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Extrusão de borda

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2026-09-07

ToolSets/filter/edgeExtrude.nk

filtro

borda

borrão

máscara

utilidade

registro

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Expande a cor da borda para fora com uma pilha de desfoque multiescala, erosão de máscara opcional e manipulação de espaço logarítmico para composições do Nuke.

A extrusão de borda espalha os pixels da borda para fora usando uma cascata de desfoques de caixa em tamanhos crescentes, cada um com máscara rígida no canal alfa e mesclado sob o original. O resultado preenche ou estende a cor da borda sem um simples halo de desfoque único.

Encaminhe a imagem para a entrada principal. Opcionalmente, conecte uma máscara e escolha seu canal; os controles de erosão e inversão definem o quanto a máscara é aproximada antes da extrusão. O tamanho determina a quantidade de desfoques; a qualidade é compartilhada entre todos os desfoques.

Quando o Log está ativado, a placa é convertida para Cineon para a extrusão e vice-versa, o que mantém o empuxo de borda mais estável em placas Log. Use-o para engrossar bordas, cobrir franjas ou reconstruir detalhes de borda ausentes antes de mesclagens e chaves.

Script code

set cut_paste_input [stack 0]
version 9.0 v7
push 0
push $cut_paste_input
Group {
 inputs 2
 name edgeExtrude
 tile_color 0x421010ff
 selected true
 xpos 480
 ypos 114
 addUserKnob {20 User l edgeExtrude}
 addUserKnob {41 from0 l "mask channel" T Copy1.from0}
 addUserKnob {7 erodeMask l "erode mask" R 0 100}
 erodeMask 10
 addUserKnob {6 invertMask -STARTLINE}
 addUserKnob {41 size T master.size}
 addUserKnob {52 group T "import nuke\nknobChanged \"\\n\\ng = nuke.thisNode()\\nk = nuke.thisKnob()\\n\\nif k.name() in \\\[\\\"frames\\\",\\\"method\\\"]:\\n    \\n    i = nuke.toNode(\\\"img\\\")\\n    i2 = nuke.toNode(\\\"mask\\\")\\n    o = nuke.toNode(\\\"Output1\\\")\\n    c = nuke.toNode(\\\"Copy1\\\")\\n\\n    if k.name() == \\\"frames\\\":\\n    \\n        defaultNodes = \\\[i,i2,o,c]\\n        for n in nuke.allNodes():\\n           if n not in defaultNodes:\\n               nuke.delete(n)\\n        \\n        fvalue = g\\\['frames'].value()\\n        step = 1\\n        if fvalue < 0:\\n           step = -1\\n          \\n        for f in range(0,int(fvalue)+step,step):\\n           t = nuke.nodes.TimeOffset()\\n           t\\\['time_offset'].setValue(-f)\\n           t.setInput(0,i)\\n        \\n           if f == 0 :\\n               lastnode = t\\n        \\n           else :\\n               slice = nuke.nodes.Grade()\\n               slice\\\['channels'].setValue(\\\"alpha\\\")\\n               slice\\\['blackpoint'].setValue((1/(fvalue+1))*abs(f))\\n               slice\\\['whitepoint'].setValue((1/(fvalue+1))*(abs(f)+1))\\n               slice.setInput(0,c)\\n               exp = nuke.nodes.Expression()\\n               if g\\\['method'].value() == \\\"average\\\":\\n                   exp\\\['expr3'].setValue('a>1?1:a')\\n               else:\\n                   exp\\\['expr3'].setValue('a>0?1:0')\\n               exp.setInput(0,slice)\\n               km = nuke.nodes.Keymix()\\n               km.setInput(1,t)\\n               km.setInput(0,lastnode)\\n               km.setInput(2,exp)\\n               lastnode = km\\n        \\n        sw = nuke.nodes.Switch()\\n        sw.setInput(0,i)\\n        sw.setInput(1,lastnode)\\n        sw\\\['which'].setExpression('parent.maskChannel!=0')\\n        o.setInput(0,sw)\\n            \\n        for n in nuke.allNodes():\\n           nuke.autoplace(n)\\n\\n    elif k.name() == \\\"method\\\":\\n\\n        for e in nuke.allNodes('Expression'):\\n               if g\\\['method'].value() == \\\"average\\\":\\n                   e\\\['expr3'].setValue('a>1?1:a')\\n               else:\\n                   e\\\['expr3'].setValue('a>0?1:0')\\n\\n\"" +STARTLINE}
 addUserKnob {41 quality -STARTLINE T master.quality}
 addUserKnob {6 log -STARTLINE}
 log true
 addUserKnob {26 ""}
