Depth camera basics
The depth camera is a camera device that captures depth images. The value of a depth image pixel is not equal to light's brightness, or color, but equal to a distance from the camera to the corresponding part of the object. The main types of such cameras are the following:
Time-of-flight camera: It emits a laser beam and waits for this signal to come back. By measuring the time between emission and receipt of the beam, and using the known speed of light, it computes the distance to an object. Such cameras work in light and dark environments and have high accuracy. One class of such cameras is relatively slow and is used for exact geo-measuring and 3D scanning of big areas. Another class of these cameras, such as Panasonic D-Imager, works in real time and is widely used for interactive applications at indoor and outdoor scenes.
Passive stereo camera: It consists of two or more visible-light cameras, which are a little separated in space and precisely aligned. The cameras...
