Azure Face API using python

Hi Team,

Wish to know how to send local image URL to Azure face API. Please find my code below . I am receiving invalid URL error.

please do let me know at your earliest convenience.  Thanks in Advance.

Code

cam1 = cv2.VideoCapture(1)
while(True):
# Capture frame-by-frame
#ret0, frame0 = cam0.read()
ret1, frame1 = cam1.read()
cv2.imwrite("images/face1.png",frame1)
url = "https://rafaces.cognitiveservices.azure.com/face/v1.0/detect"

querystring = {"q": "requests+language:python","returnFaceAttributes":"age,gender,smile,emotion,glasses,noise","maxNumOfCandidatesReturned ":"Tru","maxNumOfCandidatesReturned%20":"Tru"}

payload = "{\r\n \"url\":\"images/face1.png\"\r\n}"
headers = {
'Content-Type': "application/json",
'Ocp-Apim-Subscription-Key': "7af27b63c4a94e80b8d5d045a6927cd6",
'User-Agent': "PostmanRuntime/7.19.0",
'Accept': "/",
'Cache-Control': "no-cache",
'Postman-Token': "44fbc05f-41ba-40dc-9c8a-72708fc93a3c,af17bcb2-4835-412e-b968-5437592c9fb1",
'Host': "rafaces.cognitiveservices.azure.com",
'Accept-Encoding': "gzip, deflate",
'Content-Length': "84",
'Connection': "keep-alive",
'cache-control': "no-cache"
}

response1 = requests.request("POST", url, data=payload, headers=headers, params=querystring)
json_response = response1.json()
print(json_response)
x = len(json_response)
print(x)
cv2.imshow('image0', frame1)
sleep(10)
if cv2.waitKey(1) & 0xFF == ord('q'):
break

Response

{'error': {'code': 'InvalidURL', 'message': 'Invalid image URL.'}}