 addUserKnob {26 lbl l "" +STARTLINE T "Edge Extrude v1.2"}
 addUserKnob {22 btn l DerekVFX.ca T "nuke.tcl('start', 'https://derekvfx.ca')" +STARTLINE}
}
 Input {
  inputs 0
  name mask
  xpos -137
  ypos -799
  number 1
 }
set Na4475400 [stack 0]
push $Na4475400
 Copy {
  inputs 2
  from0 rgba.alpha
  to0 rgba.alpha
  name Copy1
  xpos -137
  ypos -751
  disable {{"\[exists parent.input1] == 0"}}
 }
set N492aa800 [stack 0]
push $N492aa800
 Dot {
  name Dot2
  xpos -208
  ypos -741
 }
 Invert {
  channels alpha
  name Invert1
  xpos -242
  ypos -696
 }
 Dot {
  name Dot4
  xpos -208
  ypos -623
 }
 Switch {
  inputs 2
  which {{invertMask}}
  name Switch1
  xpos -137
  ypos -627
 }
 Dilate {
  channels alpha
  size {{abs(erodeMask)*-1+-1}}
  name Dilate1
  xpos -137
  ypos -575
 }
 Input {
  inputs 0
  name Input
  xpos 27
  ypos -729
 }
 Colorspace {
  colorspace_out Cineon
  name Colorspace1
  xpos 27
  ypos -626
  disable {{"parent.log != 1"}}
 }
 Merge2 {
  inputs 2
  operation mask
  bbox B
  name Merge1
  xpos 27
  ypos -501
 }
 Dot {
  name Dot3
  xpos 61
  ypos -428
 }
set Nc32cdc00 [stack 0]
 Dot {
  name Dot1
  xpos 370
  ypos -428
 }
 Blur {
  channels rgba
  size {{parent.master.size/32}}
  filter box
  quality {{parent.master.quality}}
  name Blur5
  label "\[value size] px"
  xpos 336
  ypos -380
 }
set Nb0597800 [stack 0]
 Unpremult {
  name Unpremult5
  xpos 336
  ypos -342
 }
 Expression {
  expr3 "a != 0"
  name Expression1
  xpos 336
  ypos -316
 }
 Blur {
  channels rgba
  size {{parent.master.size/16}}
  filter box
  quality {{parent.master.quality}}
  name Blur13
  label "\[value size] px"
  xpos 343
  ypos -293
 }
set Nb0596000 [stack 0]
 Unpremult {
  name Unpremult13
  xpos 336
  ypos -255
 }
 Expression {
  expr3 "a != 0"
  name Expression13
  xpos 336
  ypos -229
 }
 Blur {
  channels rgba
  size {{parent.master.size/8}}
  filter box
  quality {{parent.master.quality}}
  name Blur15
  label "\[value size] px"
  xpos 336
  ypos -203
 }
set Nc1a1f400 [stack 0]
 Unpremult {
  name Unpremult15
  xpos 336
  ypos -165
 }
 Expression {
  expr3 "a != 0"
  name Expression15
  xpos 336
  ypos -139
 }
 Blur {
  channels rgba
  size {{parent.master.size/4}}
  quality {{parent.master.quality}}
  name Blur16
  label "\[value size] px"
  xpos 336
  ypos -113
 }
set Nc1a1f000 [stack 0]
 Unpremult {
  name Unpremult16
  xpos 336
  ypos -75
 }
 Expression {
  expr3 "a != 0"
  name Expression16
  xpos 336
  ypos -49
 }
 Blur {
  channels rgba
  size {{parent.master.size/2}}
  quality {{parent.master.quality}}
  name Blur17
  label "\[value size] px"
  xpos 336
  ypos -19
 }
set Na4475000 [stack 0]
 Unpremult {
  name Unpremult17
  xpos 336
  ypos 19
 }
 Expression {
  expr3 "a != 0"
  name Expression17
  xpos 336
  ypos 45
 }
 Blur {
  channels rgba
  size {{parent.master.size}}
  quality {{parent.master.quality}}
  name Blur18
  label "\[value size] px"
  xpos 336
  ypos 71
 }
set Na4475c00 [stack 0]
 Unpremult {
  name Unpremult18
  xpos 336
  ypos 116
 }
 Expression {
  expr3 "a != 0"
  name Expression18
  xpos 336
  ypos 131
 }
 Blur {
  channels rgba
  size {{parent.master.size*2}}
  quality {{parent.master.quality}}
  name Blur19
  label "\[value size] px"
  xpos 336
  ypos 157
 }
 Unpremult {
  name Unpremult6
  xpos 336
  ypos 195
 }
 Expression {
  expr3 "a != 0"
  name Expression6
  xpos 336
  ypos 221
 }
push $Na4475c00
push $Na4475000
push $Nc1a1f000
push $Nc1a1f400
push $Nb0596000
push 0
push $Nb0597800
push $Nc32cdc00
 Merge2 {
  inputs 8+1
  operation under
  bbox B
  invert_mask true
  name Merge4
  xpos 27
  ypos 221
 }
 Colorspace {
  colorspace_in Cineon
  name Colorspace2
  xpos 27
  ypos 293
  disable {{"parent.log != 1"}}
 }
 Output {
  name Output1
  xpos 27
  ypos 356
 }
push $Nc32cdc00
 Blur {
  channels rgba
  size 20
  name master
  label "\[value size] px"
  xpos 154
  ypos -384
  hide_input true
 }
push $Nb0597800
 Viewer {
  frame_range 100-100
  colour_sample_bbox {-0.15625 0.2568359375 -0.1552734375 0.2578125}
  name Viewer1
  xpos 1872
  ypos 1458
 }
end_group