3D Model Space Coordinate Correction Matrix
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Solution Overview
Problem
Three-dimensional city models often have inconsistent geometric accuracy and different coordinate frames due to variations in production time, mode, and geographic position, making integrated management difficult and requiring repetitive data reproduction for different projects, thus increasing production time and effort.
Innovation Solution
A method for correcting space coordinates of three-dimensional models by calculating a space coordinate correction matrix using control points in both original and target coordinate frames, allowing for transformation and storage of models in multiple coordinate formats, thereby reducing production costs and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If three-dimensional model data is produced in different coordinate frames for different projects, then the model can meet different project requirements, but repetitive work and time consumption increase
Solution Approach 1:
The patent applies preliminary action by pre-establishing a coordinate transformation relationship between different coordinate frames. The transformation matrix is calculated in advance based on control points, allowing rapid conversion between coordinate systems without repeating the entire data production process. This resolves the contradiction by preparing the transformation capability beforehand, enabling quick adaptation to different project requirements.
Solution Approach 2:
The patent utilizes parameter changes by transforming the coordinate system parameters (transformation matrix, origin coordinates, axis directions) rather than regenerating the entire three-dimensional model. By changing only the coordinate parameters and applying the transformation matrix to existing model data, the system efficiently adapts to different coordinate frame requirements while avoiding repetitive production work.
2Adaptability or versatility
If coordinate points are reproduced and remodeling is performed for different coordinate frames, then the model can be used in different projects, but production costs and effort increase
Solution Approach 1:
The patent applies copying by creating a transformed copy of the three-dimensional model in the target coordinate frame rather than producing a new model from scratch. The transformation matrix is used to copy and transform the existing model data, preserving all geometric information while changing the coordinate reference. This significantly reduces production effort compared to complete reproduction.
Solution Approach 2:
The patent implements universality by creating a universal transformation framework that can convert three-dimensional model data between any coordinate frames. The same transformation mechanism serves multiple projects and coordinate systems, making the production process universally applicable rather than requiring separate production efforts for each project.
3Adaptability or versatility
If three-dimensional model data is produced repeatedly for different coordinate frames, then the model can satisfy different project requirements, but production costs increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing the transformation matrix between coordinate frames. This preliminary computation allows rapid, low-cost conversion when new projects require different coordinate frames, avoiding the high cost of repeated data production while ensuring compliance with various project requirements.
Solution Approach 2:
The patent reduces production costs by changing only the coordinate parameters (transformation matrix application) rather than reproducing the entire model. This parameter-based transformation approach maintains geometric accuracy while significantly reducing the computational resources and costs associated with repeated model production.
Data Source
AI summary
A method for correcting space coordinates of a three-dimensional model includes: step S1, reading information of an original coordinate frame of a three-dimensional model in a first format and the origin of coordinates of the model; reading information of nodes from three-dimensional model data in the first format, and calculating original coordinates of the nodes; step S2, calculating parameters of correction between the original coordinate frame and a target coordinate frame; step S3, transforming and correcting the coordinates of the origin and nodes of the three-dimensional model in the first format one by one by using the space coordinate correction matrix to obtain information of coordinate points of the three-dimensional model in the second format; and step S4, storing a file of the three-dimensional model in the second format with corrected space coordinates. Also, a method for encrypting space coordinates of a three-dimensional model is provided.