title: Recognize vertical text using google cloud vision
body: <p>I'm trying to recognize vertical text using google cloud vision. Image example:
  <a href="https://i.stack.imgur.com/3wwYp.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3wwYp.jpg" alt="A B C D E"></a> </p>
  
  <p>I use Try This API on <a href="https://cloud.google.com/vision/docs/ocr" rel="nofollow noreferrer">https://cloud.google.com/vision/docs/ocr</a> to test the engine.</p>
  
  <p>Request body:</p>
  
  <pre><code>{
    "requests": [
      {
        "features": [
          {
            "type": "DOCUMENT_TEXT_DETECTION"
          }
        ],
        "image": {
          "source": {
            "imageUri": "https://i.stack.imgur.com/3wwYp.jpg"
          }
        }
      }
    ]
  }
  </code></pre>
  
  <p>The result is</p>
  
  <pre><code>{
    "responses": [
      {}
    ]
  }
  </code></pre>
  
  <p>Am I missing something? Thank you.</p>