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. 4024.44 or later

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

Tc3_Vision