Due to efficient pre-visualization, the team was able to show its actors or technicians how the end product will look like and this enabled a smooth workflow. The success of the film owes much to the pre-visualization that director Ang Lee decided to attain. For shots that had only the tiger in the frame, they used a real tiger and that set the standards high for CGI. Richard Parker, the ferocious tiger was mostly a blue puppet on set! The visual effect supervisor of the film said that almost 86% of Richard Parker scenes were digitally created. One of the best examples of the use of the blue screen is the Ang Lee-directed Life of Pi which released in 2012. The other feature of blue screen is that it requires twice as much light as a green screen and this makes it difficult to film lengthier scenes. The flip side of this is that the camera samples green more than blue and hence during the keying process, several adjustments have to be made to get a smooth natural key. Because of this feature, color correction becomes a much easier process with blue screens. Because of its low brightness, the chances for the color to reflect back of the screen is minimal too. Blue screens are darker and hence they are best used for low light situations such as night scenes. The same reason as in why we don’t use red screens, if your objects or costumes fall in the same color range of the screen, the shadows or reflections of the screen will intercede your image. For example, it wouldn’t be too smart to use the blue screen for a movie like Avatar or a green screen for Kermit the Frog. The primary factor concerning the use of the blue or green screen is the color of subjects and costumes in the foreground. This footage is then interlaced above a different background and the resulting image is that this new background will appear on the deleted parts of the image. What happens during chroma keying is that, a desired color and brightness range is set and this part of the image is subtracted from the video frame. The skin tone of human beings contain a lot of red and hence if red screens are used, the shadows of the background screen will be interposed on to the image. So, most digital interfaces make use of Red, Blue and Green colors to create the image. They are emitting elements, meaning, the more you add, the brighter it gets. The Red, Green and Blue colors are a combination of additive colors. Televisions, Computers, Digital Cameras, Video Cameras and all make use of it. You might have heard of the Red Green Blue (RGB) Model. But why this love for blue and green? Why are no other colors considered? Well… It is no personal grudge from filmmakers nor are they superstitious. Once the color is removed, the background location or canvas can also be changed. It is the technique of filming live action on a firm color background and then digitally removing it during post-production. That wonderland which just amazed you was just a plain blue or a green screen set! Scintillating, isn’t it? So what is this blue and green screens? Why are they used?Ĭhroma Keying is the idea behind this process of using blue and green screens. There you see our hero standing in front of just a plain blue or green screen which is then transferred to the futuristic world on the end product. So you open up your browser and search for before and after visual effects footage of the film. You are determined to know more about behind the scenes and you just cannot sleep without knowing how they did it. You just watched a spellbinding movie filled with visual effects. The Cinematography of effect shots – Blue and Green Screens
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |