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ImageAlongArc


Creates an image from pixels traversed along an arc.

Header:AVL.h

Syntax

C++
C#
 
void avl::ImageAlongArc
(
	const avl::Image& inImage,
	const avl::Arc2D& inAxisArc,
	atl::Optional<const avl::CoordinateSystem2D&> inAxisArcAlignment,
	int inScanWidth,
	avl::Axis::Type inAxisType,
	avl::InterpolationMethod::Type inInterpolationMethod,
	avl::Image& outImage,
	atl::Optional<avl::Arc2D&> outAlignedAxisArc = atl::NIL,
	atl::Array<avl::Path>& diagSamplingPoints = atl::Dummy&lt;atl::Array&lt;avl::Path&gt;&nbsp;&gt;()
)

Parameters

Name Type Range Default Description
inImage const Image& Input image
inAxisArc const Arc2D& Input arc
inAxisArcAlignment Optional<const CoordinateSystem2D&> NIL Adjusts the axis arc to the position of the inspected object
inScanWidth int 1 - 5 The width of the stripe of pixels along the given arc
inAxisType Axis::Type Y Type of axis the transformed axis arc will be parallel to
inInterpolationMethod InterpolationMethod::Type Bilinear The interpolation method used to compute pixel brightness in locations of not-integer coordinates
outImage Image& Output image
outAlignedAxisArc Optional<Arc2D&> NIL Input arc after transformation (in the image coordinates)
diagSamplingPoints Array<Path>& Array of paths each one containing the sampling points corresponding to one row of the resulting image

Description

The operation transforms the stripe of pixels of width inScanWidth along the inAxisArc in the way that transforms the arc into straight segment. Two modes of pixel interpolation are available, the bilinear filtering being more precise and computationally expensive.

The optional parameter inAxisArcAlignment defines the transform to be performed on the inAxisArc so that the resulting path is defined in a new context, e.g. returned by one of Template Matching filters.

Examples

ImageAlongArc performed on the sample image with inScanWidth = 50 and inAxisType = X.

See Also

  • ImageAlongPath – Creates an image from pixels traversed along a path.
  • ImageProfileAlongPath – Creates a series of segments across the input path, measures the average pixel intensity on each of the segments, and creates the final profile from that values.