View source for DeBarrel


{{FilterCat4|External_filters|Plugins|Adjustment_filters|Transformation}}

{{Filter3
|1=<!-- author -->[http://www.avisynth.nl/users/vcmohan/ V.C.Mohan]
|2=<!-- version -->30 Dec 2016
|3= [http://www.avisynth.nl/users/vcmohan/movePlus/movePlus.7z movePlus.7z]
|4= External filters
|5= [https://www.gnu.org/licenses/gpl-3.0.en.html GPLv3]
|6=<!-- discussion URL -->[https://forum.doom9.org/showthread.php?t=136083&highlight=DeBarrel Original DeBarrel plugin], [https://forum.doom9.org/showthread.php?t=174163 movePlus]
}}

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== Description ==
<!-- a one-sentence description -->
Corrects Barrel type or Pin Cushion type distortions in an image that result in due to camera lens projecting image on to a flat film or sensor array. [http://www.avisynth.nl/users/vcmohan/movePlus/Barrel.html Full Description]

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== Requirements ==
* AviSynth+ r2347 or later

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== [[Script variables|Syntax and Parameters]] ==
:{{Template:FuncDef| Barrel (clip, float "a", float "b", float "c", bool "pin", float "vh", bool "test", float "ea", float "eb", float "ec", int "nsteps", Int "frame", Int "color", bool "ind", bool "ypin", float "ya", float "yb", float "yc", float "yea", float "yeb", float "yec")}}
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::{{Par2| |clip| }}
::: Input clip
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::{{Par2|a|float|0.005}}
::: Coefficient a (xa in independent mode and start val in test mode)
::::* Between -0.5 and 0.5
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::{{Par2|b|float|0.005}}
::: Coefficient b (xb in independent mode and start val in test mode)
::::* Between -0.5 and 0.5
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::{{Par2|c|float|0.005}}
::: Coefficient c (xc in independent mode and start val in test mode)
::::* Between -0.5 and 0.5
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::{{Par2|pin|bool|false}}
::: Whether to correct pin cushion or barrel type distortion
::::* true = pin
::::* false = barrel
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::{{Par2|vh|bool|1.0}}
::: Vertical to horizontal distortion ratio
::::* Between 0.1 and 10
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::{{Par2|test|bool|false}}
::: Whether in test mode
::::* true = test
::::* false = normal
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::{{Par2|ea|float|0.05}}
::: End value of coefficient a in test mode (xea in independent mode)
::::* Between -0.5 and 0.5
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::{{Par2|eb|float|0.05}}
::: End value of coefficient b in test mode (xeb in independent mode)
::::* Between -0.5 and 0.5
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::{{Par2|ec|float|0.05}}
::: End value of coefficient c in test mode (xec in independent mode)
::::* Between -0.5 and 0.5
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::{{Par2|nsteps|int|20}}
::: Number of steps for variation (test mode only)
::::* Between 0 and 100
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::{{Par2|frame|Int|0}}
::: Input frame number for over lay (test mode only)
::::* Within input clip
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::{{Par2|color|Int|0}}
::: Color of dots in test mode and left out borders in normal
::::* In RRGGBB format
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::{{Par2|ind|bool|false}}
::: Whether x and y have independent coefficients
::::* true for independent
::::* false for pin cushion or barrel
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::{{Par2|ypin|bool|false}}
::: Whether Y direction has pin cushion distortion?
::::* true for pin cushion
::::* false for barrel
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::{{Par2|ya|float|0.05}}
::: Value of coefficient ya (start value in test mode )
::::* Between -0.5 and 0.5
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::{{Par2|yb|float|0.05}}
::: Value of coefficient yb (start value in test mode)
::::* Between -0.5 and 0.5
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::{{Par2|yc|float|0.05}}
::: Value of coefficient yc (start value in test mode)
::::* Between -0.5 and 0.5
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::{{Par2|yea|float|0.05}}
::: End value of coefficient ya (test mode only)
::::* Between -0.5 and 0.5
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::{{Par2|yeb|float|0.05}}
::: End value of coefficient yb (test mode only)
::::* Between -0.5 and 0.5
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::{{Par2|yec|float|0.05}}
::: End value of coefficient yc (test mode only)
::::* Between -0.5 and 0.5

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== Examples ==
<!-- example code block: 1st char in each line = space -->
 blankclip(width = 720, height = 480, pixel_type = "RGB32", color = $ffffff, length = 10)
 grid()
 Barrel()

Pin Cushion Distortion
 Barrel(a = 0.005, b = 0.005, c = 0.005, pin = false)

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