Cascaded Camera Imaging Balances Survey Accuracy and Processing Speed
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Solution Overview
Problem
Existing photogrammetry systems face inefficiencies in capturing high-resolution aerial imagery due to conflicting requirements of redundancy for accurate positioning and rapid survey completion, leading to high costs and time consumption.
Innovation Solution
Employing a cascaded camera system with one camera set capturing overview images at high redundancy and another set capturing detail images at low redundancy, minimizing overlap in detail images to reduce redundant data and processing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high redundancy is used in all captured images to ensure accurate positioning, then measurement precision is improved, but productivity deteriorates due to increased data storage and processing requirements
Solution Approach 1:
The patent divides the imaging system into two separate camera sets: one dedicated to capturing overview images with high redundancy for positioning accuracy, and another dedicated to capturing detail images with low redundancy for efficient data processing. This segmentation allows each subsystem to optimize for its specific function, resolving the contradiction between measurement precision and productivity.
2Reliability
If high redundancy is maintained across all images, then reliability is improved, but loss of substance worsens due to excessive data storage requirements
Solution Approach 1:
The patent applies different redundancy qualities to different types of images: overview images maintain high redundancy to ensure positioning reliability, while detail images use low redundancy to minimize data storage requirements. This local differentiation of quality attributes allows the system to achieve reliable positioning without the excessive data storage burden of uniformly high redundancy across all images.
3Measurement precision
If overlap is increased in detail images to improve positioning accuracy, then measurement precision is improved, but productivity deteriorates due to increased processing time
Solution Approach 1:
The patent segments the positioning function between two camera sets: the first camera set captures overview images with high overlap and redundancy to establish positioning accuracy, while the second camera set captures detail images with minimal overlap for rapid processing. This segmentation eliminates the need to process high-overlap detail images, thereby reducing processing time while maintaining positioning precision through the overview images.
Data Source
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AI summary
A method and system are presented in which images are captured from overview and detail imaging devices such that overview images are created with a first degree of redundancy, and detail images are captured with less overlap and a second degree of redundancy.