GreenScreen is a easy to use tool that lets you check colours are suitable for pulling Chroma Key matts.
Point your device at at patch of colour you intend to use for a background and GreenScreen will show you how much separation there is between colour channels.
Quick and Simple
Just point your iPhone, iPad or iPod at the surface you intend to pull the matt from, GreenScreen will graph the RGB color channels of the surface for you.
Realtime display
GreenScreen dynamically samples a horizontal line for color half way down the display.
The graph continuously updates as you scan surfaces.
Uses
Use GreenScreen to check if backdrops are evenly lit.
Check paint, paper and fabrics for chromatic suitability before buying them.
GreenScreen works for blue as well.
Controls
Tap pause to see a still image of the scene.
Once paused pinch and scroll the image to see more detail.
Save still images to Camera Roll for later reference.