This project help people use internet map to find their place, then print it by a thermal printer.
1. Capture the map screen into a picture
2. Turn the colorful picture into grey picture. And use the threshold algorithm to turn picture into mono picture.
3. Print the picture by a thermal printer in graphic mode.
This project use libusb, graphic algorithm, http server realize, thermal printer layout driver. It was implemented by LaoLiang@SZDIY in 2014.