OSAKA--The scourge of “upskirt” photography has sharply increased partly because of the wider availability of remote-controlled miniature spy cameras ... schools, hotel rooms and elsewhere.

Whether you’re capturing moments hands-free, translating foreign text on the fly, or navigating city streets with digital directions floating in your view, smart glasses with built-in cameras ...

Michelle Yan: So, we got our hands on some spy gear from Amazon. (These are so tiny). There's supposed to be some cameras hidden inside these normal-looking objects. Let's start with the clock.

We present tried-and-true methods for finding hidden cameras and where to look for spy devices. With our tips, you can ensure your privacy and safety during your hotel stay.