
6. Adaptive Scalable Texture Compression 323
−v <radius><power><baseweight ><avgscale><stdevscale>
<mixing−factor>
The radius is the area of neighboring texels for which the average and standard
deviations in error are combined using the equation
weight =
1
baseweight + avgscale ∗ average
2
+ stdevscale ∗ stdev
2
.
The individual error values are raised to power before average and standard
deviation values are calculated. The mixing factor is used to decide if the indi-
vidual channel errors are combined before or after averaging. If the mixing factor
is 0, each color channel has its own average and standard deviation calculated,
which are then combined in ...