How to calculate amount of connected pixels in blob of an intensity image

Hello,

My aim is to calculate the amount of connected pixels in a 'blob'.

I only need to know the amount in the blob with the largest number of pixels.

I only want to include pixels in the blob that have a value greater than 1.

I have included two examples of the type of intensity images I am looking to analyse.

I have looked into regionprops but either I don't understand it or it isn't what I'm looking for.

Any help is really appreciated.

Many thanks,

Ollie

Answer 1

[Matt J]

area=bwarea( bwareafilt(intensityImage>1,1)  )