Thermal Overlay

The overlay window features on-screen text on the bottom of the image that displays settings including temperature range, overlay opacity, and average temperature being read by the sensor.

Tool Bar

We're using OpenCV for this project because it has a built-in toolbar at the top of the app window. This toolbar has buttons for zooming in and out and saving images with the overlay. When you save an image, it is stored in the same directory where the script is saved.

Keyboard Controls

The following keyboard keys can be used to quickly adjust settings. 

• Up Arrow - Increases the maximum temperature range
• Down Arrow - Decreases the maximum temperature range
• Left Arrow - Decreases the minimum temperature range
• Right Arrow - Increases the minimum temperature range
• = Key - Increase the overlay opacity
• - Key - Decrease the overlay opacity
• Q Key - Stops and exits the script