Knearest compatibility error (OpenCV 3.1)

[franktoffel]

Again, some errors due to a series of refactoring operations made in the latest versions:

Ejemplo 22, line 25,26 and 27 crash:

knn = cv2.KNearest() # error
knn.train(trainData, responses)  # error
ret, results, neighbours, dist = knn.find_nearest(newcomer, k)  # error


---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-8-cfe065aacd5a> in <module>()
     23 # Classification
     24 k = 5
---> 25 knn = cv2.KNearest()
     26 knn.train(trainData, responses)
     27 ret, results, neighbours, dist = knn.find_nearest(newcomer, k)

AttributeError: module 'cv2' has no attribute 'KNearest'

This version works:

knn = cv2.ml.KNearest_create()
knn.train(trainData,cv2.ml.ROW_SAMPLE,responses)
ret, results, neighbours, dist = knn.findNearest(newcomer, k)

+info:
http://stackoverflow.com/a/30950853
http://stackoverflow.com/a/32990528
http://stackoverflow.com/a/34247966

[rcrespocano]

Fixed error.

Thank you so much.

[aj-amitjain]

It worked. Thanks

[Tulsi97]

it's working,thanks

[SUNILARAVA]

The below code worked for me also...

knn = cv2.ml.KNearest_create()
knn.train(trainData,cv2.ml.ROW_SAMPLE,responses)
ret, results, neighbours, dist = knn.findNearest(newcomer, k)