3D Reverse Modeling Using Photographic Images
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Solution Overview
Problem
Existing methods for three-dimensional reverse modeling of building structures without Building Information Model (BIM) data are costly and time-consuming, particularly when using three-dimensional scanners or high-density point cloud data generation.
Innovation Solution
A method and apparatus that utilize multiple photographic images captured from different angles, along with camera position and direction data, to generate a three-dimensional computer model by overlaying photographic images with projected three-dimensional models, allowing for user input to adjust and refine the model's accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If three-dimensional scanner is used to reversely model building structure, then modeling precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent uses photographic images as a substitute for three-dimensional scanner data. Instead of directly capturing 3D geometric data with complex scanning equipment, the system captures 2D photographic images and reconstructs the 3D model by processing these images through computer vision algorithms, thereby achieving modeling precision without the complexity of 3D scanning devices
Solution Approach 2:
The patent replaces the mechanical three-dimensional scanning system with a photogrammetric system using cameras. The mechanical 3D scanner is substituted by using multiple photographic images taken from different positions, and the 3D reconstruction is achieved through computational methods rather than direct mechanical measurement
2Measurement precision
If high-density point cloud data acquisition method is used, then modeling precision is improved, but time consumption increases
Solution Approach 1:
Instead of acquiring complete high-density point cloud data from all possible viewpoints, the patent uses a selective approach by capturing photographic images only from strategically selected positions. This partial action approach reduces the total number of images needed while still achieving sufficient 3D reconstruction precision through intelligent image selection and processing algorithms
3Measurement precision
If three-dimensional scanner is used for reverse modeling, then modeling precision is improved, but cost increases
Solution Approach 1:
The patent replaces expensive three-dimensional scanning equipment with ordinary photographic cameras. Instead of investing in costly 3D scanners, the system uses inexpensive digital cameras to capture images that can be processed to generate 3D models, significantly reducing equipment costs while maintaining acceptable modeling precision for building structure analysis
4Measurement precision
If conventional reverse modeling method is used, then modeling precision is maintained, but productivity decreases
Solution Approach 1:
The patent implements an automated continuous processing workflow where photographic images are captured, processed, and converted to 3D models through a streamlined computational pipeline. This continuous automation eliminates manual intervention steps and accelerates the reverse modeling process, significantly improving productivity while maintaining precision through robust image processing algorithms
Data Source
AI summary
Provided are an apparatus and method of three-dimensional reverse modeling of a building structure by using photographic images, and more particularly, to an apparatus and method of three-dimensional reverse modeling of a building structure by using photographic images, in which three-dimensional modeling data of a building structure may be quickly and conveniently reversely modeled by using a plurality of photographic images. According to the apparatus and method of three-dimensional reverse modeling of a building structure by using photographic images, three-dimensional modeling data of a building structure may be reversely modeled by using photographic images of the building structure captured using a camera, at low costs and quickly and easily, thereby remarkably increasing the productivity of the manufacture of a building information model (BIM).