The ability of a 3D picture to perceive depth is greatly appreciated by the people who use them in their daily lives. 3D pictures or stereo photo scanners are available in many shapes, sizes and price ranges. The latest versions of these products offer superb depth perception with a great realistic feeling in every picture you see. In reality, depth perception is a major factor that helps us enjoy the wonderful world of photography and watching 3d pictures in real life. Most digital cameras have the facility of 3D pictures that make these devices even more appealing to the people who use them

3D picture scanners or stereo photo scanners work on the basic principle of detecting the differences in two images by the differences in the light reflected from the subject. The scanner works on detecting the differences between the depth perception of a light beam directed at the subject and the normal path of light that the camera can observe. If you use a normal point-and-shoot camera to take a picture, you will have to be extremely careful about the exact positioning of your camera in order to get a clear picture. You also need to use the right filter for the right scene in order to eliminate all possible backgrounds. For example, if you are taking a picture of a snow-covered mountain top, you will not want to position your camera so that you are facing the slope; you will want to tilt the camera downward so as to capture a better view of the snow covering the surface of the hill.

3D picture systems are available in many types such as digital LED, 3d optical, and stereo optical systems. In the digital display units, the three main articles that are used in scanning include the display lens, scanner, and the video camera. The main articles operate on a common principle namely, the reflection and refraction of light. This principle enables the scanner to detect the difference in the positions of the main articles when they are scanned

Depending on the kind of scanner you have purchased, there is a different viewing method available for it. The viewing method basically allows one unit to function as an all-in-one unit or as separate units for viewing, scanning, and playing. The detached viewing method basically means that the first unit is connected to the computer via a USB cable and the other unit can be connected directly to the LCD screen. Some digital display systems are compatible with computers that have a USB port. If this is the case, then the connection between the computer and the display is made through the USB port.

In stereo photography, the viewing method of the unit is different in that it uses two independent images produced by the two cameras for each eye. The information from the two cameras are fed into the computer program that operates in real time and the stereo photographs are then displayed on the monitor. Although there is a limitation when it comes to the quality of the stereo photographs, they are ideal for those who are interested in viewing and reviewing the pictures without having to wait for them to be printed

Many stereo display systems also use special glasses that enable them to work well even if the distance is very far. In addition to the glasses, the stereo images also benefit from a depth perception feature. The depth perception feature is present in many common 3D televisions as well as the most expensive ones. The depth perception feature enables viewers to see the depth of objects just as they would when they look at them using their eyes using normal glasses. This feature makes 3D picture watching even more enjoyable.