How to set a pixel count threshold?

[PeterChang]

I want to exclude any dots or round spots on a image and only keep elongated pixels. For example wrinkles.
DSC04556f.jpg

i want to keep just the long lines of black pixels and exclude the round dots.

Anyway I can do this?

[Jacqueline Ross]

Hi Peter,

The easiest way to measure the longer lines of pixels is to use the particle analyser - Analyze - Analyze Particles. You can then specify a minimum size, e.g. I used 500 pixels and only got the longer strings in your image. You can also filter out based on circularity.

Kind regards,

Jacqui

Jacqueline Ross
Biomedical Imaging Microscopist
Biomedical Imaging Research Unit 
School of Medical Sciences 
Faculty of Medical & Health Sciences
The University of Auckland
Private Bag 92019
Auckland 1142, NEW ZEALAND

Tel: [phone]
Fax: [phone]

http://www.fmhs.auckland.ac.nz/sms/biru/


-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of PeterChang
Sent: Tuesday, 28 January 2014 7:07 a.m.
To: [hidden email]
Subject: How to set a minimum pixel count?

I want to exclude any dots or round spots on a image and only keep elongated pixels. For example wrinkles.
DSC04556f.jpg <http://imagej.1557.x6.nabble.com/file/n5006301/DSC04556f.jpg>  

i want to keep just the long lines of black pixels and exclude the round dots.

Anyway I can do this?



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