ImageMarchingSquares

Source (.js)Source (.d.ts)

Introduction

vtkImageMarchingSquares - generate isolines from one slice of a vtkImageData

vtkImageMarchingSquares is a filter that takes a vtkImageData as input and generates, using the marching squares case table, a vtkPolyData containing one polyline per contour value on the selected slice.

Methods

extend

Method used to decorate a given object (publicAPI+model) with vtkImageMarchingSquares characteristics.

Argument	Type	Required	Description
publicAPI		Yes	object on which methods will be bounds (public)
model		Yes	object on which data structure will be bounds (protected)
initialValues	IImageMarchingSquaresInitialValues	No	(default: {})

getContourValues

Get the list of contour values.

getMergePoints

Get whether points shared by neighboring pixels are merged.

getPixelPoints

Cache the world coordinates of the four corners of the pixel whose origin is ijk.

Argument	Type	Required	Description
ijk	Vector3	Yes	origin of the pixel
kernelX	Number	Yes	index of the X element
kernelY	Number	Yes	index of the Y element
indexToWorld	IndexToWorld	Yes

getPixelScalars

Cache the point ids and the scalar values of the four corners of the pixel whose origin is ijk.

Argument	Type	Required	Description
ijk	Vector3	Yes	origin of the pixel
dims	Vector3	Yes	dimensions of the image
scalars	TypedArray or Array[Number]	Yes
increments	Vector3	Yes	IJK slice increments
kernelX	Number	Yes	index of the X element
kernelY	Number	Yes	index of the Y element

getSlice

Get the index of the slice the contours are extracted from.

getSlicingMode

Get the index of the axis along which the image is sliced.

newInstance

Method used to create a new instance of vtkImageMarchingSquares

Argument	Type	Required	Description
initialValues	IImageMarchingSquaresInitialValues	No	for pre-setting some of its content

produceLines

Append the line segments contributed by one pixel to points and lines.

Argument	Type	Required	Description
cVal	Number	Yes	contour value
ijk	Vector3	Yes	origin of the pixel
dims	Vector3	Yes	dimensions of the image
scalars	TypedArray or Array[Number]	Yes
points	Array[Number]	Yes
lines	Array[Number]	Yes
increments	Vector3	Yes	IJK slice increments
kernelX	Number	Yes	index of the X element
kernelY	Number	Yes	index of the Y element
indexToWorld	IndexToWorld	Yes

requestData

Argument	Type	Required	Description
inData		Yes
outData		Yes

setContourValues

Set the list of contour values.

Argument	Type	Required	Description
cValues	Array[Number]	Yes

setMergePoints

Set whether points shared by neighboring pixels are merged.

Argument	Type	Required	Description
mergePoints	Boolean	Yes

setSlice

Set the index of the slice the contours are extracted from.

Argument	Type	Required	Description
slice	Number	Yes

setSlicingMode

Set the index of the axis along which the image is sliced (0: I, 1: J, 2: K).

Argument	Type	Required	Description
slicingMode	Number	Yes