How to Create Defect Class for Image Processing?

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Afrena Azman
Afrena Azman on 30 Nov 2021
Commented: Afrena Azman on 1 Dec 2021
Good day everyone, I have a code to inspect part's surface using image processing. And i want one of my output to show the scratches class such as:
class 1 scratch;
class 2 scratch;
class 3 scratch.
I've already calculate the total area of the image for this system. How can I generate the coding for this kind of output? Thank you so much for your replies.

Answers (2)

Image Analyst
Image Analyst on 30 Nov 2021
Maybe try thresholding with the 'adaptive' option in imbinarize().
Or try a bottomhat filter with imbothat().
Or try getting a standard deviation image with stdfilt() and then thresholding.
Once you have the binary image you can measure all kinds of features with regionprops, like area, perimeter, maximum length, etc. Then you can train it with the Classification Learner app to take all those features and make a prediction as to what kind of defect (Class 1 scratch, class 2 scratch, etc.) it is.
Afrena Azman
Afrena Azman on 1 Dec 2021
Understood sir, thank you so much for your help.

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yanqi liu
yanqi liu on 1 Dec 2021
yes,sir,may be use regionprops to get some properties,such as
then make judge rule to classify
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Afrena Azman
Afrena Azman on 1 Dec 2021
Noted that. I tried using the Classification Learner Apps and it works. Thank you so much

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