Reflection on Green Screen

In the last session of creative futures in video, we were introduced to the importance of green screen and how to employ it for our own work. This process of how to use green screen was very simple for me as I have used this when creating projects/ videos for the last course I did. However, this lesson was a really good recap to refresh my memory. lighting is really crucial when using green screen, the subject has to be really when lit. when doing this task there are multiple ways of doing this.

  1. Use a green backdrop and make sure that the subject is well lite by lights and for the background to have light.

Or

2. The way we did it in the last session where we used a white screen and two lights that had green filters over the top this made the backdrop appear a green colour. In the room it was really dark which meant that there had to be other lights to make the subject well lit, making there face show up really well. For instance, Set up two lights, one from each side, and both a good distance from the screen. This will avoid getting a bright ‘hot’ spot in the center of the lit area. Ideally there should be one key light and two soft There could be more. After the lights were all set up there wasn’t any shadows and the subject was lit fairly evenly, this allowed us to capture the subject clearly.

Once all footage was collected, it was time to place it into Premiere Pro to change the background into something much more. This was a step by step process in which the group followed:

  • Drag the footage onto the timeline
  • Go to the effects panel
  • Drag the eight-point garbage matte onto the footage
  • Go into the effect controls
  • Move about the volumes, to move and cut the background
  • In the effects bar, search for ultra key and drag it onto the footage
  • In effect controls, change the key colour, use the picker tool and hover over the green background
  • Go to output, alpha channel, pull all the whites and blacks
  • Drop the matte generation in the effects control and change the value of the pedestal
  • To view the difference made change back the output back to composite
  • Go to matte cleanup changing the choke and soften settings, trying to get rid of the green
  • Go into spill suppression and change the desaturate, range and luma effects
  • Go onto the internet and find a large image and save it
  • Drag the image onto a new video layer
  • Drag the image to the layer making sure its behind/underneath footage and

Finally Make sure image is same length as video

This was the finished project after following the steps (me and Danielle worked as a team as i was slightly late to the session as my taxi was late)

Before

After

green screen

This technique and tool will be really useful when creating my own footage (like PTC’s) this will allow me the opportunities to add in footage in the background and add in any other things that maybe of importance.

 

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