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SIFT or SURF are not available from java in opencv3, using the standard opencv distribution.

if you build from src with the opencv_contrib repo , you can use

xfeatures2d.SURF = xfeatures2d.SURF.create();
xfeatures2d.SIFT = xfeatures2d.SIFT.create();

SIFT or SURF are not available from java in opencv3, using the standard opencv distribution.

if you build from src with the opencv_contrib repo , you can use

xfeatures2d.SURF = xfeatures2d.SURF.create();
xfeatures2d.SIFT = xfeatures2d.SIFT.create();

(nonetheless, there should have been a proper exception, like: OpenCV Error: Bad argument (Specified feature detector type is not supported.) in create )