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What is the difference between Fast_Type_7_12 and Fast_Type_9_16?

asked 2017-04-27 08:42:41 -0500

My understanding is that Fast_Type_9_16 means that a circle of 16 points is selected around the current pixel and at least 9 continuous points in this need to be lighter or darker than current pixel for current pixel to be detected as a corner. is this correct? If this is correct, is there any way of changing 9 to some other value e.g. 10 or 12?

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answered 2017-04-27 11:03:41 -0500

Eduardo gravatar image

updated 2017-04-27 11:08:05 -0500

Yes I think it is that. You should refer to the original paper:

For changing the FAST type in OpenCV 3 (doc):

cv::Ptr<cv::Feature2D> fast = cv::FastFeatureDetector::create(10, true, cv::FastFeatureDetector::TYPE_5_8);
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Thanks for the pointers!!

neela112 gravatar imageneela112 ( 2017-05-02 01:59:12 -0500 )edit
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Asked: 2017-04-27 08:42:41 -0500

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Last updated: Apr 27 '17