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

problems getting a clean edge

Posted: Thu, 20th Nov 2008, 1:01pm

Post 1 of 11

vinnie

Force: 410 | Joined: 20th Aug 2008 | Posts: 12

PhotoKey 2 Pro User

Gold Member

I'm having problems getting a clean edge on photos, and removing the greenscreen. I can get one or the other. These images show the results using different settings, I've composited the image with a white background, as this shows the results best.

example files

original file http://www.macphoto.net/photokey/1108-bme-0014.jpg Subject was about 4 to 5 feet from the background, which was lit to one f stop below subject to prevent green light bouncing onto subject.

with different settings

http://www.macphoto.net/photokey/1108-bme-0014-44d16l17t.jpg (44 detail 16 level 17 threshold) This gives me good extraction of the background, but a halo around the subject

http://www.macphoto.net/photokey/1108-bme-0014-29d63l41t.jpg (29 detail, 63 level, 41 threshold) This gives me poor extraction of the background, but a clean edge.

I've tried playing around with spill suppression, but it doesn't help. Setting colour to automatic or green doesn't make any difference.

Any suggestions on how to get a better extraction?
Posted: Thu, 20th Nov 2008, 1:31pm

Post 2 of 11

vinnie

Force: 410 | Joined: 20th Aug 2008 | Posts: 12

PhotoKey 2 Pro User

Gold Member

I found the answer - Light spill in the Combine tab was set to 25%
Posted: Fri, 21st Nov 2008, 11:35pm

Post 3 of 11

FXhomer61310

Force: 0 | Joined: 21st Nov 2008 | Posts: 1

Member

Vinnie,

Can you please elaborate on how you fix the problem? What settings you ended up using? and can you post your final result?

Thanks,

Val
Posted: Mon, 24th Nov 2008, 8:08pm

Post 4 of 11

vinnie

Force: 410 | Joined: 20th Aug 2008 | Posts: 12

PhotoKey 2 Pro User

Gold Member

Finished photo is here http://www.macphoto.net/misc/1108-bme-0014.jpg

Setting the Light Spill in the Combine tab to 10 helped eliminate the problem
Posted: Wed, 14th Jan 2009, 1:33am

Post 5 of 11

Elijah

Force: 1000 | Joined: 8th Jun 2008 | Posts: 42

CompositeLab Pro User PhotoKey 4 User

Gold Member

vinnie wrote:

I found the answer - Light spill in the Combine tab was set to 25%
Yeah, explain to me why the light spill "defaults" to "25 pixels"? I wasted a 45 minutes trying to figure out why my image had a halo effect.
Posted: Wed, 14th Jan 2009, 2:15am

Post 6 of 11

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

It has to default somewhere, and the right location for it is going to vary on virtually every composite, as it is affected by both the image size and the background being used. I'm guessing they put it at 25 figuring that keeping it on the low end would get you close more often than having it huge would.
Posted: Thu, 15th Jan 2009, 5:00am

Post 7 of 11

TubeTape

Force: 9542 | Joined: 24th May 2007 | Posts: 169

VisionLab User VideoWrap User PhotoKey 5 Pro User PhotoKey 3 Plug-in User FXpreset Maker Windows User MacOS User

Gold Member

Thanks for all the feedback on this thread. The examples were great and we've passed this info on to many of our customers.

The forums here at FXhome are really a great way for the whole community to help one another.

Posting sample pics like the one in the thread really allow others to gain insight.

Thanks
Posted: Mon, 16th Feb 2009, 2:50pm

Post 8 of 11

xtremed

Force: 2250 | Joined: 10th Sep 2008 | Posts: 109

PhotoKey 5 Pro User Windows User

Gold Member

@ tubetape (i suppose you are Amanda? wink )

If you need more samples for the tupetabe store please send me a e-mail. As your support has always been perfect it would be no problem to help you.

I currently have a large database of al kind of pictures taken at business- and musicevent with different backgrounds.
Posted: Mon, 16th Feb 2009, 5:22pm

Post 9 of 11

TubeTape

Force: 9542 | Joined: 24th May 2007 | Posts: 169

VisionLab User VideoWrap User PhotoKey 5 Pro User PhotoKey 3 Plug-in User FXpreset Maker Windows User MacOS User

Gold Member

Thanks for the offer. We sent you a message with instructions where to send them. This is Amanda but sometimes other TubeTapers answer questions on the forum as well smile
Posted: Wed, 11th Mar 2009, 2:34am

Post 10 of 11

HJB Productions

Force: 750 | Joined: 20th Mar 2008 | Posts: 5

PhotoKey 3 User

Gold Member

vinnie wrote:

I found the answer - Light spill in the Combine tab was set to 25%
Where do you find the "Combine Tab" on photokey2?
Posted: Wed, 11th Mar 2009, 2:41am

Post 11 of 11

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

In Photokey 2, the Light Spill can be found in the "Effects" toolset. There is no longer a "Combine" tab.