Researchers at the Institute of Advanced Media Arts and Sciences in Japan, have developed a tiny camera that takes photos using your hands as a frame for the photo, and the device is called the Ubi-Camera.
The video below shows the Ubi-Camera in action, and this tiny camera features a range sensor, and the framing of the photo is determined on the distance between the camera and the person shooting the photos face.
“When you draw a picture or take a photo, you sometimes form a rectangle with your hands to decide the composition. With this camera, you can take a photo using the exact same motion. You attach this device to your index finger, and form a rectangle with your finger like this. You take the photo by using the rectangle as the viewfinder, like this. When you push hard with your thumb, the shutter is pressed.”