Passing raw binary image to Azure Cognitive Services API

I want to use Analyze Images API from Azure with raw Python requests passing binary image data rather than URL. I use the io module to get binary data from the image

with io.BytesIO() as output:
    tmp_imp.save(output, format="JPEG")
    contents = output.getvalue()

payload = {
    {'url': contents}
}

Then I pass it as 'url' to payload

response = requests.post(analyze_url, headers=headers, params=params, data=json.dumps(payload))

The error I receive indicates there's a JSON format error, but I don't understand how to fix it

{'error': {'code': 'InvalidArgument', 'innererror': {'code': 'BadArgument', 'message': 'JSON format error.'}, 'message': 'JSON format error.'}}

URLs work fine, but I want to use specifically binary image data without resorting to Azure Python packages.

Based on the scenario, I have reproduced the issue.

To solve this, you can directly pass the image data and change the content type in your code snippet.

Below is the updated script:

import  requests
import  io
def  analyze_image(image_data):
	analyze_url = "https://<endpoint>.cognitiveservices.azure.com/vision/v3.2/analyze"
	headers = {
		"Content-Type": "application/octet-stream",
		'Ocp-Apim-Subscription-Key': '<your-subscription-key>',
	
	params = {
	"visualFeatures": "Categories,Description,Color",
	}
	response = requests.post(analyze_url, headers=headers,params=params, data=image_data)
	return  response.json()
	
if  __name__ == '__main__':
	image_path = "OIP.jpg"
	with  open(image_path, "rb") as  image_file:
		image_data = image_file.read()
	result = analyze_image(image_data)
	print(result)

Updated Script successfully executed.

Output