The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » Software » comp.soft-sys.matlab

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Crack detection
Replies: 1   Last Post: Dec 12, 2012 4:45 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Eric Keller

Posts: 27
Registered: 12/9/10
Re: Crack detection
Posted: Dec 12, 2012 4:45 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

"Mee2XuH " <> wrote in message <kaade8$gt4$>...
> Hello,
> I work with algorithm to detect cracks or damages on material. I have a lot of images with and without damage (cracks), so do you have any ideas how do I detect a cracks on it?

I have thought about this problem a lot, but never was motivated enough to do anything about it. We do have a paper on a fairly elaborate method "Symbolic Dynamic Filtering for Image Analysis: Theory and Experimental Validation," Signal, Image, and Video Processing, Volume 4, No. 3

I'm hardly an image processing expert, but this simple method looks like it might work:
1. Register the image so that the same spot on the sample corresponds to the same pixels in the image.
2. Correct the light levels so they are all the same (difficult because the cracks will lower average brightness levels). Histograms?
3. subtract an image from the un-cracked specimen.
4. Cracked areas show large differences. You can use some sort of metric to calculate your state of damage.

Date Subject Author
Read Crack detection
Read Re: Crack detection
Eric Keller

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.