Orthographic Street Elevation Generation
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Solution Overview
Problem
Current digital mapping systems, such as online mapping services, primarily offer three-dimensional renderings or panoramic street views with conical projections, which do not provide a clear two-dimensional front elevation image of streets for accurate architectural representation.
Innovation Solution
A computer-implemented method that generates a two-dimensional front elevation image of a street by obtaining a three-dimensional digital model, identifying facades oriented towards the street, and applying orthographic projection onto a projection plane to create a facade representation without vanishing points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conical projection system is used for street views, then panoramic images can be captured at street level, but vanishing points are introduced that distort architectural representation
Solution Approach 1:
The patent changes the projection parameter from conical to orthographic projection. This parameter change eliminates vanishing points while maintaining street-level viewing capability, thereby resolving the contradiction between ease of operation and architectural representation accuracy.
2Adaptability or versatility
If three-dimensional renderings are used, then city buildings can be visualized from aerial images, but clear two-dimensional front elevation images are not provided
Solution Approach 1:
The patent extracts the front elevation information from the three-dimensional digital model by applying orthographic projection. This extraction process isolates the facade information in a clear two-dimensional view, resolving the contradiction between multi-angle visualization and front elevation accuracy.
3Manufacturing precision
If orthographic projection is applied to building facades, then scale-proportional views are obtained, but the process requires three-dimensional digital model processing
Solution Approach 1:
The patent makes the orthographic projection system universal by integrating it with existing three-dimensional digital models from online mapping services. The system can process any building facade that has been digitally modeled, providing scale-proportional views without requiring complex custom processing for each building.
Data Source
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AI summary
A computer-implemented method for generating a two-dimensional front elevation image of a street, comprising a first stage (S1) in which a three-dimensional digital model of the street (S) is obtained, the three-dimensional digital model comprising three-dimensional graphical representations of buildings (B) of the street (S), the buildings (B) having facades (F), a second stage (S2) in which the facades (F) of the buildings (B) that are oriented towards the street (S) are identified, and a third stage (S3) in which the two-dimensional front elevation image of the street (S) is obtained from the three-dimensional digital model, the two-dimensional front elevation image of the street (S) being obtained by orthographic projection onto a projection plane (P) of the facades (F) of the buildings (B) that are oriented towards the street (S).