Kdenlive/Manual/Effects/Alpha manipulation/ru: Difference between revisions

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Обработка альфа-канала

Общая информация по работе с альфа-каналом

Обработка альфа-канала, более известная, как технология Хромакей, — это эффект заменяющий фон изображения на фон который может потребоваться пользователю.

Более подробно о самих эффектах можно узнать на страницах:

Хромакей: базовый (эффект для простого хромакея)
Хромакей:расширенный (выбор цвета) (эффект для сложного хромакея)

Эффекты в категории Обработка альфа-канала

Справочные материалы по композитингу

Полезные статьи в Wikipedia Альфа-канал, Хромакей. См. также Porter, Thomas; Tom Duff (1984). "Compositing Digital Images". Computer Graphics 18 (3): p253–259 1984 pdf

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 <languages/>
-== Эффекты - Обработка альфа-канала ==
+=== Обработка альфа-канала ===
-=== General Information about Alpha Manipulation  ===
+=== Общая информация по работе с альфа-каналом  ===
-As far as I am aware Alpha Manipulation effects are always used in combination with a [[Special:myLanguage/Kdenlive/Manual/Transitions/Composite|composite transition]]. This because Alpha Manipulation is to do with manipulating the so called "alpha-channel" of images and videos. The Alpha channel is data that describes how two images are to be combined (or composited) into one. So you need a composite transition on the timeline to tell '''Kdenlive''' that you are compositing the videos from two different tracks into one image.
+Обработка альфа-канала, более известная, как технология Хромакей, — это эффект заменяющий фон изображения на фон который может потребоваться пользователю.
-{|
+Более подробно о самих эффектах можно узнать на страницах:
-|[[File:Two tracks no transition.png|left]]||This image shows two video tracks with no transition.<br />The project monitor shows how the upper track takes precedence when no transition is in play.
-|}
-{|
+# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Blue Screen|Хромакей: базовый]] (эффект для простого хромакея)
-|[[File:Two tracks composite transition no alpha info.png|400px|left]]||This image shows two video tracks with a composite transition in place but with no Alpha information to tell '''Kdenlive''' how to combine the images.<br />With composite transition but no alpha info to describe how to composite the picture the top track still takes precedence.
+# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Color Selection|Хромакей:расширенный (выбор цвета) ]] (эффект для сложного хромакея)
-|}
-{|
-|[[File:Two tracks composite transition with alpha info.png|400px|left]]||This image shows the situation with Alpha info now added via the blue screen method.<br />The blue screen effect is also known as "Color to alpha" [http://www.mltframework.org/bin/view/MLT/FilterFrei0r-bluescreen0r] and all the blue screen effect does is say that where the video is blue the alpha value is 0 (i.e. transparent).<br />So now that we have alpha information the second tracks image now shows through where the alpha channel says the image should be transparent.
-|}
-Once you have some alpha channel data in play you can alter the settings in your [[Special:myLanguage/Kdenlive/Manual/Transitions/Composite|composite transition]] to change how the images will combine. See [[Special:myLanguage/Kdenlive/Manual/Transitions/Composite|composite transition]] page for details.
-You can also combine two video tracks together using the [[Special:myLanguage/Kdenlive/Manual/Transitions/screen|screen]] transition (if one of them is filmed on a black background).
-=== Hint for previewing the alpha manipulation effects ===
+==== Эффекты в категории Обработка альфа-канала ====
+# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Alpha gradient|Градиент альфа]]
+# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Alpha operations|Операции с альфа]]
+# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Alpha shapes|Фигуры в альфа]]
+# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Blue Screen|Хромакей: базовый]]
+# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Color Selection|Хромакей: расширенный (выбор цвета)]]
+# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Mask0Mate|Прямоугольная альфа-маска]]
+# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Rotoscoping|Ротоскопирование]]
+# [[Special:myLanguage/Kdenlive/Manual/Effects/Misc/keysplillm0pup|Подавление рассеивания цвета]]
-The preview in Project monitor goes all strange when you select the composite transition in the time line or the video 1 in the time line.
+==== Справочные материалы по композитингу  ====
-[[File:Weird preview look.png|400px|left]]
+Полезные статьи в Wikipedia [http://ru.wikipedia.org/wiki/Альфа-канал Альфа-канал], [https://ru.wikipedia.org/wiki/Хромакей Хромакей]. См. также Porter, Thomas; Tom Duff (1984). "Compositing Digital Images". Computer Graphics 18 (3): p253–259 1984 [http://keithp.com/~keithp/porterduff/p253-porter.pdf pdf]
-What the project monitor looks like when you have just selected the composite transition in the time line. This is not what the rendered video will look like.
-To get a look at what the video will render as you need to click Video 1 and then Video 2 in the timeline.
-<br style="clear: both;"/>
-[[File:Two tracks composite transition with alpha info.png|400px|left]] What the preview looks like once you select Video 2 in the timeline. This is what the rendered file will look like
-<br style="clear: both;"/>
-<br />
-=== Effects in the Alpha Manipulation Category ===
-# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Alpha gradient|Alpha gradient]]
-# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Alpha operations|Alpha operations]]
-# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Alpha shapes|Alpha shapes]]
-# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Blue Screen|Blue Screen]]
-# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Color Selection|Color Selection]]
-# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Mask0Mate|Mask0Mate]]
-# [[Special:myLanguage/Kdenlive/Manual/Effects/Alpha manipulation/Rotoscoping|Rotoscoping]]
-=== Compositing Reference Material ===
-For some background the Wikipedia article in [http://en.wikipedia.org/wiki/Alpha_compositing alpha compositing] is usefull. See also Porter, Thomas; Tom Duff (1984). "Compositing Digital Images". Computer Graphics 18 (3): p253–259 1984 [http://keithp.com/~keithp/porterduff/p253-porter.pdf pdf]
 {{Prevnext2
-| prevpage=Special:MyLanguage/Kdenlive/Manual/Effects| nextpage=Special:MyLanguage/Kdenlive/Manual/Effects/Audio
+| prevpage = Special:myLanguage/Kdenlive/Manual/Effects
-| prevtext=Effects | nexttext=Audio
+| nextpage=Special:MyLanguage/Kdenlive/Manual/Effects/Analysis_and_Data
-| index=Special:MyLanguage/Kdenlive/Manual | indextext=Back to menu
+| prevtext=Эффекты
+| nexttext=Анализ и данные
+| index=Special:MyLanguage/Kdenlive/Manual/Effects#Effects_Categories| indextext=Категории эффектов
 }}
 [[Category:Kdenlive]]