How to get number of white pixels in an image

[ASalcedo]

Hi to all.

I would like to get the number of white pixels in an image (so get the white area).

I see histogram.vi but I do not know how to do that.

Any help?

Thanks a lot!

[ensegre]

How about   or ?

Edited February 6, 2018 by ensegre

[ASalcedo]

14 minutes ago, ensegre said:

How about   or ?

Thanks a lot. I am gonna trying

[ensegre]

PS: you may have to cast number arrays to U32 to avoid wraparound of the sum, if you have more than 32767 pixels, sorry I didn't pay attention to that.

[ASalcedo]

19 minutes ago, ensegre said:

PS: you may have to cast number arrays to U32 to avoid wraparound of the sum, if you have more than 32767 pixels, sorry I didn't pay attention to that.

Sorry, how can I do that? I do not understand really well.

Thanks a lot again.!

[ensegre]

[ASalcedo]

@ensegre How can I do the same but just counting white pixels in a specific ROI? With a mask or something like this?

 

Thanks a lot

[ensegre]

For instance. There is even an Example in the Example Finder for that, Histogram.vi