Tesseract is an open source OCR or optical character recognition engine and commandline program. OCR is a technology that allows for the recognition of text characters within a digital image. With the latest version of Tesseract, there is a greater focus on line recognition, however it still supports the legacy Tesseract OCR engine which recognizes character patterns.
Tesseract can recognize over 100 languages out-of-the-box, and can be trained to recognize other languages. ...
Count the number of people around you by monitoring wifi signals
...You will be prompted for the WiFi adapter to use for scanning. Make sure to use an adapter that supports "monitor" mode. You can modify the scan time, designate the adapter, or modify the output using some command-line options.