Chroma Keying
Chroma key composting (or chroma keying) is a technique for composting two images or frames together in which a color (or a small color range) from one image is removed (made transparent), revealing another image behind it. This technique is also referred to as color keying, color-separation overlay green screen, and blue screen.
If you are a photographer then you may looking for Green Screen Software, Green Screen Kit or Chroma Key Green Backdrops.
As for above definition clear why are how you can use chroma key in Photography. For green screen replacement you must need Green Screen Software. Variety of green screen products specially software, lighting, backdrops are available are on the internet. But you have to choose better quality green screen software
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