Re: Maximum length and maximum width

[Nirendra Mustafi]

Dear ImageJ User-group,

Is there any way to get the values of the 'maximum length' and the
'maximum width' dimensions of an irregular shaped object in a selected
ROI? I can find 'bounding rectangle' option in 'save measurements' under
'Analyze' tool which produces results of length and width of the
bounding rectangle. However, I'm not sure whether it is the maximum
length or width for the object!

Any help will be highly appreciated.
Many thanks in advance

--
##########################################
Nirendra Nath Mustafi
Thermodynamics Lab.
Mechanical Engineering Department
The University of Auckland
Private Bag 92019
Auckland, New Zealand
Ph.: [phone] Ext 87007 (Work)
        [phone] (Home)
Fax: [phone]
E-Mail: [hidden email]

[Michael Miller]

Hello,

Since there have been no responses to this question, is ImageJ currently not
capable of these types of measurements?

I've always assumed ImageJ couldn't do this except via computing major and
minor axis of particles, and I've spent considerable time developing a
technique to get better measurements about the length and width of an
object.

In short by generating the Blum medial axis, I get width at every point.
Finding the max is trivial at this point. I can also easily compute the
length of the medial axis by methods recently discussed.

Obviously I'd like to hear that my work is novel, but if existing methods
are in place I'd like to compare my results for validity.

-Mike

----- Original Message -----
From: "Nirendra Mustafi" <[hidden email]>
To: <[hidden email]>
Sent: Monday, March 05, 2007 3:42 PM
Subject: Re: Maximum length and maximum width

> Dear ImageJ User-group,
>
> Is there any way to get the values of the 'maximum length' and the
> 'maximum width' dimensions of an irregular shaped object in a selected
> ROI? I can find 'bounding rectangle' option in 'save measurements' under
> 'Analyze' tool which produces results of length and width of the bounding
> rectangle. However, I'm not sure whether it is the maximum length or width
> for the object!
>
> Any help will be highly appreciated.
> Many thanks in advance
>
> --
> ##########################################
> Nirendra Nath Mustafi
> Thermodynamics Lab.
> Mechanical Engineering Department
> The University of Auckland
> Private Bag 92019
> Auckland, New Zealand
> Ph.: [phone] Ext 87007 (Work)
> [phone] (Home)
> Fax: [phone]
> E-Mail: [hidden email]