- replace hard binary thresholding with smooth
linear alpha mapping to reduce halos around
foreground edges especially in low
resolution images
- normalize now uses a quadratic curve instead
of hard binarization so that gradient info
from the model output is preserved
- removebackgroundasync applies a configurable
linear interpolation between the set min and
max feathering thresholds so you have partial
transparency at the edges
Stevan Freeborn