DistanceTransformation

Calculates the distance transformation, which is the distance to the closest zero pixel in a binary image. Additionally, an image with component labels is created (discrete Voronoi diagram).

Syntax

Definition:

HRESULT DistanceTransformation(
    HRESULT                          hrPrev,
    ITcVnImage*                      ipSrcImage,
    ITcVnImage*&                     ipDestImage,
    ETcVnDistanceType                eDistanceType,
    ETcVnDistanceTransformationMask  eMaskSize,
    ITcVnImage**                     pipDestLabels = nullptr,
    ETcVnDistanceTransformationLabel eLabelType = DTL_CCOMP
)

Parameters

Name

Type

Default

Description

hrPrev

HRESULT

 

HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.)

ipSrcImage

ITcVnImage*

 

Source image (USINT, 1 channel)

ipDestImage

ITcVnImage*&

 

Destination image (REAL, 1 channel. An appropriate destination image will be created if required.)

eDistanceType

ETcVnDistanceType

 

Distance computation method (supported: L1, L2, C)

eMaskSize

ETcVnDistanceTransformationMask

 

Size of the distance transformation mask (PRECISE not supported for label computation)

pipDestLabels

ITcVnImage**

nullptr

Returns the component labels (Discrete Voronoi diagram; DINT, 1 channel. An appropriate image will be created if required.)

eLabelType

ETcVnDistanceTransformationLabel

DTL_CCOMP

Type of the labels

DistanceTransformation 1: Return value

HRESULT

Required License

TC3 Vision Base

System Requirements

Development environment

Target platform

PLC libraries to include

TwinCAT V3.1.4024.59 or later

PC or CX (x64) with min. PL50, e.g. Intel 4-core Atom CPU

Tc3_Vision