When you're filming, there are moments when you want your actors to be in a different location than they are. Using chroma keying, you may combine two frames or pictures by changing a color or color range in one frame with another. Simply put, you put an actor in front of a blue screen and use an editing program to replace the blue with a video of them in their preferred location. It's almost unbelievable! When you're shooting a scene, getting the background to look how you want it to might be challenging. That's why they came up with the concept of the blue screen! A blue or green screen is used in movies to replace a scene's background and position the performer in the foreground. Chroma keying is based on the idea that, because blue is the color whose opposite is skin tone, it is possible to distinguish the two. Because of this, it is much simpler to select the color without worrying about any part of the actor being included in the selection. After that, the entire blue piece gets swapped for a different frame to serve as the background. The practice of chroma keying is extensively used since it is more cost-effective than filming in areas that are either prohibitively expensive or difficult to reach. It is also possible to do it in real-time, making it an excellent choice for live entertainment presentations or weather reports. Chroma keying is a technique that involves extracting a color from the backdrop of a photograph and then substituting it with another color or image. This may be accomplished either manually or automatically by employing a green screen, which will cause everything that is behind it to give the appearance of being transparent. This method is commonly used because it makes it easy to construct situations that wouldn't be conceivable in real life. For example, you can create the illusion that you are soaring through space or swimming underwater without having to do such things!