Pattern Matching OpenCV

speedsignfinderActivity.java

                    // Pattern Matching (very Slow)
                    int match_method = Imgproc.TM_SQDIFF;

                    Bitmap mBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.speedlimit55);

                    //battHeight and battWidth should have the height and width of your bitmap...
                    Mat mBatt = new Mat(mBitmap.getHeight(), mBitmap.getWidth(), CvType.CV_8UC1);

                    Utils.bitmapToMat(mBitmap, mBatt);

                    // / Create the result matrix
                    int result_cols = mCameraFeed.cols() - mBatt.cols() + 1;
                    int result_rows = mCameraFeed.rows() - mBatt.rows() + 1;
                    Mat result = new Mat(result_rows, result_cols, CvType.CV_32FC1);

                            // / Do the Matching and Normalize
                            Imgproc.matchTemplate(mCameraFeed, mBatt, result, match_method);
                            Core.normalize(result, result, 0, 1, Core.NORM_MINMAX, -1, new Mat());

                            // / Localizing the best match with minMaxLoc
                            Core.MinMaxLocResult mmr = Core.minMaxLoc(result);

                            Point matchLoc;
                            if (match_method == Imgproc.TM_SQDIFF || match_method == Imgproc.TM_SQDIFF_NORMED) {
                                matchLoc = mmr.minLoc;
                            } else {
                                matchLoc = mmr.maxLoc;
                            }

                            // / Show me what you got
                            Core.rectangle(mCameraFeed, matchLoc, new Point(matchLoc.x + mBatt.cols(),
                                    matchLoc.y + mBatt.rows()), new Scalar(0, 255, 0));

                    //        // Save the visualized detection.
                    //        System.out.println("Writing "+ outFile);
                    //        Highgui.imwrite(outFile, img);