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I'm trying to instantiate a SURF object in python using OpenCV as described here but this happens:
>>> import cv2
>>> cv2.__version__
'2.4.0'
>>> cv2.SURF()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'SURF'
Does anyone know why this happens or if SURF is missing from the Python version of OpenCV?
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To get access to the original SIFT and SURF implementations found in OpenCV 2.4. X, you'll need to pull down both the opencv and opencv_contrib repositories from GitHub and then compile and install OpenCV 3 from source.
Checking your OpenCV version: a real-world example X and OpenCV 3 to detect the contours (i.e. outlines) of the Tetris blocks. As you can see, all we need to do is make a call to is_cv2 , is_cv4 , and is_cv3 and then wrap our version specific code inside the if statement blocks — that's it!
It is a regression which should be fixed in the next library update.
But SURF is not really absent. You still can access it via the generic wrappers:
surf_detector = cv2.FeatureDetector_create("SURF")
surf_descriptor = cv2.DescriptorExtractor_create("SURF")
Update: cv2.SURF() is restored in OpenCV 2.4.1
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