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Do you by any chance have a USB pen drive connected to your computer?

To recognize gestures, you need to capture images from a video camera and do an image recognition algorithm on it. Image recognition is easy if you know what object you are looking for. It basically involves colors. For example, assume you are looking for a green box in a black background. In your algorithm, you just need to keep processing the image (RGB values) and keep looking for the color green. Now there are two steps to this process: 1) image recognition: here you look for object until it appears in your frame 2) finding the position and size of the object: once you know that you have found your object, you begin to find its dimensions. Then, using basic trigonometry, you find its position

Is there a prize?

It is based on a self-learning process. The software stores the conversations it has with previous users and re-uses the earlier conversations if the same topic comes up later.

A capacitor will release energy if it has any charge in it (not necessarily full charge). To release energy, a capacitor needs a suitable current.

Processor 2 would be bigger and cost more, but would be a lot (around 4 times) faster. Processor 1 would be smaller and cheaper but slower than Processor 2. If you are looking for speed, go with Processor 2. If you are looking for cheap and small, go with Processor 1.