zhuang | Film and television industry cloud exhibition design based on 3D imaging and virtual reality | |
| CN113689756A (en) | Cabin reconstruction system based on augmented reality and implementation method | |
| WO2022023142A1 (en) | Virtual window | |
| Ishigaki et al. | Real-time 3D reconstruction for mixed reality telepresence using multiple depth sensors | |
| KR20200008227A (en) | System and method for controlling gesture based light dimming effect using natural user interface | |
| CN108346183A (en) | A kind of method and system for AR origin reference locations | |
| CN112862976B (en) | Data processing method and device and electronic equipment | |
| CN113989462A (en) | Railway signal indoor equipment maintenance system based on augmented reality | |
| Han et al. | The application of augmented reality technology on museum exhibition—a museum display project in Mawangdui Han dynasty tombs | |
| Huang et al. | Design and application of intelligent patrol system based on virtual reality | |
| Liu | Light image enhancement based on embedded image system application in animated character images | |
| Shasha et al. | Object Recognition of Environmental Information in the Internet of Things Based on Augmented Reality |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190226 |