low contrast image analyses

[Jorge A. Santiago-Blay]

Hello ImageJ users:

A colleague of mine and I are analyzing fossil leaf images with damage
markings. The images themselves have low contrast and enhancing contrast
followed by thresholding is not helping much.

The next idea we have is to click on a well defined damaged area and tell
ImageJ to expand the pixels from the clicked point until it "sees" a
boundary. Is there a way to do that? In other words, what we are trying
*not* to do, is to manually tell ImageJ what areas to calculate as it will
take a long time.

If you have a constructive suggestion, please kindly email me directly,
[hidden email]

Gratefully,

Jorge

Jorge A. Santiago-Blay, PhD
blaypublishers.com

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[Krs5]

Dear Jorge,

Sounds you are looking for an Active contour (also known as Snake) plugin. There are several on the imageJ website. The link to the Thomas Boudier website seems to be lost but you can find the plugin at http://imagejdocu.tudor.lu/plugin/segmentation/active_contour/start

Best wishes

Kees


Dr Ir K.R. Straatman
Senior Experimental Officer
Advanced Imaging Facility
Centre for Core Biotechnology Services
University of Leicester
www.le.ac.uk/advanced-imaging-facility

ImageJ workshops 15 and 16 July, Leicester, UK

-----Original Message-----
From: ImageJ Interest Group <[hidden email]> On Behalf Of Jorge A. Santiago-Blay
Sent: 14 May 2019 15:45
To: [hidden email]
Subject: low contrast image analyses

Hello ImageJ users:

A colleague of mine and I are analyzing fossil leaf images with damage markings. The images themselves have low contrast and enhancing contrast followed by thresholding is not helping much.

The next idea we have is to click on a well defined damaged area and tell ImageJ to expand the pixels from the clicked point until it "sees" a boundary. Is there a way to do that? In other words, what we are trying
*not* to do, is to manually tell ImageJ what areas to calculate as it will take a long time.

If you have a constructive suggestion, please kindly email me directly, [hidden email]

Gratefully,

Jorge

Jorge A. Santiago-Blay, PhD
blaypublishers.com

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