CrowdMap is a system that uses crowdsourced sensor-rich videos to accurately reconstruct indoor floor plans. It improves upon previous inertial sensor-only methods by leveraging the visual information in videos. The system architecture includes modules for data collection, indoor path modeling, room layout modeling, and floor plan modeling. It is implemented on mobile and cloud platforms and evaluations show it can generate more accurate floor plans than structure from motion techniques. Future work will focus on extracting more context from room panoramas and addressing user incentive and privacy issues.
GIS is a system of record and as such incredably valuable basis for design. In the Geodesign process, (3D) GIS technology is incredably powerful for visualizing and analyzing urban designs. Procedural modellng in CityEngine allows city planners and designers generate flexible designs that allow for manipulation of all design parameters. 3D GIS technology connects the real world as it is stored in a realistic model with the virtual worlds of the future designed with procedural modelling.
This poster presents an overview of 3D GIS Capabilities. It can be used for discussions about 3D GIS workflows (from 3D data acquisition to 3D object creation to 3D analysis, modeling and visualization), and the possible applications of 3D GIS in urban and landscape environments
GIS is a system of record and as such incredably valuable basis for design. In the Geodesign process, (3D) GIS technology is incredably powerful for visualizing and analyzing urban designs. Procedural modellng in CityEngine allows city planners and designers generate flexible designs that allow for manipulation of all design parameters. 3D GIS technology connects the real world as it is stored in a realistic model with the virtual worlds of the future designed with procedural modelling.
This poster presents an overview of 3D GIS Capabilities. It can be used for discussions about 3D GIS workflows (from 3D data acquisition to 3D object creation to 3D analysis, modeling and visualization), and the possible applications of 3D GIS in urban and landscape environments
Satellite Image Processing technique to enhance raw images received from cameras or sensors placed on satellites, space probes and aircrafts or pictures taken in normal day to day life in various applications.
Learn and get aware about the role of Photogrammetry in GIS. How it provides a general framework for describing what Photogrammetry is, how it can be useful in GIS by making use of photographs to study the areas and give the quantitative measures of the photographed area.
A Vision-Based Mobile Platform for Seamless Indoor/Outdoor PositioningGuillaume Gales
The emergence of smartphones equipped with Internet access, high resolution cameras, and posi- tioning sensors opens up great opportunities for visualising geospatial information within augmented reality applications. While smartphones are able to provide geolocalisation, the inherent uncertainty in the estimated position, especially indoors, does not allow for completely accurate and robust alignment of the data with the camera images.
In this paper we present a system that exploits computer vision techniques in conjunction with GPS and inertial sensors to create a seamless indoor/outdoor positioning vision-based platform. The vision-based approach estimates the pose of the camera relative to the fac ̧ade of a building and recognises the fac ̧ade from a georeferenced image database. This permits the insertion of 3D widgets into the user’s view with a known orientation relative to the fac ̧ade. For example, in Figure 1 (a) we show how this feature can be used to overlay directional information on the input image. Furthermore we provide an easy and intuitive interface for non-expert users to add their own georeferenced content to the system, encouraging volunteering GI. Indeed, to achieve this users only need to drag and drop predefined 3D widgets into a reference view of the fac ̧ade, see Figure 1 (b). The infrastructure is flexible in that we can add different layers of content on top of the fac ̧ades and hence, this opens many possibilities for different applications. Furthermore the system provides a representation suitable for both manual and automatic content authoring.
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Photogrammetry: Latest Technology to Create Maps Using Drones?NI BT
To know more about Photogrammetry: Latest Technology to Create Maps Using Drones and also get information of aerial photogrammetry, drone photogrammetry which can be used in Geographical informational system industries
Satellite image processing is an intricate task that requires vast computation and data processing, which cannot
be handled by a single computer. Furthermore, the processing of the massive amount of data accumulated by
the satellite is a huge challenge for the end user. Hence, grid computing is the essential platform to provide high
computing performance at the user end. This article reviews the grid services used for satellite image processing
and significant data processing.
Satellite Image Processing technique to enhance raw images received from cameras or sensors placed on satellites, space probes and aircrafts or pictures taken in normal day to day life in various applications.
Learn and get aware about the role of Photogrammetry in GIS. How it provides a general framework for describing what Photogrammetry is, how it can be useful in GIS by making use of photographs to study the areas and give the quantitative measures of the photographed area.
