Source Code : Implement image comparison using openCV in android [closed]

Implement image comparison using openCV in android [closed]

<code>privateBaseLoaderCallback  mLoaderCallback =newBaseLoaderCallback(this)</code>

I have added these code

<code>FeatureDetector detector =FeatureDetector.create(FeatureDetector.ORB);<br>  DescriptorExtractor descriptor =DescriptorExtractor.create(DescriptorExtractor.ORB);;<br>  DescriptorMatcher matcher =DescriptorMatcher.create(DescriptorMatcher.BRUTEFORCE_HAMMING);<br><br>  //first image<br>  Mat img1 =Highgui.imread("/mnt/sdcard/gta1.jpg");<br>  Mat descriptors1 =newMat();<br>  MatOfKeyPoint keypoints1 =newMatOfKeyPoint();<br><br><br>  detector.detect(img1, keypoints1);<br>  descriptor.compute(img1, keypoints1, descriptors1);<br><br>  //second image<br>  Mat img2 =Highgui.imread("/mnt/sdcard/gta1.jpg");<br>  Mat descriptors2 =newMat();<br>  MatOfKeyPoint keypoints2 =newMatOfKeyPoint();<br><br>  detector.detect(img2, keypoints2);<br>  descriptor.compute(img2, keypoints2, descriptors2);<br><br>  //matcher should include 2 different image's descriptors<br>  MatOfDMatch  matches =newMatOfDMatch();  <br>  matcher.match(descriptors1,descriptors2,matches);<br>  Log.d(TAG,"size "+ matches.size());<br><br>  //feature and connection colors<br>  Scalar RED =newScalar(255,0,0);<br>  Scalar GREEN =newScalar(0,255,0);<br>  //output image<br>  Mat outputImg =newMat();<br>  MatOfByte drawnMatches =newMatOfByte();<br>  //this will draw all matches, works fine<br>  Features2d.drawMatches(img1, keypoints1, img2, keypoints2, matches, <br>  outputImg, GREEN, RED,  drawnMatches, Features2d.NOT_DRAW_SINGLE_POINTS);<br><br>  Bitmap imageMatched =Bitmap.createBitmap(outputImg.cols(), outputImg.rows(),Bitmap.Config.RGB_565);//need to save bitmap<br>  Utils.matToBitmap(outputImg, imageMatched);<br>  Log.d(TAG,"Match "+ imageMatched);</code>

after the line of code

<code>mNativeDetector =newDetectionBasedTracker(mCascadeFile.getAbsolutePath(),0);</code>

But i get exception of

<code>java.lang.IllegalArgumentException: width and height must be >0</code>

and if i hard-code the height and width insread of using outputImg.cols(), outputImg.rows() i get a cv::error of

<code>OpenCVError:Assertion failed (src.dims ==2&& info.height ==(uint32_t)src.rows && info.width ==(uint32_t)src.cols)invoid Java_org_opencv_android_Utils_nMatToBitmap2(JNIEnv*, jclass, jlong, jobject, jboolean), file /home/reports/ci/slave_desktop/50-SDK/opencv/modules/java/generator/src/cpp/utils.cpp</code>