相关疑难解决方法(0)

我在OpenCV android 2.4.11的例子下工作,它使用相机检测面部.我没有在找到的脸上画一个矩形,而是试图在脸上放一个面具(png图像).但是为了在脸上显示图像,png图像带有透明度的黑色背景.

FdActivity.java

public void onCameraViewStarted(int width, int height) {
        mGray = new Mat();
        mRgba = new Mat();

        //Load my mask png
        Bitmap image = BitmapFactory.decodeResource(getResources(), R.drawable.mask_1);

        mask = new Mat();

        Utils.bitmapToMat(image, mask);

}

public Mat onCameraFrame(CvCameraViewFrame inputFrame) {

        mRgba = inputFrame.rgba();
        mGray = inputFrame.gray();

        if (mAbsoluteFaceSize == 0) {
            int height = mGray.rows();
            if (Math.round(height * mRelativeFaceSize) > 0) {
                mAbsoluteFaceSize = Math.round(height * mRelativeFaceSize);
            }
            mNativeDetector.setMinFaceSize(mAbsoluteFaceSize);
        }

        MatOfRect faces = new MatOfRect();

        if (mDetectorType == JAVA_DETECTOR) { …