3D modeling of interior spaces: Learning the language of indoor architecture. Kourosh Khoshelham Lucia Díaz-Vilariño
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1 3D modeling of interior spaces: Learning the language of indoor architecture Kourosh Khoshelham Lucia Díaz-Vilariño
2 NEED FOR 3D INDOOR MODELS Crisis management in large public buildings Automated route generation and navigation From: ISPRS Technical Commission V Symposium, June 2014 Model from 2 FZKViewer
3 3D INDOOR MODELING: THE CHALLENGE Manual modeling: Can take months depending on the complexity of the building and the required level of details. Automated modeling: Should be able to handle a large variety of indoor architectures. The Cubicus building in the UT campus. ISPRS Technical Commission V Symposium, June
4 INDOOR ARCHITECTURAL DESIGN Characterized by: Repetition Regularity Creativity Andrea Palladio ( ) Example: Palladian indoor designs ISPRS Technical Commission V Symposium, June
5 PALLADIAN GRAMMAR (SIMPLIFIED) Rule 1: Make a grid of rectangular spaces Repetition Regularity ISPRS Technical Commission V Symposium, June
6 PALLADIAN GRAMMAR (SIMPLIFIED) Rule 2: Collapse some of the walls Creativity Rule 3: Insert aligned doors and windows ISPRS Technical Commission V Symposium, June
7 A SHAPE GRAMMAR FOR INDOOR MODELING Starting symbol (S): a unit cube Rule 1: place a cuboid If there are points on its ceiling Rule 2: connect two cuboids If they are not separated by a wall Rule 3: merge two cuboids If they have a common face S - R 1 - R 1 - R 1 - R 2 - R 2 - R 3 - R 3 - R 3 - R 3 ISPRS Technical Commission V Symposium, June
8 LEARNING GRAMMAR RULES FROM A POINT CLOUD Rotate point cloud such that walls are aligned with x- and y- axes; Location and size of cuboids from histogram of x, y, z coordinates; Constraint: each cuboid should have points on its top face. Points-on-ceiling index: ISPRS Technical Commission V Symposium, June
9 LEARNING GRAMMAR RULES FROM A POINT CLOUD Connecting based on: 1. Adjacency in the initial grid; 2. If the connecting cuboid is not on an interior wall. Points-on-wall index: ISPRS Technical Commission V Symposium, June
10 SEPARABILITY OF WALLS AND EMPTY SPACES Using Points-on-Wall index: ISPRS Technical Commission V Symposium, June
11 LEARNING GRAMMAR RULES FROM A POINT CLOUD Merging based on: 1. If two cuboids have a common face; 2. If both are non-terminal. ISPRS Technical Commission V Symposium, June
12 EXPERIMENTS Simulated point cloud two-storey; multiple spaces Real point cloud ISPRS Technical Commission V Symposium, June
13 RESULTS Simulated 1 st floor: Initial cuboids (rule 1) ISPRS Technical Commission V Symposium, June
14 RESULTS Simulated 1 st floor: Connected cuboids (rule 2) Merged cuboids (rule 3) ISPRS Technical Commission V Symposium, June
15 RESULTS Simulated 2 nd floor: Initial cuboids (rule 1) ISPRS Technical Commission V Symposium, June
16 RESULTS Simulated 2 nd floor: Connected cuboids (rule 2) Merged cuboids (rule 3) ISPRS Technical Commission V Symposium, June
17 RESULTS Real point cloud: ISPRS Technical Commission V Symposium, June
18 RESULTS Real point cloud: Connected cuboids (rule 2) Merged cuboids (rule 3) ISPRS Technical Commission V Symposium, June
19 CONCLUSIONS Automated indoor modeling by learning grammar rules from a point cloud; Convenient method to create BIM/cityGML models (can provide volumetric solids + surfaces + semantics) Adjacency relationships are inherent in the cuboids and can be transferred across rules; Non-navigable spaces can be modeled as well using the pointson-wall index. Future work: Addition of semantic rules; Extension to handle non-manhattan-world structures. ISPRS Technical Commission V Symposium, June
20 THANK YOU! 3 PhD positions related to photogrammetry and laserscanning INACHUS Technological and Methodological Solutions for Integrated Wide Area Situation Awareness and Survivor Localisation to Support Search and Rescue Teams. 20+ partners. Our task: UAV-based photogrammetry and satellite remote sensing to support first responders in finding victims Call for applications open till July 1 st (one position) Position estimation of mobile sensors using airborne imagery Mitigating the well-known GPS outage problem in urban canyons for mobile mapping platforms through integrated position and attitude estimation using nadir and oblique airborne imagery. Close cooperation with leading industry partners like Cyclomedia, Fugro and Topcon Sokkia. Two PhD positions, focusing on mobile laser scanning and mobile imagery, respectively. Call for applications open soon, please watch or contact Markus Gerke. Dutch Science Foundation Contact: Markus Gerke, m.gerke@utwente.nl ISPRS Technical Commission V Symposium, June
21 DEMO 1 ST FLOOR ISPRS Technical Commission V Symposium, June
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