OpenCV 3.0.0-beta 缺少 KNN？

Question

刚从opencv-2.4.11升级，KNearest好像不见了

In [27]: import cv2
In [28]: print(cv2.__version__)
3.0.0-beta

In [29]: cv2.KNearest()

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-29-d2ea29abad59> in <module>()
----> 1 cv2.KNearest()

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

In [30]: cv2.K
cv2.KAZE_DIFF_CHARBONNIER      cv2.KAZE_DIFF_WEICKERT         cv2.KMEANS_RANDOM_CENTERS      cv2.KeyPoint
cv2.KAZE_DIFF_PM_G1            cv2.KAZE_create                cv2.KMEANS_USE_INITIAL_LABELS  cv2.KeyPoint_convert
cv2.KAZE_DIFF_PM_G2            cv2.KMEANS_PP_CENTERS          cv2.KalmanFilter               cv2.KeyPoint_overlap

Answer 1

许多模块已从 OpenCV 核心中删除并标记为非自由。这些模块有单独的存储库，必须单独构建。

存储库在这里https://github.com/itseez/opencv_contrib/

信息是在这个答案中找到的

Answer 2

实际上，KNearest在opencv3中已经被移动到模块cv2.ml，你必须调用cv2.ml.KNearest_create()才能使用knn。

In [1]: import cv2

In [2]: cv2.__version__
Out[2]: '3.0.0'

In [3]: cv2.ml.KNea
cv2.ml.KNearest_BRUTE_FORCE  cv2.ml.KNearest_create   cv2.ml.KNearest_KDTREE

In [3]: cv2.ml.KNearest_create

详情请运行help(cv2.ml.KNearest_create()).

尽情享受吧:)

OpenCV 3.0.0-beta 缺少 KNN？

OpenCV 3.0.0-beta missing KNN?

knn

python-2.7

opencv3.0