title: Get Frame when detecting text using a pipeline in Android Mobile Vision
body: <p>I am detecting text using a pipeline just like the <a href="https://github.com/googlesamples/android-vision/tree/master/visionSamples/ocr-reader" rel="nofollow">Google CodeLabs sample code</a>.  How do I get the preview Frame that the CameraSource sends to the TextRecognizer?</p>