image concavity

[dima shawahneh]

hello every one
im searching for a method to detect image concavity
that is ..a concave exists in this image or not .. and its degree

thanks..

[DdoubleD]

I found the question interesting, so I decided to look around the internet a little. It's an interesting topic--what are you using it for?

Anyway, I did run into this link containing what looks like some well-written shape analytics. Although I have not looked into it deep enough to determine whether the value it returns for NOT convex is reliable, which the comments indicate it is then concave, I thought it was worthy of passing along: Shapes.cs

I should point out that the code requires other libraries, but I believe it is all open source. Just search for the required namespace and include the word "library" (eg "ActiveAppearanceModel library") on the Koders.com website. In that example I gave, it will bring up a link to the ActiveAppearanceModel.cs file...click on it and it will bring up a page where the project link is located: ActiveAppearanceModel.cs, and project links to the left..., etc.

[dima shawahneh]

thanks a lot :)
I'm now having a deep look to check if it could help or not

as an answer for your question:
this is an idea that could help me in distinguishing between two images .. each image represents a character ..
related to my project : handwriting recognition ..

i will reply again after checking if it is working or not..
thanks again

[DdoubleD]

Sure. I added an edit to the end of my post and wasn't sure if you saw it, so take another peek...

[ddanbe]

Perhaps this site something to consider.

[dima shawahneh]

i think im having a search problem..i think that i should find dll
for ActiveAppearanceModel and C5 and dnAnalytics needed in source file we are talking about
but i searched finding no suitable results :(

ddanbe
im afraid ur site is not working
can u check it plz

thanks all

[DdoubleD]

i think im having a search problem..i think that i should find dll
for ActiveAppearanceModel and C5 and dnAnalytics needed in source file we are talking about
but i searched finding no suitable results :(

ddanbe
im afraid ur site is not working
can u check it plz

thanks all

I think you need to register and install Subversion software to obtain packaged projects--it's an open-source group project. From what I could see, you can still obtain/download all of the files, including the project files, and add them to your solution. I realize that is a lot of work for just wanting to check into it...

As far as that link ddanbe gave you, there is a minor typo in the address. Just delete the last two characters from the address in your browser window and it will navigate to the site. EDIT: Silly me, here is the correct address: Concave Hull

[ddanbe]

Perhaps I forgot to copy some chars, so here it is again:http://ubicomp.algoritmi.uminho.pt/local/concavehull.html
I tested it and it works, hope it works with you guys also.

[dima shawahneh]

for
http://ubicomp.algoritmi.uminho.pt/l...ncavehull.html
it provides java API
im working on C#.net

any way .. thanks a lot 4 all

[ddanbe]

Java,yes:yawn: Life can be hard sometimes when you are a C# programmer. But if I were you I would go searching the net for algorithms. Even if they where written in Klingon, I would start to learn Klingon

[dima shawahneh]

some times we are limited by time and can't learn any thing
specially if we only want to check it working or not..

despite of all of this,i appreciate what u said
thanks