MatchImageHuMoments

Compare two images using the Hu moment invariants.

Syntax

Definition:

HRESULT MatchImageHuMoments(
    HRESULT                            hrPrev,
    ITcVnImage*                        ipImage1,
    ITcVnImage*                        ipImage2,
    ETcVnContoursMatchComparisonMethod eComparisonMethod,
    double&                            fDissimilarity
)

Parameters

Name

Type

Description

hrPrev

HRESULT

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

ipImage1

ITcVnImage*

First image (1 channel)

ipImage2

ITcVnImage*

Second image (1 channel)

eComparisonMethod

ETcVnContoursMatchComparisonMethod

Method used for comparing the Hu moment invariants of the images

fDissimilarity

double&

Returns the dissimilarity of the image Hu moment invariants depending on the chosen comparison method

MatchImageHuMoments 1: Return value

HRESULT

Required License

TC3 Vision Matching

System Requirements

Development environment

Target platform

PLC libraries to include

TwinCAT V3.1.4024.54 or later

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

Tc3_Vision