1/7/2023 0 Comments Chroma key live gl![]() It can be a real chore, and an unsuccessful one at that, to get rid of those “ghosts” in post-production. Color SpillsĬolor spill occurs when your background infringes on your subject, thereby casting that background color, particularly around the edges like the back of the shoulders, side of the arms or legs, and through the hair. If you are going to venture into this territory, make sure you use enough black gobos to create a “shadow” instead of a highlight. ![]() Remember: contrast is everything! The exact opposite can be said of photographing blond hair against a white background. A second consideration is hair lighting: with a dark background and a subject with dark hair, it is vital that you use extra backlighting on your subject’s head and shoulders to offer some clear separation between subject and background. Using a dark gray or black background is going to require the same amount of forethought as you would when using a green background: attention to clothing and lighting is imperative. ![]() What is most important, as mentioned earlier, is contrast: the difference between subject and background. So, with that in mind, let’s talk about using black backgrounds and white backgrounds, and even mid- to dark-gray seamless paper as a means of simulating the same effect you can get with green and blue. One of the most important aspects of working with chromakey in still photography is the use of materials that are polar opposites: green and red, blue and yellow. Black, gray, and even white seamless backdrops are a popular green screen alternatives for digital still photography. Photo Courtesy of Ryan Walsh, Featuring: Gray Collapsible Backdrop Do you absolutely need to use a green screen?Ībsolutely not! If you don’t have a chromakey setup, no green screen, or blue one for that matter, there are ways of working with what you already have. If you shoot incorrectly, then you potentially have some very green looking clients, not to mention how long it will take in post-production to correct the glaring errors. If everything is shot right, digital masking is easy. You want to understand what the chromakey software is looking for and set up your photo shoot for that purpose. A well kept ‘secret’ about chromakey is that its success has as much to do with the photography as it does the software. So, the idea is to “film” your subject on a background completely contrary in color to the background so that when you get around to editing the image in your computer, you can easily separate the two. Human skin tones contain no blue or green, preventing any background interference.Digital sensors, unlike film, are highly sensitive to the color green.Most, if not all movies using this technology, are using green screens today. Nearly seventy-five years later that has changed. The technique originated in Hollywood back in the 1940s and started out originally utilizing blue screens because blue is the furthest color in the visual spectrum from red, which is the main color in human skin tones. ‘Chromakey’ is the process of shooting against a blue or green screen, removing that screen color with special software, and adding in a different background.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |