std::scoped_lock was introduced in C++17 and is strictly better than
std::lock_guard as it supports locking any number of mutexes safely.
It's also easier to use than std::lock for locking multiple mutexes at
once.
In some cases, we don't want the cv requirement to get an image, for instance interop with other versions of opencv
This enables getting a raw image, and handling conversions from the user side.
