Feature Request: Support for Linear Scale Interpretation (e.g. Thermometers, Rotameters)

[mortenx]

The Feature

Hi and thank you for this fantastic project!

I’d like to suggest a feature enhancement that would allow the AI-on-the-edge-device to interpret linear scales, such as those found on analog thermometers or rotameters.

Currently, the system is optimized for digit recognition (e.g. water meters), but many industrial and scientific instruments use a continuous scale with a moving indicator (e.g. fluid level, float, or needle). It would be incredibly useful if the device could:

1. Detect the position of the indicator within a defined Region of Interest (ROI).
2. Translate that position into a numerical value using a linear mapping (e.g. pixel position → temperature or flow rate).
3. Allow configuration of scale parameters (min/max values, orientation, calibration offset) via the web interface or config file.

This would open up new use cases for monitoring analog gauges in HVAC systems, lab equipment, and more.

Happy to provide sample images or help test if needed. Thanks again for your great work!

[kineticrob]

I could really use this feature too! I have an older boiler system, and it would be amazing to monitor the water level in the sight gauge for fluctuations over half an inch, aka surging. Thanks!