(no subject)

[Miss Jenny Wang]

Hi all,
I'm currently trying to figure out a way to measure the area/density etc of the defect in the calvaria found at this address:
http://jwan-calvaria.blogspot.com/2010/01/hi-if-anyone-has-any-ideas-on-how-to.html
. I've tried adjusting thresholds but it does not help as the defect itself contains different densities, anyone have any ideas (besides using free hand selection as that is not as consistent as i would like). Please email me to let me know any ideas, suggestions.
I can be reached on
[hidden email]<mailto:[hidden email]>

Regards,
Jenny

[Michael Cammer-2]

Set the spatial calibration based on the standard at the top of the pic.

Set measurement for Area.

Trace the object of interest and measure it.

Also recommend getting the area of the entire structure in case you
later want to report results as percent of whole as well as by
absolute #s.

-Michael

On Sat, Jan 30, 2010 at 2:21 AM, Miss Jenny Wang
<[hidden email]> wrote:

> Hi all,
> I'm currently trying to figure out a way to measure the area/density etc of the defect in the calvaria found at this address:
> http://jwan-calvaria.blogspot.com/2010/01/hi-if-anyone-has-any-ideas-on-how-to.html
> . I've tried adjusting thresholds but it does not help as the defect itself contains different densities, anyone have any ideas (besides using free hand selection as that is not as consistent as i would like). Please email me to let me know any ideas, suggestions.
> I can be reached on
> [hidden email]<mailto:[hidden email]>
>
> Regards,
> Jenny
>

--
Michael Cammer  *  http://coxcammer.com/
[hidden email]  or  [hidden email]
H 914-632-3044     Cell 914-309-3270

[puzzlebobble]

have you already taken the photos?

an alternative would be to put something bright blue etc. behind the hole (it is hole? i haven't a clue what that's a photo of). Then write a little program to count the number of pixels which are very blue but low red and low green (might need some calibration to check your settings don't produce false positives; maybe you could only count those pixels which have a blue pixel on at least 2 sides of them to reduce the false+). Of course that'd give you pixel numbers rather than an absolute size.