asked 2015-03-25 00:49:39 -0600
updated 2015-03-26 13:14:38 -0600
how can i detect black shape in the mid?
which way i follow ?
Not quite sure what you mean by this question, are you wanting to detect that black shape in the middle? And do you mean detecting shapes that aren't quite circular?
i want to need detect black shape in the middle which way to follow ?
if it is all the time black as it appears in the picture, then colour segmentation is the simplest way to go.
Look at this tutorial.
I think in this case cv::threshold, cv::findContours and cv::fitEllipse is your friend.
cv::threshold
cv::findContours
cv::fitEllipse
For choosing right contours use cv::areaContour and cv::arcLength to get circularity for example.
cv::areaContour
cv::arcLength
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Asked: 2015-03-25 00:49:39 -0600
Seen: 144 times
Last updated: Mar 26 '15
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Not quite sure what you mean by this question, are you wanting to detect that black shape in the middle? And do you mean detecting shapes that aren't quite circular?
i want to need detect black shape in the middle which way to follow ?
if it is all the time black as it appears in the picture, then colour segmentation is the simplest way to go.
Look at this tutorial.
I think in this case
cv::threshold
,cv::findContours
andcv::fitEllipse
is your friend.For choosing right contours use
cv::areaContour
andcv::arcLength
to get circularity for example.