ColorScreenMask is a special effects plugin for processing chroma key (i.e., a green screen or blue screen) backgrounds. It uses color thresholds rather than absolute values as the criteria for setting the alpha channel transparency. I created the plugin because of the difficulties I encountered in using the ColorKeyMask filter under poor lighting conditions.
The intent of this filter plugin is to compensate for halos, shadows, background imperfections such as wrinkles, folds or pits, and other effects of uneven lighting such as not using a tripod when using recording Chroma Key transparency backgrounds that the standard ColorKeyMask filter is unable to handle effectively. The ColorScreenMask plugin complements rather than replaces ColorKeyMask filter (I use both).
You can directly download the ColorScreenMask zip file (includes source, syntax and usage, and dll) using the link
http://GetOddNews.com/projects/ColorScreenMask.zip
For more information on the ColorScreenMask rationale and some test results you can read my web post at
http://getoddnews.com/2011/01/20/colorscreenmask/
NOTE: The ColorScreenMask plugin was tested under the following conditions:
- Computer: HP laptop
- Operating system: VISTA
- avisynth version: 2.58
edit mod: corrected link