challenging case on checkbox crossing outside box

karolzak / boxdetect

BoxDetect is a Python package based on OpenCV which allows you to easily detect rectangular shapes like character or checkbox boxes on scanned forms.

MIT License

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challenging case on checkbox crossing outside box #17

Closed robbiedood closed 3 years ago

robbiedood commented 3 years ago

Dear Boxdetect friends and the author Karolzak,

My image is as shown attached, checked X crossing a little bit outside the box. So far we can not detect any checkbox, tried different configs. Hope to hear your expertise on the challenging case. boxdetect_failcase

Best, --Luke

karolzak commented 3 years ago

Hey @lukelu0520 Just by looking at the example you shared, seems like BoxDetect should handle that with a correct config. Is that image you share an actual document you're using as an input for BoxDetect or are you using a bigger image/doc? Can you share an example of a full size doc that you're using?

robbiedood commented 3 years ago

Hi @karolzak , I am grateful to get your response. Yes, the image is what we are using as an input for BoxDetect.

The latest update: after reading your source code (very neat coding & comprehensive comments!), we figured out that setting morph_kernels_type = 'rectangles' could solve the problem. 'rectangles' type takes longer processing but it works !

Thanks for creating BoxDetect ! --Luke