Keying: Difference between revisions

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[[Category:Techniques]]

~~Too lazy~~ to ~~[[Mask]] everything out? keyin' got your back lol~~

'''Keying''' is the process of taking a certain aspect of a video and "keying it out" (removing) it from the footage. Usually this is done to create transparent segments of the video of which other layers can be placed underneath.

=~~Keying~~ Types=

The most common usage of this is the "green screen", where the color green (or blue) will be made transparent. This is commonly done in movies by having a green room the actors will work in; then the background is edited in. Just like in movies, this idea is applied to [[Tennis]] to either remove aspects of a video, or (when working with editors that cannot support alpha channels) key out backgrounds for [[puzzle pieces]] to be used properly.

=Usage=

All types of keying follow the same general idea:

* Choose the color that you want to key.

* Set the "smoothness" (how rough the keyed-out area is) and the "tolerance" (if similar colors should be keyed out as well).

* The keyed out area should be now transparent. Now, if you place this footage on top of another piece of footage, the bottom layer will appear underneath!

=Types of Keys=

==Chroma Key==

~~Most commonly~~ used ~~by professional editors~~.

A '''chroma key''' (more often spelled as '''chromakey''') is keying the image based on the chroma of the image. This is most famously used in movies and TV shows, for "blue/green screen" effects.

<youtube>https://www.youtube.com/watch?v=CKiOFyXfkts</youtube>

==Color Key==

While ''very'' similar to a chromakey a '''color key''' keys based on the ''color'' rather than the chroma. This is more common for computer graphics rather than movies/film.

==Luma Key==

Just like all the others, the '''luma key''' keys based on the luma of the image.

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 [[Category:Techniques]]
-{{Stub}}
+{{WIP}}
-Too lazy to [[Mask]] everything out? keyin' got your back lol
+'''Keying''' is the process of taking a certain aspect of a video and "keying it out" (removing) it from the footage. Usually this is done to create transparent segments of the video of which other layers can be placed underneath.
-=Keying Types=
+The most common usage of this is the "green screen", where the color green (or blue) will be made transparent. This is commonly done in movies by having a green room the actors will work in; then the background is edited in. Just like in movies, this idea is applied to [[Tennis]] to either remove aspects of a video, or (when working with editors that cannot support alpha channels) key out backgrounds for [[puzzle pieces]] to be used properly.
+=Usage=
+All types of keying follow the same general idea:
+* Choose the color that you want to key.
+* Set the "smoothness" (how rough the keyed-out area is) and the "tolerance" (if similar colors should be keyed out as well).
+* The keyed out area should be now transparent. Now, if you place this footage on top of another piece of footage, the bottom layer will appear underneath!
+=Types of Keys=
 ==Chroma Key==
-Most commonly used by professional editors.
+A '''chroma key''' (more often spelled as '''chromakey''') is keying the image based on the chroma of the image. This is most famously used in movies and TV shows, for "blue/green screen" effects.
+<youtube>https://www.youtube.com/watch?v=CKiOFyXfkts</youtube>
 ==Color Key==
+While ''very'' similar to a chromakey a '''color key''' keys based on the ''color'' rather than the chroma. This is more common for computer graphics rather than movies/film.
 ==Luma Key==
+Just like all the others, the '''luma key''' keys based on the luma of the image.