Maybe this info is of interest for David
*** List of filters in the G'MIC plug-in for GIMP (675 filters, on 2015/10/1 14:00) ***
* List of filters, sorted alphabetically:
前景切り出し [インタラクティブ] (in '/Contours/')
彩色 [インタラクティブ] (in '/Black & white/')
彩色 [コミック] (in '/Black & white/')
* List of filters, sorted by path:
Black & white / 彩色 [インタラクティブ] (command '-gimp_colorize_interactive')
Black & white / 彩色 [コミック]
Contours / 前景切り出し [インタラクティブ] (command '-gimp_extract_foreground')