detect scratches on a camera lens

[muks]

Canny though will take some time. You can replace canny with any good edge detection. But I suppose the above method should work Post back if you are stuck.

[muks]

solved?

[Yesh]

Unable to open the sub vi. One of the functions in subvi mask from ROI is missing.

I am unable to find it in the labview 9.0. ALso I had a question of rotating

the image. I always had this problem when pattern matching, or geometric

matching when I move my camera the pattern matching algorithm doesnt

work. I also really appreciate your help and time.

[muks]

Pattern matching not working with rotated images means you wouldve most likely selected "maintain image size" in the rotation. Uncheck that it will work.

Coming to this particular issue. I have not used any patternmatching here. All i have done is edge detection-->threshold-->dilation-->fill holes--> particle analysis(Area). The idea is fill hole fills a large area if the grid is distorted and after particle analysis if you find any area larger than 100000 then it means there is some distortion. I am having some difficulty in posting the screen shot. Lemme get back.

[muks]

This was created from vision assistant so the steps should basically help.

[Arjun247]

I now have an idea of what u are talking about.

I will trying to wrap this up by weekend. I wil keep

you posted. Muks thanx for u r time, I really appreciate

 u r help.

[Yesh]

Arjun

Are you working on a similar project as I am. Have you got

any result. plz let me know. 

[muks]

Yesh,

Got an idea?

[muks]

Any update?

[Yesh]

Muks

I hardly got time to work on this project, just began working on it. The code you wrote

confused me. Why did you rotate the image, how does it help. WHat I did was

I converted image to grey scale because canny edge wouldnot work for color images.

I donot see any image in the output. Infact I donot see anything after I threshold the image.

What did you see on your image output window. Just let me know.