How to find the contour which is nearest to the center of image?

Asked Mar 28 '19 at 08:58

Active Aug 23 '22 at 11:29

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How to find the contour that is nearest to the center of image?

For example in the image below, I have used cv::findContours() to find two contours of an image(please ignore the 5pixel part as I have used this image in another SO post), is it possible to locate the contour index of the red contour which is nearest to the center of image?

Imgur

I currently used cv::pointPolygonTest and loop the contours with the coordinate of the center of image to find the distance between every contours and center, it feel inefficient, is there any opencv function I can use?

edited Aug 23 '22 at 11:29

Jeru Luke

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asked Mar 28 '19 at 08:58

Komgcn

Where is the center of the image? – Bahramdun Adil Mar 28 '19 at 09:26
@BahramdunAdil I have edited the image, the black dot is the center of image – Komgcn Mar 29 '19 at 01:48
Inside the image where is the contour and what do you mean by 5pixel? In your image, the contour already is in the center. – Bahramdun Adil Mar 29 '19 at 01:54
@BahramdunAdil Ignore the 5 pixel. The red line and the black line are the two contours I found using findContours(). How can I get the index of the red contour? – Komgcn Mar 29 '19 at 06:17

How to find the contour which is nearest to the center of image?

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