CardValidationActivity.java 文件源码

/**
 * Checks if the pattern can be found in the given area of interest and sets up feedback.
 * @param match_method Match Methods supported by OpenCV.
 * @param res ID of the resource pattern in the res directory.
 * @param resName Name of the resource to be returned.
 * @param thresh Threshold the best detection has to pass in order to be a successful detection.
 */
public void templateMatching(int match_method, int res, String resName, double thresh) {
    // Pattern Matching
    Point matchLocCode; double matchValCode;
    Log.i("HERE", "" + resName);
    Rect roiCodeArea = new Rect(new Point(showBit.cols() * card.getPattern(resName).getTl().x,showBit.rows() * card.getPattern(resName).getTl().y), new Point(showBit.cols() * card.getPattern(resName).getBr().x, showBit.rows() * card.getPattern(resName).getBr().y));
    Mat cropedCodeArea = showBit.submat(roiCodeArea); 
    Bitmap bmCode = BitmapFactory.decodeResource(getResources(), res);
    Mat cropedCode = new Mat ( bmCode.getHeight(), bmCode.getWidth(), CvType.CV_8U, new Scalar(4));
    Utils.bitmapToMat(bmCode, cropedCode);

    int result_cols_code = cropedCodeArea.cols() - cropedCode.cols() + 1;
    int result_rows_code = cropedCodeArea.rows() - cropedCode.rows() + 1;
    Mat resultCode = new Mat(result_rows_code, result_cols_code, CvType.CV_32FC1);

    Imgproc.matchTemplate(cropedCodeArea, cropedCode, resultCode, match_method);
    MinMaxLocResult mmrCode = Core.minMaxLoc(resultCode);

    if (match_method == Imgproc.TM_SQDIFF || match_method == Imgproc.TM_SQDIFF_NORMED) {
        matchLocCode = mmrCode.minLoc;
        matchValCode = mmrCode.minVal;
    } else {
        matchLocCode = mmrCode.maxLoc;
        matchValCode = mmrCode.maxVal;
    }
    Log.w("matchValCode", "" + matchValCode);
    // Pattern passes Detection
    if(matchValCode >= thresh) {
        // If detecting card and pattern passes: get the card that pattern belongs to.
        if(cardType.equals("-DETECT-")) {
            cardType = getFoundCard(resName);
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    Toast.makeText(
                            CardValidationActivity.this,
                            "Card detected: " + cardType,
                            Toast.LENGTH_LONG
                            ).show();
                }
            });
        }
        else {
            Core.rectangle( cropedCodeArea, matchLocCode, new Point( matchLocCode.x + cropedCode.cols() , matchLocCode.y + cropedCode.rows() ), new Scalar(0, 255, 0, 255), 4 );
            theText.put("Pattern: " + resName, "PASSED");
        }
    }
    else {
        theText.put("Pattern: " + resName, "FAILED");
        failureCount++;
    }
}