In 3D computer graphics and computer vision, a depth map is an image or image channel that contains information relating to the distance of the surfaces of scene objects from a viewpoint. The term is
Cubic Structure
Shallow depth of field effect
The depth of field is the distance between the nearest and the farthest objects that are in acceptably sharp focus in an image captured with a camera. See also the closely related depth of focus.
Depth map
…Simulating the effect of uniformly dense semi-transparent media within a scene - such as fog, smoke or large volumes of water. Simulating shallow depths of field - where some parts of a scene appear to be out of focus. Depth maps can be used to selectively blur an image to varying degrees. A shallow depth of…
A macro photograph showing the defocused effect of a shallow depth of field on a tilted page of text
This photo was taken with an aperture of f/22, creating a mostly in-focus background.
The same scene as above with an aperture of f/1.8. Notice how much blurrier the background appears in this photo.
Aperture = f/1.4. DOF = 0.8 cm