Kdenlive/Підручник/Ефекти/Дії з прозорістю/Операції з прозорістю

    From KDE UserBase Wiki
    Revision as of 14:35, 16 July 2019 by Yurchor (talk | contribs) (Created page with "Це [http://www.mltframework.org/bin/view/MLT/FilterFrei0r-alpha0ps alpha0ps] Frei0r — показ і дії з каналом прозорості.")
    The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
    Other languages:

    Операції з прозорістю

    Це alpha0ps Frei0r — показ і дії з каналом прозорості.

    Use this to shrink, grow, threshold and visualize the alpha channel.

    This plugin can shrink, grow, threshold and invert the alpha channel. It is mainly intended to improve keying edges. It can also display the alpha channel in various ways, to enable quick assessment of the effect.

    It is cascadable, so for example one can do a soft shrink first and then threshold, which gives a slightly different result than a hard shrink.

    Параметри:

    Display:
    what to display. There are seven options: Image, Alpha as gray, Gray+red, Selection on black, Selection on gray, Selection on white and Selection on checkers.

    This is intended for monitoring during adjustment mostly. After adjusting the parameters, it should be left on Image, which lets the unchanged input image through - this plugin is intended to change only the alpha channel...
    Display input alpha:
    use input alpha for the display function above. (Check what alpha we are getting on the input)
    Operation:
    select the operation to be done on the alpha channel. Currently there are six choices: NO OP, Shave, Shrink hard, Shrink soft, Grow hard, Grow soft, Threshold.

    Shave try to remove the "hairy" stuff, and also shrinks the selection a bit.

    The hard operations introduce no new values to the alpha channel, so if you have a "hard" key (only 0 and 255) it will stay that way.

    The soft operations will introduce interpolated values, making the edge softer.

    Note

    The shave, shrink and grow operations are quite slow, because they do many conditional operations on each pixel.


    Threshold:
    This is only used for the Threshold operation.
    Shrink/grow amount:
    How far the shrinking/growing will extend.
    Invert:
    Inverts the input alpha channel, transparent will become opaque and vice versa.
    Display Menu Options
    Operation Menu Options
    Tutorial 1

    Shows usage of alpha operations - Shrink hard as well as the following effects: blue screen, denoiser and keysplillm0pup