Counting objects is an ideal task for automation, and when focusing on a single type of object, there are many effective solutions. But what if you need to count hundreds of different objects? That’s ...

Is it possible to count objects you can't see? If you've ever received a boxed gift, or a mysterious package from Amazon, you might have tried to lightly shake the box to try to guess its contents.

Are there any freely-available tools to count how many moving objects are in a video clip? That's a 5-second sample, and I can make a clip of any length, but in this particular case I'm not concerned ...