Projection Surface Feature Detection Across Multiple Patterns
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Solution Overview
Problem
Existing methods for extracting feature points from projection surfaces are inaccurate due to the dependence on the type of pattern projected, and users lack guidance on improving accuracy.
Innovation Solution
A display method and program that superimpose indication images on captured images of different patterns projected onto a projection surface, highlighting feature portions to enhance detection accuracy by combining multiple algorithms and environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single pattern is used for feature point extraction, then the extraction process is simple, but the accuracy varies depending on the pattern type
Solution Approach 1:
The patent divides the feature point extraction process into multiple segments by using different patterns (first pattern and second pattern) for different extraction operations. Each pattern is optimized for specific extraction scenarios, allowing the system to segment the overall extraction task into manageable parts with higher individual accuracy.
Solution Approach 2:
The patent changes the pattern parameter by projecting different types of patterns (e.g., different geometries, densities, or configurations) onto the projection surface. This parameter change allows the system to adapt to various extraction needs and improve accuracy by selecting the appropriate pattern parameter for each specific feature point extraction task.
2Reliability
If multiple patterns are used for feature point extraction, then the accuracy and robustness improve, but the system complexity increases
Solution Approach 1:
The patent implements a multi-functional pattern projection system where the same projection device can project multiple different patterns (first pattern and second pattern) onto the projection surface. This universal capability allows the system to handle various feature point extraction scenarios with a single device, improving reliability without requiring multiple separate systems.
Solution Approach 2:
The patent introduces dynamic pattern selection where the system can switch between different patterns based on the extraction requirements and environmental conditions. This dynamic adaptability allows the system to maintain high reliability across different scenarios while managing complexity through intelligent pattern selection rather than fixed complex hardware.
3Loss of information
If feature points are extracted without visual indication, then the processing is faster, but the user cannot grasp which pattern improves accuracy
Solution Approach 1:
The patent uses visual indication by superimposing indication images that highlight extracted feature portions with distinct visual markers. Different colors or visual styles are used to indicate features extracted from different patterns, allowing users to quickly understand which pattern produced which extraction result without losing processing speed.
Solution Approach 2:
The patent creates visual copies or representations of the extracted feature portions through indication images that are superimposed on the captured images. These indication images serve as visual copies that convey extraction results and pattern effectiveness information to users without requiring additional physical measurements or time-consuming analysis.
Data Source
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AI summary
A projection apparatus includes a projector configured to project an image onto a projection surface and a camera configured to capture the image of the projection surface. An information processing apparatus, configured to communicate with the projection apparatus, displays a first superimposition image with a first indication image superimposed on a first image. The first image is based on a capture image acquired by the camera imaging the projection surface with a first pattern projected. The first indication image indicates a feature portion corresponding to an edge detected from the captured image. The apparatus also displays a second superimposition image with a second indication image superimposed on a second image. The second image is based on a capture image acquired by the camera imaging the projection surface with a second pattern projected. The second indication image indicates a feature portion corresponding to an edge detected from the second captured image.