A Vision-Based Mobile Platform for Seamless Indoor/Outdoor PositioningGuillaume Gales
The emergence of smartphones equipped with Internet access, high resolution cameras, and posi- tioning sensors opens up great opportunities for visualising geospatial information within augmented reality applications. While smartphones are able to provide geolocalisation, the inherent uncertainty in the estimated position, especially indoors, does not allow for completely accurate and robust alignment of the data with the camera images.
In this paper we present a system that exploits computer vision techniques in conjunction with GPS and inertial sensors to create a seamless indoor/outdoor positioning vision-based platform. The vision-based approach estimates the pose of the camera relative to the fac ̧ade of a building and recognises the fac ̧ade from a georeferenced image database. This permits the insertion of 3D widgets into the user’s view with a known orientation relative to the fac ̧ade. For example, in Figure 1 (a) we show how this feature can be used to overlay directional information on the input image. Furthermore we provide an easy and intuitive interface for non-expert users to add their own georeferenced content to the system, encouraging volunteering GI. Indeed, to achieve this users only need to drag and drop predefined 3D widgets into a reference view of the fac ̧ade, see Figure 1 (b). The infrastructure is flexible in that we can add different layers of content on top of the fac ̧ades and hence, this opens many possibilities for different applications. Furthermore the system provides a representation suitable for both manual and automatic content authoring.
Presentation by Chris Grundy of LSHTM which describes his use of satellite images for population estimation and surveys, as well as mapping work performed by the online mapping community and NGOs to improve crowd sourced mapping data.
Photogrammetry: Latest Technology to Create Maps Using Drones?NI BT
To know more about Photogrammetry: Latest Technology to Create Maps Using Drones and also get information of aerial photogrammetry, drone photogrammetry which can be used in Geographical informational system industries
Satellite image processing is an intricate task that requires vast computation and data processing, which cannot
be handled by a single computer. Furthermore, the processing of the massive amount of data accumulated by
the satellite is a huge challenge for the end user. Hence, grid computing is the essential platform to provide high
computing performance at the user end. This article reviews the grid services used for satellite image processing
and significant data processing.
Covenant University location navigation system (CU Naviloc) built on the Android
platform is a mobile based system which can be easily accessed from an android
mobile device across any location, downloadable on Google play store and
deployable anywhere in the world. In this study,Computer-aided design as well as
building Information modelling (CAD/BIM) system applications were introduced to
the simulation of Covenant University, a smart and compact campus whose edifice
elaborates the need for the development of a three dimensional (3D) virtual model of
locations as an advancement over the existing 2D model representation of maps on
the Google map and Google Earth platform. Therefore, this research work outlays the
development of three dimensional models (CU NAViLoc Model) for details of
information at Covenant University as well as the requirements for its development
and implementation for cooperate representation of the institution. A three
dimensional map of CU was packaged into a location navigation system and was
implemented using Unreal Engine, Trimble SketchUp and Revit to effect a user
friendly, smarter and multi-dimensional viewable user interface. CU Naviloc explore
the advantage of the rich benefits of building information models and geographic
information systems to build a free-roam navigator, based on a well-updated model of
Covenant University location map. The benefits of this system is not limited to 3D
capability, real time similarity, portability, no downtime on access, and progressive
scalability with zero or little loss of data. The usage of the CU Naviloc system
requires free download and installation of the app and internet presence.
[Paper research] GOSELO: for Robot navigation using Reactive neural networksJehong Lee
GOSELO: Goal-Direction Obstacle and Self-Location Map for Robot Navigation Using Reactive Neural Networks 라는 논문을 중심으로, mobile platform의 Path planning을 CNN으로 End-to-End 방식으로 수행하는 방법에 관하여 소개합니다.
광주과학기술원 인공지능 스터디 A-GIST 모임에서 발표했습니다.
발표영상(유튜브, 한국어): https://youtu.be/l-gKjzWKuHA
With the rapid development of smartphone industry,
various positioning-enabled sensors such as GPS receivers,
accelerometers, gyroscopes, digital compasses, cameras, WiFi and Bluetooth have been built in smartphones for
communication, entertainment and location-based services.
Smartphone users can get their locations fixed according to
the function of GPS receiver.
