You are viewing an archive of the old fxhome.com forums. The community has since moved to hitfilm.com.

Auto-Masking foreground

Posted: Sun, 27th Jun 2010, 10:51am

Post 1 of 4

Carty

Force: 0 | Joined: 27th Jun 2010 | Posts: 4

MacOS User

Member

Is there a facility where the complete foreground can be auto masked to retain "Alpha" thus preventing the need to manually link around the complete object?

My particular reason for this is the production of many images of the same subject with slight streaks of green which I wish to retain on all images.

If not what are the possibilities for future inclusion.

Many Thanks
Posted: Sun, 27th Jun 2010, 3:58pm

Post 2 of 4

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

VisionLab User VideoWrap User PhotoKey 5 Pro User MuzzlePlug User PowerPlug User PhotoKey 3 Plug-in User FXhome Movie Maker FXpreset Maker MacOS User

SuperUser

I don't fully understand the question, sorry.

You want to mask the entire foreground and retain alpha, you mean not key out the greenscreen at all? You can certainly do this, by turning off the Key tool, but I don't see the purpose of running the images through PhotoKey if that's what you mean.

If you mean you want to automatically create a mask the shape of your foreground after keying, this isn't possible as such, as the software has no way of knowing what should be masked without you telling it. If the motive is that the subject contains green, the software can't know what green you would like to mask, and what green shouldn't be masked. However, if you draw the mask once in PhotoKey Pro, it will be applied to all the photos you import into the project.

Alternately, the standard method to deal with a subject containing green lines is to use a blue screen, which eliminates the need for masking.
Posted: Mon, 28th Jun 2010, 12:14am

Post 3 of 4

Carty

Force: 0 | Joined: 27th Jun 2010 | Posts: 4

MacOS User

Member

Many thanks for your reply.

Your second para applies EG I photograph Racing Pigeons in a mini studio and after keying I am left with the Bird, however there are some minor green areas in the feathers which I wish to retain wherever they are so my thinking was to mask the complete outline of the bird to retain all these natural green areas within the masked outline.

I feel that it may not be difficult to build a command to mask the remaining complete outline of the foreground after keying.

I can't use blue as this is the major colour of the birds.

Hope I am making sense!!!

Many Thanks
Posted: Mon, 28th Jun 2010, 6:17am

Post 4 of 4

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

VisionLab User VideoWrap User PhotoKey 5 Pro User MuzzlePlug User PowerPlug User PhotoKey 3 Plug-in User FXhome Movie Maker FXpreset Maker MacOS User

SuperUser

Yeah, you make sense. I don't know of a way the program could determine what areas of green should be retained by a mask and what ares of green shouldn't, without some interaction on the part of the user, but maybe its possible.