Should I choose a Green, Blue, Digi or Chroma Screen?

- When deciding on Green or Blue, there are general considerations, and also considerations specific to your subject matter

- It's likely you'll be shooting digitally: Digital photography is most sensitive in the green channel, which happens also the cleanest and least noisy

- In selecting beween blue or green, the goal should be to create as much contrast in the channel of the color you have selected, while keeping noise to a minimum.

- Green is good for low noise, but if the object is yellow, the contrast in the green channel will be low. Essentially, work to reduce the likelihood anything appearing in front of the screen is a similar color to the screens' color.

- Dark objects on a bluescreen will give poor results, as the cleaner red and green channels will not be of use for keying

- Blue spill is easier to remove than green, as it tends to remove the noise rather than the cleaner pixels

- Now that you've chosen between blue and green, we move into various options from there: Chromakey or Digital are different variations of each color

- Choosing Chromokey or Digital usually comes down to cost, and how complicated the compositing is expected to be. Digi is subsanially more expensive

- Chromakey was designed for optical compositing where the entire band of color was removed from the image and replaced. In low complexity keying and compositing, Chromakey is still more than acceptable

- Digital was created at the onset of digital compositing and creates a more refined color, where a very specific range of hue and value can be isloated.

- Digital screens should be used with high frame rates, fast motion, and highly detailed edges.

- With equal lighting, digital can easily be lifted several stops brighter than chroma due to more reflectance, therefore caution must be taken not to overlight.

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