问题
I'm running the following openCV code in Android:
FeatureDetector detector = FeatureDetector.create(FeatureDetector.ORB);
DescriptorExtractor descriptor = DescriptorExtractor.create(DescriptorExtractor.ORB);
DescriptorMatcher matcher = DescriptorMatcher.create(DescriptorMatcher.BRUTEFORCE_HAMMING);
It works fine in openCV 2.4.1 In openCV 3.2 I'm getting the following exception:
java.lang.UnsatisfiedLinkError: No implementation found for long org.opencv.features2d.DescriptorMatcher.create_1(int) (tried Java_org_opencv_features2d_DescriptorMatcher_create_11 and Java_org_opencv_features2d_DescriptorMatcher_create_11__I)
at org.opencv.features2d.DescriptorMatcher.create_1(Native Method)
at org.opencv.features2d.DescriptorMatcher.create(DescriptorMatcher.java:76)
I checked it on 2 different Android devices. Am I doing something wrong or is this a bug in the new openCV version?
回答1:
Your code is right, i've tried it on my OpenCV 3.1 project and it's working flawlessly. I don't know about OpenCV 3.2 but it should be the same. Have you tried to enter the corresponding int value of your matcher ?
DescriptorMatcher matcher = DescriptorMatcher.create(4);
You can find the corresponding Int values here DescriptorMatcher OpenCV 3.2. It looks like DescriptorMatcher.BRUTEFORCE_HAMMING is considered as a long insted of int.
回答2:
There is currently a problem with the OpenCV Manager on Google Play. I doesn't support version 3.2 yet. To overcome the problem I copied the libs directory (sdk\native\libs) from the SDK to src/main/jniLibs of my application. Please note that I'm using Android Studio. In Eclipse it supposed to be located under the root of the app. see: Error while loading Native Library in Android
来源：https://stackoverflow.com/questions/41788433/unable-to-create-descriptormatcher-in-opencv-3-2-android