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Introduction
During the COVID crisis, people find it more important than ever to control their office facilities without physical touch. The touchless control should be what we pursue in the future. Although we already have sound-controlled or simple IR-controlled light switches, it is not likely to change the brightness of the object light bulb with them. In this case, a camera based gesture control switch came up in our mind. It has to be simple to use, flexible enough to change the room brightness, and most important, touchless.
In this project, we use a thermal camera to identify human hands, according to different gestures we detect, we can gradually increase/decrease the brightness the of the light device, and we can, of course, turn it off in one gesture.
The camera we use is a thermal camera, it catches the temperature of the object in its viewfinder, we verify the hand object by a temperature signal around 30-34 degrees. Once we recognize an object to be human hand, and in a controlling gesture, we send controlling signal via WiFi to our smart light bulb, to change the brightness of it.
Thermal cameras are indeed more expensive than normal webcams, but this is a scene where the camera acts as a light switch. Most of the time, we turn on the lights when natural light is not enough or in complete darkness, gesture recognition algorithms don't work so well in the dark, but thermal cameras remains as reliable as in daytime.
They have very good developer supportance. Widely used, and very reliable.
Three. Increase, decrease and turn off.
Please see in Hardware and Software
Please see in How to Use