We've all been driving down a highway and forgotten what the most recent speed limit sign was. This often happens in remote locations, where connection to a database is unreliable.
What it does
Our project uses a webcam to scan for speed limit signs, and then uses a LCD to display the most recent sign passed.
How we built it
We use openCV to identify speed limit signs in a scene, and use OCR to extract the text of the sign.
Challenges we ran into
The raspberry pi camera was difficult to work with, as well as making the USB webcam work alongside the pi. The C++ libraries were difficult to keep synced across multiple operating systems, and compiling took a significant amount of time as well.
Accomplishments that we're proud of
We were able to successfully identify speed limit signs in photos that we took. The LCD backlight automatically adjusts to the brightness of its environment, using an analog photoresistor and op-amp circuit.