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CreateImageInversePolarTransformMap


Header: FIL.h
Namespace: fil
Module: Calibration

Creates a spatial map representing an image inverse polar transform.

Applications: Data preprocessing for fast inverse polar transform. The result is used by RemapImage.

Syntax

C++
C#
 
void fil::CreateImageInversePolarTransformMap
(
	const fil::ImageFormat& inImageFormat,
	const fil::Point2D& inCenter,
	fil::PolarSpaceType::Type inSpaceType,
	fil::InterpolationMethod::Type inInterpolationMethod,
	fil::SpatialMap& outPolarMap,
	ftl::Optional<fil::Region&> outOutputRegion = ftl::NIL
)

Parameters

Name Type Default Description
Input value inImageFormat const ImageFormat& Information about dimensions, depth and pixel type of the image
Input value inCenter const Point2D&
Input value inSpaceType PolarSpaceType::Type Method of transformation
Input value inInterpolationMethod InterpolationMethod::Type Bilinear Interpolation method used in extraction of image pixel values
Output value outPolarMap SpatialMap& Output spatial map
Output value outOutputRegion Optional<Region&> NIL Pixels set by the spatial map application

Optional Outputs

The computation of following outputs can be switched off by passing value ftl::NIL to these parameters: outOutputRegion.

Read more about Optional Outputs.

Description

The operation generates map that describes image transformation from polar or log-polar space to euclidean space. Two modes of pixel interpolation are available, the bilinear filtering being more precise and computationally expensive. Usually creating map and then using RemapImage is faster than ImageInversePolarTransform. For more information see ImageInversePolarTransform.

See Also

  • RemapImage – Applies a precomputed image transform, defined by a spatial map object.