Re: Measuring areas...

Posted by Gabriel Landini on Jun 18, 2007; 5:29pm
URL: http://imagej.273.s1.nabble.com/Measuring-areas-tp3699083p3699088.html

On Monday 18 June 2007 16:57:01 Rotella, Anthony M. (GRC)[] wrote:
> Oh geez. So lets say I went through a thresholded image, and just simply
> counted the pixels. Is this a compatible area measurement if I wanted to
> use these numbers with area calculated with the "Analyze Particle"
> operation? My number seems accurate, but it would be nice to make sure
> I'm not doing anything stupid. Thanks..

I suppose that if you are counting total area of an image, then number of
pixels is fine. I was just giving a follow up on the various logics to follow
when encoding areas and perimeters.

If you want to go and look at particle size distributions and so on, then you
have to know what assumptions are behind the different algorithms.
For example, what are 5 pixels on a row? You can consider it a blob of area=5
pixels or a line of length=4 and area=0.

Cheers,
G