Fundamentals of Wearable Computers and Augmented Reality, 2nd Edition

467Visual Consistency in Augmented Reality Compositing

The noise textures are used in an adapted AR rendering pipeline. When render-

ing virtual objects over the background camera image, the color values of their

pixels are modied based on the noise textures. Between frames, the noise textures

are translated and rotated randomly so that dynamically varying noise is emulated.

In order to better match the characteristics of image noise found in the camera

image, the scaling of the noise textures, the magnitude of the noise modulation,

and the speed of the random noise animation are adjustable with user-denable

parameters.

Figure 18.3 shows an example ...