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Intelligent screen ruler for Linux with image edge detection (alternatiave for Microsoft PowerToys Ruler)

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So Microsoft has this PowerToys screen ruler with smart image edge detection to measure distance between objects on the screen. It looks really nice. I am wondering if there is such an app for Linux. I could not find anything so far. I only found very simple screen rulers like this screenruler.

It also seems like a relatively simple app to create using tools like OpenCV to detect edges in an image and measure distance between them.

enter image description here

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