Multi tool use

OpenCV 3.4.1: KNearest function not found

I can see from the OpenCV 3.4.1 documentation (https://docs.opencv.org/3.4.1/dd/de1/classcv_1_1ml_1_1KNearest.html) that the KNearest function exists. This is exactly my version, as you can see below:

>>> import cv2
>>> cv2.__version__
'3.4.1'


However, when I run my python code it seems that it doesn't exist

knn = cv2.KNearest()
AttributeError: 'module' object has no attribute 'KNearest'


I am quite rookie on this. What have I missed? is this the correct function for such an OpenCV version?

1 Answer
1

Your usage is for the 2.x version

knn = cv2.KNearest() # OpenCv 2.x


Try this instead:

knn = cv2.ml.KNearest_create() # OpenCv 3.x


Read this python example from the documentation

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