DeBarrel

Abstract
Author	V.C.Mohan
Version	30 Dec 2016
Download	movePlus.7z
Category	External filters
License	GPLv3
Discussion	Original DeBarrel plugin, movePlus

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. Full Description

Requirements

• AviSynth+ r2347 or later

Syntax and Parameters

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")

clip   =

Input clip

float  a = 0.005

Coefficient a (xa in independent mode and start val in test mode)

• Between -0.5 and 0.5

float  b = 0.005

Coefficient b (xb in independent mode and start val in test mode)

• Between -0.5 and 0.5

float  c = 0.005

Coefficient c (xc in independent mode and start val in test mode)

• Between -0.5 and 0.5

bool  pin = false

Whether to correct pin cushion or barrel type distortion

• true = pin
• false = barrel

bool  vh = 1.0

Vertical to horizontal distortion ratio

• Between 0.1 and 10

bool  test = false

Whether in test mode

• true = test
• false = normal

float  ea = 0.05

End value of coefficient a in test mode (xea in independent mode)

• Between -0.5 and 0.5

float  eb = 0.05

End value of coefficient b in test mode (xeb in independent mode)

• Between -0.5 and 0.5

float  ec = 0.05

End value of coefficient c in test mode (xec in independent mode)

• Between -0.5 and 0.5

int  nsteps = 20

Number of steps for variation (test mode only)

• Between 0 and 100

Int  frame = 0

Input frame number for over lay (test mode only)

• Within input clip

Int  color = 0

Color of dots in test mode and left out borders in normal

• In RRGGBB format

bool  ind = false

Whether x and y have independent coefficients

• true for independent
• false for pin cushion or barrel

bool  ypin = false

Whether Y direction has pin cushion distortion?

• true for pin cushion
• false for barrel

float  ya = 0.05

Value of coefficient ya (start value in test mode )

• Between -0.5 and 0.5

float  yb = 0.05

Value of coefficient yb (start value in test mode)

• Between -0.5 and 0.5

float  yc = 0.05

Value of coefficient yc (start value in test mode)

• Between -0.5 and 0.5

float  yea = 0.05

End value of coefficient ya (test mode only)

• Between -0.5 and 0.5

float  yeb = 0.05

End value of coefficient yb (test mode only)

• Between -0.5 and 0.5

float  yec = 0.05

End value of coefficient yc (test mode only)

• Between -0.5 and 0.5

Examples

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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