[philippnagel]

It is super annoying. For example every time I visit a site implementing Google reCAPTCHA I am asked to select cars or signs on photographs.

As a dev that cares about UX I wondered whether there are better solutions or ideas out there.

[dpandya]

Google also offers "checkboxes" that measure your mouse movement to see if you're a human. Maybe those are more to your tastes?

[dangrossman]

That's the same service. If Google's confidence that you are human is not high enough, they don't show the checkbox, they show the "click all the images that are [label]" test instead.