- Post
- #747473
- Topic
- Idea & Info: Detail Preserving Upscale GOUT
- Link
- https://originaltrilogy.com/post/id/747473/action/topic#747473
- Time
AntcuFaalb said:
CatBus said:
I'm not sure he got what he was aiming for with the scanlines.
The scanlines weren't explicitly put in. His script actually emulates how an aperture grille CRT (and other CRTs) functions and the scanlines in this case are a side-effect of that.
That's not really accurate, at least it doesn't look that way to me. On a CRT you only really see scanlines in progressive mode (e.g. old video games, arcade machines, computer monitors). In interlaced mode the scanlines are offset by the following field, but the scanline itself is significantly thicker than it is for the empty space between the scanlines. Here, I'll make a picture...
Simple example (no RGB offset):
Top field:
Bottom field:
Combined:
And this is what happens when all you do is upscale (spline36resize) and then "add" scanlines (really you're adding the "black" between the scanlines):
The difference of course being that spline36resize would keep the film at its original speed-rate, whereas the combination of fields would produce a double-rate file (50 or 59.97 fps) since each field is visible for two frames. You could certainly design such a script that leaves you no visible darkened lines and retains the correct brightness of the image; which is more akin to how it looks on a CRT.
Anyway, yeah you could do that, leave yourself a more solid looking picture, and then apply the RGB offset, but it still won't really look the same as viewing a CRT - better to buy yourself a cheap CRT tellie and watch it direct!