Imaging Apparatus Tracking Position Stabilization
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Solution Overview
Problem
Existing imaging apparatuses face instability in tracking positions due to subtle differences in lighting and other factors, leading to frequent changes in tracking positions when multiple regions with similar characteristics are present in the image, causing the tracking device to operate unstably.
Innovation Solution
The apparatus includes an optical system, an imaging unit, an extractor for a reference image, a first detector for obtaining similar images, a calculator for determining the positional relationship between images, and a position detector that stabilizes the tracking position by using a combination of template matching and binarized similarity maps to identify and maintain the correct focus point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If template matching calculation is used to extract the most similar region, then the tracking position can be determined, but the tracking position circles around within the similar color area causing unstable operation
Solution Approach 1:
The patent segments the similar region extraction process into multiple stages: first extracting candidate regions based on color similarity, then evaluating multiple candidates using multiple metrics (color difference, position difference, area ratio), and finally selecting the optimal tracking position through comprehensive comparison. This segmentation prevents premature convergence to incorrect positions and ensures stable tracking.
2Quantity of substance
If the area of the front surface of the train increases as the train comes closer, then more regions have similar color characteristics, but the most similar position changes depending on subtle differences causing tracking position to shift
Solution Approach 1:
The patent changes multiple parameters simultaneously for comprehensive evaluation: color difference parameters, position difference parameters, and area ratio parameters. By considering multiple parameters rather than relying solely on color similarity, the system can distinguish the correct tracking position from other similarly colored regions even when the subject approaches and expands in the frame.
3Adaptability or versatility
If multiple regions with similar characteristics are present in the image, then template matching may identify multiple candidates, but it becomes difficult to determine one tracking position
Solution Approach 1:
The patent implements feedback mechanisms where each candidate region is evaluated against multiple criteria, and the evaluation results feed into the final selection process. The system continuously compares candidates based on color difference, position difference, and area ratio, using this feedback to eliminate incorrect candidates and converge on the correct tracking position, making the determination process robust even with multiple similar regions present.
Data Source
AI summary
An imaging apparatus includes an optical system; an imaging unit; an extractor that extracts a part of a first image as a reference image, the first image being received via the imaging unit; a first detector that obtains a first similar image from within the first image, the first similar image having a characteristic similar to a characteristic of the reference image; a calculator that obtains a positional relationship between the first similar image and the reference image; a second detector that obtains a second similar image from within a second image, the second image being received via the imaging unit later than the first image, the second similar image having a characteristic similar to the characteristic of the reference image; and a position detector that detects a position of a corresponding part of the second similar image in accordance with the positional relationship.