Corrected question: How can I measure object length?

[Jonathan Rosenthal]

Hello again,
   I just saw the typo in the message I just sent - so here's the  
corrected version.
    I'd like to use ImageJ to measure the length of some caterpillars  
in digital images. When I clicked on "Analyze" and then "Set  
Measurements" it seemed that all the options were for area, none for  
length. I'm guessing there has to be some way to measure length - if  
you know, please tell me.

Thanks very much,

Jonathan Rosenthal
Visiting Scholar
Dept. of Biology
Vassar College

[David Hovis]

When you use a line selection, length and angle are the two implied  
measurements.   If you use a line selection and then "Analyze-
 >Measure", you will see that you "length" and "angle" in addition to  
the options selected in "Analyze->Set Measurements...".

--David


On Oct 3, 2009, at 9:45 PM, Jonathan Rosenthal wrote:

> Hello again,
>  I just saw the typo in the message I just sent - so here's the  
> corrected version.
>   I'd like to use ImageJ to measure the length of some caterpillars  
> in digital images. When I clicked on "Analyze" and then "Set  
> Measurements" it seemed that all the options were for area, none for  
> length. I'm guessing there has to be some way to measure length - if  
> you know, please tell me.
>
> Thanks very much,
>
> Jonathan Rosenthal
> Visiting Scholar
> Dept. of Biology
> Vassar College