image analysis - using image j (Jul/08/2010 )

hi guys,

i'm trying to analyze some images with image j. i am identifying objects in the image and then measuring their length. i am just wondering if any of you knows a trick to mark all of the objects once and then measure them at the same time rather than marking each of them individually?

thanks in advance.

I used to use imageJ to analyse colony size/number by turning into a binary image, and then using the analyze particles command which gives position, colour and area. I don't know if this will be useful for you or not - but if you are measuring something with known thickness, then you could convert area to length.

I'm sure there'll be a plugin on the imageJ website.