CornerPin

CornerPin will independently transform the four corner points of its input. It is great for relocating 2D images into 3D space e.g. replacing the logo onto the side of a van or shifting a ground plane into position. It is often twinned with the Tracker or PlanarTracker node, from which it will inherit relocation data.

CornerPin has two tabs: the CornerPin2D tab determines where the four points are being moved 'to'. The 'from' tab determines where they are being moved from.

The CornerPin 'from' and 'to' tabs.

Tip: when using the CornerPin, it can be a bit confusing to watch the transform update live on screen. In such instances it can help to temporarily disable the CornerPin (select then press D). The values of the CornerPin can still be edited, bit it will no longer update live.

Tip: The whole process of CornerPinning an object (e.g. poster) into place is made more easy if the source image is the same format as the destination. Try it and see.

A common use of a CornerPin is to transform a format rectangle into a perspective rhomboid, or Vice versa. The snippet demonstrates this.

Press 'Expand' and select and copy everything below this line, then paste into the Nuke node graph.

set cut_paste_input [stack 0]
version 9.0 v7
StickyNote {
inputs 0
name StickyNote16
label "Turn this node off and on to see the result --->"
selected true
xpos -3528
ypos -602
}
CheckerBoard2 {
inputs 0
format "1920 1080 0 0 1920 1080 1 HD_1080"
name CheckerBoard7
selected true
xpos -3301
ypos -761
}
CornerPin2D {
to1 {270 300}
to2 {1805 300}
to3 {1500 800}
to4 {658 800}
invert false
from1 {0 0}
from2 {1920 0}
from3 {1920 1080}
from4 {0 1080}
name CornerPin2D2
selected true
xpos -3301
ypos -603
}
Constant {
inputs 0
channels rgb
color 0.17
format "1920 1080 0 0 1920 1080 1 HD_1080"
name Constant2
selected true
xpos -3155
ypos -744
}
Merge2 {
inputs 2
name Merge5
selected true
xpos -3155
ypos -603
}
Write {
name Write7
selected true
xpos -3155
ypos -579
}
Group {
inputs 0
name Rhomboid
selected true
xpos -3305
ypos -236
}
CheckerBoard2 {
inputs 0
format "1920 1080 0 0 1920 1080 1 HD_1080"
name CheckerBoard8
xpos -571
ypos -18
}
CornerPin2D {
to1 {270 300}
to2 {1805 300}
to3 {1500 800}
to4 {658 800}
invert false
from1 {0 0}
from2 {2048 0}
from3 {2048 1556}
from4 {0 1556}
name CornerPin2D4
xpos -571
ypos 51
}
Output {
name Output1
xpos -571
ypos 84
}
end_group
CornerPin2D {
to1 {0 0}
to2 {1920 0}
to3 {1920 1080}
to4 {0 1080}
invert false
from1 {288 302}
from2 {1710 292}
from3 {1518 696}
from4 {584 700}
name CornerPin2D3
selected true
xpos -3305
ypos -201
}
Constant {
inputs 0
channels rgb
color 0.17
name Constant4
selected true
xpos -3195
ypos -300
}
Merge2 {
inputs 2
name Merge6
selected true
xpos -3195
ypos -201
}
Write {
name Write2
selected true
xpos -3195
ypos -166
}
StickyNote {
inputs 0
name StickyNote17
label "Turn this node off and on to see the result --->"
selected true
xpos -3535
ypos -198
}
StickyNote {
inputs 0
name StickyNote18
label "See the difference between the \n'From' tranform state and the 'to'\ntransform state."
selected true
xpos -3505
ypos -154
}
StickyNote {
inputs 0
name StickyNote19
label "See the difference between the \n'From' tranform state and the 'to'\ntransform state."
selected true
xpos -3508
ypos -578
}
StickyNote {
inputs 0
name StickyNote20
label "A CornerPin used to transform a rhomboid to the format rectangle"
note_font_size 20
selected true
xpos -3564
ypos -348
}
StickyNote {
inputs 0
name StickyNote21
label "A CornerPin used to transform the format rectangle rhomboid to a rhomboid "
note_font_size 20
selected true
xpos -3586
ypos -804
}