Location Data - Finding the needle in the haystackLucy Woods
Here are a few sample sllides following Cambridge Wireless's (CW) Location Based Systems/Services Special Interest Group (SIG) event. Entitled 'location data - finding the needle in the haystack' we had speakers from Crossrail, GeoSpock, Autodesk and Advanced Laser Imaging. For more information about CW, head over to our website or email admin@cambridgewireless.co.uk
What we've done so far with mago3D, an open source based 'Digital Twin' platf...SANGHEE SHIN
mago3D = {Indoor, Outdoor} + {Overground, Underground} + {Objects, Phenomena} + {Static, Dynamic}
It would be awesome if you can have a virtual replica of real world that you can play with and do the simulation to see what would happen. That is 'Digital Twin', the ultimate goal of mago3D!
At the FOSS4G NA 2019, I talked about the recent achievements and improvements of mago3D project, an open source based 'Digital Twin' platform. mago3D(http://mago3d.com) is relatively new project that was first released in July 2017. The ultimate goal of mago3D project is developing an open source based digital twin platform that can replicate and simulate the real world objects, processes, and phenomena on web environment. mago3D is on its way to achieve this goal now. Currently mago3D more focuses on managing and visualization of various types of 3D data ranging from simple box style extrusion model, point clouds, realistic mesh, to complex BIM(Building Information Modeling), AEC(Architecture, Engineering, Construction) data. mago3D supports industry standards 3D formats such as IFC, CityGML, IndoorGML, 3DS, Collada DAE, OBJ, LAS, JT, and so on. mago3D has been used in various industry sectors including ship building, urban management, indoor data management, and national defense. In this talk I showcased several real projects that had employed the mago3D and talked about what I'd learned during this projects. I also talked more about the future plan of mago3D towards visualizing/simulating of {static and dynamic data}, {underground and overground features}, {indoor and outdoor spaces}, {objects and phenomena} at the same time on web browser.
As a tech-savvy country, there're lots of discussions and activities around digital twin in Korea. I also shared my real experiences on this in this talk.
A L -H ARM E XPANSION M OVIE B ASED ON V IRTUAL R EALITYcsandit
Animated movies are excellent virtual environments
for creating models in high quality.
Animated movies can include 3D models, sounds and l
ights effects, and detailed maps. In this
paper, a virtual reality movie is applied to Al-Har
am Expansion stages including the future
stage of expansion. 3DMAX program is used to rich t
he maximum benefits of using 3D
modeling. Maps with details are built by using ARCG
IS program in order to understand the real
difference between the three different expansions s
tages clearly and effectively. A novel
technique is presented in order to insert 2D maps a
nd other details in the 3D model built by
3DMAX
Rendering Process of Digital Terrain Model on Mobile DevicesWaqas Tariq
Digital Terrain Model has been used in many applications especially in Geographical Information System applications. However with the recently improved mobile devices that can support 3 Dimension (3D) content, rendering 3D based terrain on mobile devices is possible. Although mobile devices have improved its capabilities, rendering 3D terrain is tedious due to the constraint in resources of mobile devices. Furthermore, rendering DTM add more constraint and issues to the mobile devices. This paper focuses on the rendering processes of DTM on mobile devices to observe some issues and current constraints occurred. Also to determined the characteristic of terrain properties that will affect the rendering performance. Experiments were performed using five datasets that derived from aerial images. The experimental results are based on speed of rendering and the appearance of the terrain surface. From these results, issues and problems that highlighted in this paper will be the focus of future research.
Introduction to mago3D, an Open Source Based Digital Twin PlatformSANGHEE SHIN
This talk was given at the Busan Eco Delta City(Korea National Pilot Smart City) technical workshop held on 18th July. I talked about introduction and history of mago3D, some core technologies, real cases, and lessons learnt in this workshop.
With the development of autonomous development
technology, the need for additional applications to be used
inside and outside the vehicle is increasing. As a result of the
literature review, many applications have been developed to
display vehicle data directly on the monitor, with reflections
on glass, and on hardware devices. These applications have
been developed only for a defined problem and for a
particular autonomous system. In this study, a basic
autonomous vehicle software infrastructure and mobile
Augmented Reality application that can work on Android
devices have been developed. The Mobile Augmented Reality
app serves inside and outside the vehicle. In addition, this
application has been shown to support multiple autonomous
system infrastructures.
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CrowdMap: Accurate Reconstruction of Indoor Floor Plan from Crowdsourced Sensor-Rich Videos
1. CrowdMap: Accurate Reconstruction of
Indoor Floor Plans from Crowdsourced
Sensor-Rich Videos
Si Chen, Muyuan Li, Kui Ren, Chunming Qiao
Department of Computer Science and Engineering
University at Buffalo – State University of New York
2. Page 2
Outline
1. Introduction
2. System Architecture and Design Details
3. Implementation and Evaluation
4. Future Work
4. Page 4
Indoor Maps (Floor Plans)
Unlike outdoor environment, acquiring digital indoor floor plan information
is very challenging.
