>-----Original Message-----
>From: ImageJ Interest Group [mailto:
[hidden email]] On
>Behalf Of Gabriel Landini
>Sent: Monday, June 18, 2007 12:29 PM
>To:
[hidden email]
>Subject: Re: Measuring areas...
>
>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
>