Interpolation Processor for Projection Image Artifact Suppression
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Solution Overview
Problem
Existing projection image calibration methods face accuracy issues due to artifacts caused by erroneous interpolation processing, particularly in detecting pixel positions, which degrades the accuracy of geometric correction and calibration of projection devices.
Innovation Solution
An information processing device that performs interpolation processing based on interpolation direction information specific to test patterns projected by a projection device, using an interpolation processor to accurately determine pixel positions by adapting interpolation direction according to the test pattern's correlation direction, thereby preventing artifacts and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If adaptive interpolation processing is performed to maintain or improve resolution, then image quality is improved, but artifacts occur when interpolation direction detection is erroneous
Solution Approach 1:
The patent applies preliminary action by detecting the interpolation direction from the test pattern before performing interpolation processing. The system analyzes the test pattern's correlation direction (horizontal or vertical stripes) in advance, determines the appropriate interpolation direction, and then executes interpolation along that predetermined direction. This prevents artifacts by ensuring interpolation is always performed in the correct direction rather than attempting adaptive detection during processing.
2Manufacturing precision
If interpolation processing is performed without direction control, then resolution is maintained, but pixel position detection accuracy degrades due to artifacts
Solution Approach 1:
The system performs preliminary analysis of the test pattern to determine its correlation direction (horizontal or vertical) before interpolation. This predetermined direction information is then used to guide the interpolation processing, ensuring that pixel positions are accurately reconstructed without artifacts that would compromise detection accuracy.
3Device complexity
If general interpolation processing is applied to all test patterns, then processing is simplified, but accuracy decreases for high-frequency patterns
Solution Approach 1:
The patent applies local quality by adapting the interpolation direction to the specific characteristics of each test pattern. Instead of using a uniform interpolation approach for all patterns, the system analyzes each test pattern's correlation direction (horizontal or vertical stripes) and applies interpolation specifically aligned with that pattern's orientation. This ensures high-frequency patterns are processed with the appropriate directional sensitivity.
Solution Approach 2:
The system dynamically adjusts the interpolation direction based on the test pattern being processed. Rather than using a fixed interpolation method, the interpolation direction is determined in real-time according to the correlation direction detected from each specific test pattern, allowing the processing to adapt to different pattern frequencies and orientations.
Data Source
AI summary
An artifact upon imaging degrades sensing accuracy of a projection image. An information processing device that develops a captured image thus performs interpolation processing using interpolation direction information according to a test pattern projected by a projection device. In other words, the interpolation processing of pixel information in an interpolation direction according to the obtained interpolation direction information is performed with respect to an image signal obtained by capturing the projection image of the test pattern. This can suppress the artifact and improve the sensing accuracy.