Originally Posted by riverhawk79
Thanks I'll start reading!
I'm still curious on luma vs chroma though. I guess I just don't understand when each of them comes into play, and why a different algorithm would be better for one and not the other.
Start simple. Softcubic on MadVR produces a pleasing image and there
is a sharpness knob you can play with. After that substitute the chroma
scaling and see what you like.
Catmull-Rom, Mitchell-Netravali and Spline is one group and
Lanczos is the other with cubic in the middle.
The Chronicles of Riddick is a good movie to experiment with the effects
of the various algorithms that MadVR provides.
Luminance and Chrominance are vastly different creatures. The former
is the reference intensity of one of the primary color signals and chrominance
is a pair of values containing the relative intensities of the other
2 primary colors, the color difference signal.
In simple terms the Luma channel needs a good 1D reconstruction filter and
chroma needs one that works well in 2D. Mitchell-Netravali and
its derivitive Catmull-Rom was originally designed as a 2D image reconstruction filters
If you are interested in how the information is encoded in video look
at the link below.http://en.wikipedia.org/wiki/YUV