I Don't get the expected result when calling ocr api from computer visio

I'm trying to use the ocr method from computer visio to extract all the text from a specific image. Nevertheless it doesn't return the info I know which is there, because when I analize the image directly in the available option in this page https://azure.microsoft.com/es-es/services/cognitive-services/computer-vision/, it does return the data.

This is the image im traying to get the data from https://bitbucket.org/miguel_acevedo_ve/python-stream/raw/086279ad6885a490e521785ba288914ed98cfd1d/test.jpg

I have followed all the python tutorial available in the azure documentation site.

import matplotlib.pyplot as plt
from matplotlib.patches import Rectangle
from PIL import Image
from io import BytesIO

subscription_key = "<Subscription Key>"

assert subscription_key

vision_base_url = "https://westcentralus.api.cognitive.microsoft.com/vision/v2.0/"

ocr_url = vision_base_url + "ocr"

image_url = "https://bitbucket.org/miguel_acevedo_ve/python-stream/raw/086279ad6885a490e521785ba288914ed98cfd1d/test.jpg"

'''image_url = "https://upload.wikimedia.org/wikipedia/commons/thumb/a/af/" + \
    "Atomist_quote_from_Democritus.png/338px-Atomist_quote_from_Democritus.png"
'''

headers = {'Ocp-Apim-Subscription-Key': subscription_key}
params  = {'mode' : 'Printed'}
data    = {'url': image_url}
response = requests.post(ocr_url, headers=headers, params=params, json=data)
response.raise_for_status()

analysis = response.json()
print(analysis)

and this is my current output:

{u'regions': [], u'textAngle': 0.0, u'orientation': u'NotDetected', u'language': u'unk'}

UPDATE: The solution is to use recognizeText not the ocr function from computer visio.

The solution is to use the recognizeText method and not the ocr method from computer vision.

First you need to send a post and then with the operationid make a get request to obtain de results.

vision_base_url = "https://westeurope.api.cognitive.microsoft.com/vision/v2.0/"

ocr_url = vision_base_url + "recognizeText"

response = requests.post(
    ocr_url, headers=headers,params=params, data=imgByteArr)
operationLocation = response.headers['Operation-Location']
response = requests.request('GET', operationLocation, json=None, data=None, headers=headers, params=None)