Dive deep in chroma keying
Chroma key compositing, or chroma keying, is a visual
effects/post-production technique for compositing (layering)
two images or video streams together based on color hues (chroma range).
The technique has been used heavily in many fields to remove
a background from the subject of a photo or video – particularly
the newscasting, motion picture, and video game industries.
A color range in the foreground footage is made transparent, allowing
separately filmed background footage or a static image to be inserted
into the scene. The chroma keying technique is commonly used in video
production and post-production. This technique is also referred to
as color keying, colour-separation overlay or by various terms for
specific color-related variants such as green screen, and blue screen –
chroma keying can be done with backgrounds of any color that are uniform
and distinct, but green and blue backgrounds are more commonly used
because they differ most distinctly from most human skin colors. No part
of the subject being filmed or photographed may duplicate the color
used as the backing.
It is commonly used for weather forecast broadcasts, wherein a news presenter is usually seen standing in front of a large map during live television newscasts, though in actuality it is a large blue or green background. When using a blue screen, different weather maps are added on the parts of the image where the color is blue. If the news presenter wears blue clothes, his or her clothes will also be replaced with the background video. Chroma keying is also common in the entertainment industry for visual effects in movies and video games.
Check out this video of chroma keying. Easter egg at the end. Feel free to leave a comment below.
(source:https://www.projection-screen-supplier.com/dive-deep-in-chroma-keying/)
It is commonly used for weather forecast broadcasts, wherein a news presenter is usually seen standing in front of a large map during live television newscasts, though in actuality it is a large blue or green background. When using a blue screen, different weather maps are added on the parts of the image where the color is blue. If the news presenter wears blue clothes, his or her clothes will also be replaced with the background video. Chroma keying is also common in the entertainment industry for visual effects in movies and video games.
Check out this video of chroma keying. Easter egg at the end. Feel free to leave a comment below.
(source:https://www.projection-screen-supplier.com/dive-deep-in-chroma-keying/)
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