Detect points on the image

[severo]

Various options:

• by color
• detect QR codes in the image (see ...)
• other automatic / semi-automatic methods? See https://observablehq.com/d/b070fc45b0ff6ecd for example (naive detection of swimmers)

[Fil]

An option I'd like to integrate (maybe as a plugin?) is the persistence (in the topological data analysis / TDA sense) approach tested here: https://observablehq.com/d/10e11e390870a099 https://observablehq.com/d/34fd53cc090bdc66