CurveTool

Analyse frames into keyed knobs.

raw .mdPress ? for keys

Node	CurveTool
Menu	Other › CurveTool
Names in each format
.oink comp (JSON)	`"type": "OC_N_curvetool"`
.nk script	`CurveTool` (how .nk import works)
Python	`nuke.createNode("CurveTool")`
Assistant (MCP)	`create_node(type="CurveTool")`
Tab search	`curvetool`, or its initials `ct`

CurveTool properties

Inputs and outputs

Port	Name	Type
input 0	Image	image
output 0	Image	image

Knobs

Panel tab Curvetool, in panel order.

Knob	Label	Type	Default	Range / values	.nk knob	Description
`go_first`	first frame (0 = comp)	float	`0`	0 to 100000 (integer)		Go!: first frame (0 with last 0 = the comp's range)
`go_last`	last frame	float	`0`	0 to 100000 (integer)
`operation`	Curve Type	menu	`Avg_Intensities`	Auto_Crop (Auto Crop), Avg_Intensities (Avg Intensities), Exposure_Difference (Exposure Difference), Max_Luma_Pixel (Max Luma Pixel)	`operation`
`channels`	channels	text	`rgba`		`channels`
`ROI`	ROI	vector ×4	`0, 0, 0, 0`	-10000 to 10000	`ROI`
`autocropdata`	autocropdata	vector ×4	`0, 0, 0, 0`	-10000 to 10000	`autocropdata`
`intensitydata`	intensitydata	colour ×4	`0, 0, 0, 0`	0 to 1	`intensitydata`
`maxlumapixdata`	maxlumapixdata	vector ×2	`0, 0`	-10000 to 10000	`maxlumapixdata`
`maxlumapixvalue`	maxlumapixvalue	colour ×3	`0, 0, 0`	0 to 1	`maxlumapixvalue`
`minlumapixdata`	minlumapixdata	vector ×2	`0, 0`	-10000 to 10000	`minlumapixdata`
`minlumapixvalue`	minlumapixvalue	colour ×3	`0, 0, 0`	0 to 1	`minlumapixvalue`

Other knobs (Python, .nk and the assistant; not on the panel)

Knob	Label	Type	Default	Range / values	.nk knob	Description
`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
`avgframes`	Frames to Average	int	`2`	0 to 2147483647	`avgframes`

NoOp

Does nothing; holds user knobs / expressions.

Assert

Fail with a message when the expression is false.

On this page

Inputs and outputs Knobs Other knobs (Python, .nk and the assistant; not on the panel)