Oleksii Kuchuk "Reading gauge values with open cv imgproc"
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This document discusses using OpenCV to read gauge values. It describes using Canny edge detection and Hough transformations to detect lines in an image of a gauge. The Hough transform is applied to the edge detected image to find 11 lines representing the gauge. The inclination and speed values are then calculated from the lines' rho and theta parameters. While OpenCV image processing works well for this, preprocessing must be chosen carefully and detection errors can occur.
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Oleksii Kuchuk "Reading gauge values with open cv imgproc"