Automated Analog Gauge Reading With Template-Based Parallax Correction
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Solution Overview
Problem
Existing methods for automated reading of analog gauges are inefficient, expensive, and prone to errors due to parallax issues, focus problems, and gauge obscuration, making it difficult to collect digital data reliably.
Innovation Solution
A system and method that involves obtaining a reading image, creating or using a template configuration, processing the image relative to the template, and compensating for irregularities such as parallax errors, using computer-executable algorithms and image processing techniques to enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If cameras are mounted to gauge faces for automated reading, then automated data collection is enabled, but the gauge face is occluded and extensive wiring is required
Solution Approach 1:
The patent uses image processing software as an intermediary to capture and process gauge readings remotely. Instead of mounting cameras directly on gauge faces, the system captures images from a distance and uses computational algorithms to extract gauge values, eliminating the need for physical mounting and extensive wiring while enabling automated reading.
2Extent of automation
If existing gauge reading software is used to process images, then automated reading is attempted, but parallax errors and focus problems cause inaccurate readings
Solution Approach 1:
The patent applies parameter changes by adjusting image processing parameters such as focus correction, perspective transformation, and contrast enhancement to compensate for parallax errors and focus problems. The system dynamically modifies these parameters based on the captured image characteristics to achieve accurate readings even under suboptimal imaging conditions.
Solution Approach 2:
The system incorporates feedback mechanisms where the processed image and detected gauge values are validated against expected ranges. If anomalies are detected (such as parallax-induced distortions or focus issues), the system requests re-capture or applies corrective processing algorithms, ensuring only accurate readings are recorded.
3Measurement precision
If manual reading of gauges is performed frequently, then accurate data is collected, but time consumption and expense increase
Solution Approach 1:
The system enables self-service automated reading where the gauge reading process requires no human intervention. The camera captures images automatically at scheduled intervals, and the image processing software independently extracts gauge values without manual input, achieving both high accuracy and operational efficiency.
4Extent of automation
If analog gauges are replaced with digital gauges for automatic data transmission, then automated data collection is achieved, but cost and functional disruption increase
Solution Approach 1:
The patent creates a visual copy of the analog gauge face through image capture and processing. Instead of replacing the physical gauge with a digital device, the system captures the analog gauge's visual state and computationally transforms it into digital data, preserving the original gauge's simplicity while achieving automated data collection.
Data Source
AI summary
Provided herein is a method for enhanced automated reading of an analog gauge, the method including: obtaining a reading image of a target gauge, obtaining or creating a template configuration corresponding to the target gauge, processing the reading image relative to the corresponding template configuration, determining any irregularity in the reading image, and compensating for the determined irregularity. Also provided are systems for creating a template configuration for use in enhancing an automated reading of a target gauge value.