The state-of-the-art Google Indoor Maps only have 10,000 locations
available worldwide, which is not in a position to compete with the total
number of indoor environments around the world.
5. Page 5
Indoor Maps
The complexity of the indoor environment is the major obstacle to
achieve ubiquitous coverage.
Existing centralized collection and on-site calibration techniques
demand professional devices and multi-party coordination, which are time
consuming, inconvenient and costly.
Google Trekker http://www.navvis.lmt.ei.tum.de/about/
8. Page 8
Indoor Floor Plan Reconstruction by Crowdsourcing
There have been several studies trying to explore the possibility of using
crowdsourced inertial sensory data to generate an indoor floor plan
automatically.
Alzantot, Moustafa, and Moustafa Youssef. "Crowdinside: automatic construction of indoor
floorplans." Proceedings of the 20th International Conference on Advances in Geographic Information
Systems. ACM, 2012.
9. Page 9
Drawback of Inertial Sensor Only Methods
However, current crowdsourcing floor plan reconstruction systems are not
able to produce accurate enough results.
– Most of existing indoor floor plan reconstruction systems heavily rely on inertial
data.
The premise of their work is that users would be
able to move across all edges and corners in
an indoor environment.
• the edge of an indoor scene is usually
blocked by furniture or other objects,
• some restricted areas in an indoor
environment are also inaccessible for most
of the users
Visual information preserve more context information for an unknown
indoor environment, such as the geometric information, color information,
lighting conditions and text information.
[1].http://www.sigmobile.org/mobicom/2014/talks/slides_6_3.pdf
[1]
10. Page 10
CrowdMap: Key Idea
CrowdMap: An accurate indoor floor plan reconstruction system based on
sensor-rich videos.
Key idea: leverage the spatio-temporal relationship between each
consecutive frame of the crowdsourced video.
12. Page 12
Outline
1. Introduction
2. System Architecture and Design Details
3. Implementation and Evaluation
4. Future Work
13. Page 13
CrowdMap: System Architecture
mobile front-end
cloud back-end
i) crowdsourced data
collection module
ii) indoor path modeling
module
iii) room layout modeling
module
iv) floor plan modeling module
14. Page 14
CrowdMap: Crowdsourced Data Collection Module
We assume that users actively get involved in the data collecting tasks.
Example: a user opens our mobile application and inputs the floor
number, starts capturing the room environment by spinning his/her body
(SRS task); then, walks towards the hallway (SWS task).
The walking distance |AB| is calculated by the step counting method. In
addition, the direction change of each step ∆𝜔 is calculated by jointly
using compass, gyroscope and accelerometer.
15. Page 15
CrowdMap: Crowdsourced Data Collection Module
By using the inertial sensor data, we are able to reconstruct the
trajectory of the user when they perform the SWS task.
16. Page 16
CrowdMap: Indoor Path Modeling Module
How to aggregate multiple user trajectories and reconstruct the path of
the floor?
17. Page 17
CrowdMap: Indoor Path Modeling Module
[1].Bay, Herbert, Tinne Tuytelaars, and Luc Van Gool. "Surf: Speeded up robust features." Computer
vision–ECCV 2006. Springer Berlin Heidelberg, 2006. 404-417.
We select the state-of-the-art SURF [1] algorithm to precisely match two
candidate key-frames
20. Page 20
CrowdMap: Indoor Path Modeling Module
We use multiple key-frames to determine whether the two user
trajectories can be merged.
If there is a match between the two trajectories generated in the same
floor, there should be a common path between them in a high
probability. Hence, we use the longest common subsequence to
capture this notion.
Where Ta and Tb are the two user trajectories with length of i
and j, respectively. Parameter 𝛿 represents the maximum
length difference between two user trajectories and 𝜀 is the
distance threshold.
22. Page 22
CrowdMap: Room Layout Modeling Module
We utilize crowdsourced images to create the panorama for each
place, and then use computer vision techniques to process the
panorama, and thereby, generate the room layout.
35. Page 35
Outline
1. Introduction
2. System Architecture and Design Details
3. Implementation and Evaluation
4. Future Work
36. Page 36
CrowdMap: Future Work
We will focus on further processing of the room panorama to extract
more context information of the room:
• object detection
• object recognition.
We also plan to further study several issues:
• user incentive mechanism
• privacy preservation mechanism.