VuforiaLocalizer.CloseableFrame frame = vuforia.getFrameQueue().take(); //takes the frame at the head of the queue
long numImages = frame.getNumImages();

for (int i = 0; i < numImages; i++) {
    if (frame.getImage(i).getFormat() == PIXEL_FORMAT.RGB565) {
        rgb = frame.getImage(i);
        break;
    }
}

/*rgb is now the Image object that weve used in the video*/
Bitmap bm = Bitmap.createBitmap(rgb.getWidth(), rgb.getHeight(), Bitmap.Config.RGB_565);
bm.copyPixelsFromBuffer(rgb.getPixels());

//put the image into a MAT for OpenCV
Mat tmp = new Mat(rgb.getWidth(), rgb.getHeight(), CvType.CV_8UC4);
Utils.bitmapToMat(bm, tmp);

//close the frame, prevents memory leaks and crashing
frame.close();