Jump to content


Photo

Red marks in green screens


  • Please log in to reply
6 replies to this topic

#1 David Edward Keen

David Edward Keen
  • Basic Members
  • PipPipPip
  • 151 posts
  • Student
  • New York City

Posted 02 December 2015 - 08:33 AM

Hello wizards,

I wonder what are these marks? Little x's. What is their function?
  • 0


#2 Phil Rhodes

Phil Rhodes
  • Sustaining Members
  • 11877 posts
  • Other

Posted 02 December 2015 - 08:56 AM

Tracking. 

 

In postproduction, the computer can recognise and track the location of the red crosses to ensure that the background stays in the right place as the camera moves.

 

With most modern software, any reasonably high-contrast target can be used for tracking. Putting coloured crosses on the green is just one way of doing it. Sometimes, a different shade of green (or blue) is used because it's then easier to key out the tracking markers.

 

P


  • 0

#3 David Edward Keen

David Edward Keen
  • Basic Members
  • PipPipPip
  • 151 posts
  • Student
  • New York City

Posted 02 December 2015 - 11:28 AM

Ah to create the relative movement between camera and objects you'd expect to see in reality?

Great piece on Dick Pope BSC, btw. Just realized you must be that Phil Rhodes.
  • 0

#4 Adrian Sierkowski

Adrian Sierkowski
  • Sustaining Members
  • 7075 posts
  • Cinematographer
  • Los Angeles, Ca

Posted 02 December 2015 - 01:15 PM

"that phil rhodes" should be on all his cards-- says me.


  • 0

#5 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 19640 posts
  • Cinematographer
  • Los Angeles

Posted 02 December 2015 - 05:14 PM

And maybe the other Phil Rhodes in the U.K. are carrying cards that say "Not That Phil Rhodes"... ;-)
  • 0

#6 David Edward Keen

David Edward Keen
  • Basic Members
  • PipPipPip
  • 151 posts
  • Student
  • New York City

Posted 03 December 2015 - 02:29 PM

whoops a daisy

 

well it was good advice, much appreciated


  • 0

#7 Robin R Probyn

Robin R Probyn
  • Basic Members
  • PipPipPipPip
  • 1737 posts
  • Cinematographer
  • Tokyo

Posted 03 December 2015 - 04:08 PM

All Rhodes lead to Phil.. 


  • 1


Glidecam

The Slider

Wooden Camera

CineTape

Broadcast Solutions Inc

Visual Products

rebotnix Technologies

Media Blackout - Custom Cables and AKS

Ritter Battery

Gamma Ray Digital Inc

FJS International, LLC

Willys Widgets

Aerial Filmworks

Metropolis Post

Paralinx LLC

Abel Cine

Tai Audio

Technodolly

Rig Wheels Passport

CineLab

Technodolly

Media Blackout - Custom Cables and AKS

Gamma Ray Digital Inc

The Slider

Rig Wheels Passport

Paralinx LLC

Aerial Filmworks

CineLab

Broadcast Solutions Inc

Visual Products

FJS International, LLC

Metropolis Post

CineTape

Willys Widgets

Ritter Battery

Glidecam

Tai Audio

Wooden Camera

Abel Cine

rebotnix Technologies