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POHow to store extracted fearure points from imageframes in SQLlite (Android)
 

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  1. POHow to store extracted fearure points from imageframes in SQLlite (Android)
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    <p>How do i store the extracted feature points from an imageframe in SQLlite database in android ?. I am able to detect and extract feature points successfully in NDK using C++, now i want to store these feature points and later use it for comparison with feature points detected in camera.</p> <p>Here is the sample code i plan to work on</p> <pre><code>JNIEXPORT void JNICALLJava_org_opencv_samples_tutorial2_Tutorial2Activity_FindFeatures(JNIEnv*, jobject, jlong addrGray, jlong addrRgba) { Mat&amp; mGr = *(Mat*)addrGray; Mat&amp; mRgb = *(Mat*)addrRgba; cv::Mat descriptor; vector&lt;KeyPoint&gt; v; cv::OrbFeatureDetector detector; cv::OrbDescriptorExtractor extractor; detector.detect(mGr, v); extractor.compute(mGr,v,descriptor); { // code for storing the feature points } } Java_org_opencv_samples_tutorial2_Tutorial2Activity_MatchFeatures(JNIEnv*, jobject, jlong addrGray, jlong addrRgba) { Mat&amp; mGr = *(Mat*)addrGray; Mat&amp; mRgb = *(Mat*)addrRgba; cv::Mat descriptor; vector&lt;KeyPoint&gt; v1; cv::OrbFeatureDetector detector1; cv::OrbDescriptorExtractor extractor1; detector1.detect(mGr, v1); extractor1.compute(mGr,v1,descriptor1); { // code for fetching the feature points from database } cv::BFMatcher matcher1; std::vector&lt;cv::DMatch&gt; matches; matcher1.match({descriptor extracted from database},descriptor1,matches); // here comes code for finding good matches by ratio test and Homograpgy } </code></pre> <p>Can somebody please explain how store and extract feature points from database in android.</p>
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