Counting white pixels in a roi

[Alvaro.S]

Hi to all.

I Have an inspection image an a template.

The template is inside inspection image.

I use pattern matching to know the template position (ROI) in the inspection image.

Know I would like to count the white pixels in that found ROI.

How can I do that?

Thanks.

[PalanivelThiruvenkadam]

Get the pixel array from your ROI and Check which ever is white based on your pixel value and count the same

[udka · Accepted solution]

Go to Help->Find Examples->Search for Histogram.
Histogram will give you the array of number of pixels(y) with intensities as x.

[Alvaro.S]

Yes, the problem with histogram.vi is that it calculates pixel information for whole image and I need just for a ROI.

[udka]

If you checked the example which i pointed it gives the Histogram in the ROI and not the entire image.

Ref: http://www.ni.com/example/30677/en/

[PalanivelThiruvenkadam]

Try to share the Code which you tried. so that better guidance can be given based on your view.