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How to detect a specific area on image
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![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/287121/image.png)
How to detect the blue are only without white area and numbers?
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darova
2020년 4월 25일
- binarize image
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/287359/image.png)
- remove small object like numers (bwareaopen)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/287360/image.png)
- use find to get indices of corners you want
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/287361/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/287362/image.png)
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