Can someone please Tell me what’s this called

One-Line Portrait, Continuous Line Portrait

Explanation:

The art style may be referred to as Salventius, a famous artist know for one-line portraits.

1. eadweard muybridge creates series photography - 1877

2. the kinetograph - 1889

3. philo farnsworth - 1929

4. kodak introduces kodachrome - 1935

5.   once upon a time in mexico was the first film to be shot digitally - 2003

i hope this ! : )