LensDistortion

Undistort / redistort with radial k1, k2 (same model as the CameraTracker solve).

Undistort / redistort with radial k1, k2 (same model as the CameraTracker solve). Output STMap for the STMap node.

Node	LensDistortion
Menu	Transform › LensDistortion
Names in each format
.oink comp (JSON)	`"type": "OC_N_lensdistortion"`
.nk script	`LensDistortion2`, also imports `LensDistortion` (how .nk import works)
Python	`nuke.createNode("LensDistortion2")`
Assistant (MCP)	`create_node(type="LensDistortion")`
Tab search	`lensdistortion`, or its initials `ld`

LensDistortion properties

Inputs and outputs

Panel tab Lensdistortion, in panel order.

Knob	Label	Type	Default	Range / values	.nk knob	Description
`channels`	channels	menu	`all`	rgba, rgb, alpha, all, none		Layer the op applies to: rgb, rgba, alpha, all, none, <layer> or <layer>.<ch>
`mode`	mode	menu	`undistort`	undistort, redistort	`output`
`output`	output	menu	`image`	image (Image), stmap (STMap)	`outputType`
`k1`	k1	float	`0`	-0.5 to 0.5	`k1`
`k2`	k2	float	`0`	-0.5 to 0.5	`k2`
`center_offset`	centre offset	vector ×2	`0, 0`	-500 to 500	`center_offset`
`filter`	filter	menu	`cubic`	cubic (Cubic), bilinear (Bilinear)	`filter`
`mask_channel`	mask	menu	`none`	none, rgba.alpha, rgba.red, rgba.green, rgba.blue		Mask channel, e.g. rgba.alpha (none = no mask)
`inject`	inject	bool	`false`			Copy the mask into mask.a for nodes downstream
`invert_mask`	invert	bool	`false`		`invert_mask`
`fringe`	fringe	bool	`false`			Only apply the effect at the edges of the mask
`unpremult`	(un)premult by	menu	`none`	none, rgba.alpha
`invert_unpremult`	invert	bool	`false`			(Un)premultiply by 1 - alpha
`mix`	mix	float	`1`	0 to 1	`mix`

Knob	Label	Type	Default	Range / values
`gl_color`	Viewer Controls Color	float ×3	`0, 0, 0`	0 to 1
`postage_stamp_frame`	Static Frame	int	`1`	-2147483648 to 2147483647
`lifetimeStart`	Lifetime Start	int	`0`	-2147483648 to 2147483647
`lifetimeEnd`	Lifetime End	int	`100`	-2147483648 to 2147483647
`useLifetime`	Use Lifetime	boolean	`false`
`cached`	Cached	boolean	`false`
`bookmark`	Bookmark	boolean	`false`
`dope_sheet`	Dope Sheet	boolean	`false`
`clone_group`	Clone Group	string
`link_source`	Link Source	string
`link_overrides`	Link Overrides	string
`split_views`	Split Views	string

Other .nk knobs use the same name here. See .nk import.

Open these from Help › Examples…, or from the ? menu in this node's Properties panel.

LensDistortion: undistort and STMap (examples/transform/lens_distortion.oink): LensDistortion with a barrel k1 undistorts the Golden Gate photo. A second LensDistortion writes the same warp as an STMap (uv in red/green), and the STMap node applies it: that is how distortion is handed between packages.