Hello,
I forgot to mention that SubtractImage demo is also mentioned on this help page: https://www.imageen.com/help/TIEVisionBackgroundSubtractor.html.
And I am trying out the code on this page. The exact fragment is:
// "Learn" background
SubtractorObject.Apply( BackgroundImage.GetIEVisionImage(), 1 );
// Pass subject and get foreground mask
fgmask := SubtractorObject.Apply( ForegroundImage.GetIEVisionImage(), 0 );
TIA
Yogi Yang