Golden Template comparison results

[Joncombat]

I am using CVI to compare an image to a golden template.  The function (imaqCompareGoldenTemplage()) returns an image that is all black (no defects).  How can I determine programmatically if the results passed or failed? 

Jon K.

[jamrite]

Jon,

A possible solution would be to run an "imaqLightMeterRect()" on the same rectangle as the golden template. This returns a "HistogramReport". It can tell you if there are any non-black pixels in the region. You can also use it to perform more complex analysis.

Here's a snippet from my solution:

//Setting up inputs

 InspectionAlignment location;
 InspectionOptions inspectionOptions;

 .

 .  

 inspectionOptions.binary = 1;                         //Displays the defects in binary in the target image

//Call the function

 VisionErrChk(imaqCompareGoldenTemplate(image, goldenTemplate, image, image,

                                               &location, &inspectionOptions));

//Display target image

 imaqSetWindowPalette(0, IMAQ_PALETTE_BINARY, NULL, 0); //Need to set palette type to binary 
 .

 .

//Analyze results

 RotatedRect searchRect;

 HistogramReport* report;

 searchRect = imaqMakeRotatedRect (80, 310, 60, 60, 0); //Same rectangle as the golden template
 report = imaqLightMeterRect(image, searchRect, TRUE, NULL) ;

Hope that helps,

Jaidev Amrite

Applications Engineer

National Instruments