mirror of https://github.com/dschmenk/SHR-NTSC.git synced 2024-12-26 17:29:58 +00:00

NTSC artifact colors for Apple IIGS

Go to file

David Schmenk cafcaae557 replace y with l in luv2rgb to make more sense		2020-05-13 07:54:58 -07:00
images	Delete racecars.pdf	2017-07-29 13:55:13 -07:00
Artifact Colors: TNG.pdf	KFest presenttion	2017-07-27 13:00:05 -07:00
imgview.asm	Add remaining files	2017-07-26 13:59:03 -07:00
IMGVIEW.PO	Add remaining files	2017-07-26 13:59:03 -07:00
makefile	Initial check-in	2017-07-20 14:33:07 -07:00
ntsc-140.py	Initial check-in	2017-07-20 14:33:07 -07:00
ntsc-160.py	Initial check-in	2017-07-20 14:33:07 -07:00
ntsc-640-err.py	replace y with l in luv2rgb to make more sense	2020-05-13 07:54:58 -07:00
ntsc-640.py	Initial check-in	2017-07-20 14:33:07 -07:00
README.md	Update README.md	2017-08-28 06:50:58 -07:00
SLIDESHOW.PO	Add slideshow disk image	2017-07-28 13:26:31 -07:00

README.md

SHR-NTSC

NTSC artifact colors for Apple IIGS

First things first: This is far from perfect. I took many liberties in the YUV conversion to improve the possible color matches. There is also quite a bit of chroma-ringing around high contrast areas. But this should be a good start for further explorations.

My 2017 Kansasfest presentation slides are here as a PDF. You can also watch the presentation (prepare to be bored) on YouTube: https://www.youtube.com/watch?v=S8ZsefIEnvE

Or high quality on archive.org: https://archive.org/details/2017_Kfest_NTSC_Artifact_Colors_The_Next_Generation

There is a self-booting 5 1/4 disk image (SLIDESHOW.PO) slideshow of the racecar images (sans 160 pixel version, just wouldn't fit). Press RETURN to advance to next slide. The following images are from the slideshow (including the 160 pixel version).

Original:

Double Hi-Res Graphics:

Super Hi-Res Graphics mapping 140 pixels:

Super Hi-Res Graphics mapping 160 pixels:

Super Hi-Res Graphics mapping 640 pixels:

Super Hi-Res Graphics mapping 640 pixels with error diffusion: