3D Annotation Projection for Consistent Oblique Imagery Views
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Solution Overview
Problem
Existing systems face challenges in efficiently visualizing and manipulating oblique aerial imagery datasets without the need for computationally complex stitching or normalization processes, due to scale variations and perspective distortions inherent in oblique images.
Innovation Solution
Utilize three-dimensional model data to project and reproject annotation feature overlays across different oblique imagery orientations, enabling consistent rendering and depiction of annotations on oblique images without generating a composite image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If stitching or normalization processes are used to visualize oblique aerial imagery, then consistency across different orientations is improved, but computational complexity increases
Solution Approach 1:
The patent uses 3D model data as an intermediary to bridge the gap between different oblique imagery orientations. By projecting annotation features onto the 3D model and then reprojecting them onto the target oblique image, the system achieves consistent visualization without direct stitching or normalization of the oblique images themselves. This intermediary 3D representation simplifies the computational process while maintaining accuracy.
Solution Approach 2:
The patent creates a copy of the annotation features in 3D space by projecting them onto a 3D model. This 3D copy can then be reprojected onto any oblique imagery orientation, allowing the same annotation to appear consistently across multiple views without reprocessing the original imagery. This copying approach in 3D space avoids the computational burden of direct image stitching.
2Area of stationary object
If composite images are generated from multiple oblique images, then scene coverage is improved, but processing time and computational resources increase
Solution Approach 1:
The patent extracts only the necessary 3D model data and annotation features from the multiple oblique images, rather than processing and stitching the entire image datasets. By working with extracted 3D representations and annotation projections, the system achieves comprehensive scene coverage with significantly reduced processing time and computational resources.
3Adaptability or versatility
If annotation features are projected onto oblique images from different orientations, then versatility of visualization is improved, but maintaining consistency across perspectives becomes more difficult
Solution Approach 1:
The patent transitions from 2D oblique image space to 3D model space for annotation feature processing. By projecting annotations onto the 3D model and then reprojecting them onto different oblique views, the system maintains consistency across perspectives while enabling versatile visualization from multiple orientations. This dimensionality change to 3D space provides a stable reference framework.
Data Source
AI summary
Described are systems and techniques for visualization and manipulation of non-composite oblique aerial imagery. Information can be obtained for an annotation feature for overlay on a displayed oblique image with an oblique viewpoint of a scene within a geographic area. Three-dimensional (3D) model data can be obtained for a portion of the geographic area and including 3D information of object surfaces within the scene. A 3D representation of the annotation feature can be generated using the 3D model data and georeferenced coordinates determined for the annotation feature. An oblique projection of the 3D representation of the annotation feature into the oblique viewpoint of the scene can be generated to include portions of the annotation feature unobstructed by the object surfaces within the scene. The oblique projection of the annotation feature can be output as a two-dimensional (2D) overlay on the displayed oblique image.