CODEWITHSUNDEEP
image-processingopencv
Ricardo Cunha
Ricardo Cunha

Reputation: 2075

Opencv how to ignore small parts on image

I need a little help in Opencv, I´m a beginner and don´t know all functions yet. I´m trying to do an OCR in my licence plate, it´s an Brazilian plate. So after some image processing like cvCvtColor,cvCanny,cvFindContours and cvDrawContours, I get images like this:

Plate

It´s a fake image, I mounted this image because I don´t want to publish my real plate on the web. On my real image, there is only black and white color I painted some parts on this example because I want ignore this parts. Red color it´s a city name, yellow color is a hyphen separator and green color is the hole to fix the plate on car. I need to know if there is a way to ignore this small parts and recognize only big parts, so after this filter i can do my OCR processing. Any help?

Upvotes: 1

Views: 1371

Answers (1)

ArtemStorozhuk
ArtemStorozhuk

Reputation: 8725

I'm not sure if it helps you in other situations but in this situation you can remove small contours using erosion or simply using contourArea for calculating contour's area (and remove contour if it's area is too small).

Upvotes: 2

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