2008 05 22Lanczos Scaling seems to handle Gamma well
In Gamma error in picture scaling, Éric Brasseur shows the failings of modern image software to handle Gamma while scaling. I've tried it out scaling his sample image in Quartz Composer with a Lanczos Scaling filter, and it seems to look OK :
On the left, OpenGL Scaling. This is meaningless but pretty, so it's included :)
On the right, Lanczos Scaling. The Dalai Lama remains visible even when scaled down to almost nothing.
By comparison, this is how Quartz Composer displays the image, failing to handle Gamma :
- Core Image Alpha Boost
- Lanczos Scaling seems to handle Gamma well
- A 2D Bevel Technique