如何使用 python 查询 Google Cloud Vision API 与本地图像？

Question

我想使用本地存储的图像向 Google 视觉 API 发送请求。我正在遵循“Python Client for Google Cloud Vision¶”指南，特别是 "Annotage an Image" 下的代码示例。为了构建我的请求，我遵循“Base64 Encoding”中的示例。

这是我写的代码：

from google.cloud.vision import ImageAnnotatorClient
import os
import base64
os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = 'keys/sc_google.json'

def encode_image(image_path):
    with open(image_path, "rb") as f:
        image_content = f.read()
        return base64.b64encode(image_content)

client = ImageAnnotatorClient()
image_path = 'images/happy_baby3.png'
query = {
    "requests": [
        {
            "image": {
                "content": encode_image(image_path)
            },
            "features": [
                {
                    "type": "FACE_DETECTION",
                    "maxResults": 10
                }
            ]
        }
    ]
}
response = client.annotate_image(query)
print(response.annotations)

仍然运行我收到以下错误消息的代码：

Traceback (most recent call last):
  File "/mnt/c/Users/nomis/PycharmProjects/hello_web_app/emotion_detection.py", line 29, in <module>
    response = client.annotate_image(query)
  File "/usr/local/lib/python3.6/dist-packages/google/cloud/vision_helpers/__init__.py", line 55, in annotate_image
    image = protobuf.get(request, "image")
  File "/usr/local/lib/python3.6/dist-packages/google/api_core/protobuf_helpers.py", line 192, in get
    raise KeyError(key)
KeyError: 'image'

我也试过 this Example 但出现错误“在 'types.py' 中找不到引用 'Image'。

你能解释一下我做错了什么，并提供一个最小的工作示例来说明如何使用本地图像查询 Google Vision API 吗？

Answer 1

在您链接的示例中，没有请求数组。试试这个：

query = {
            "image": {
                "content": encode_image(image_path)
            },
            "features": [
                {
                    "type": "FACE_DETECTION",
                    "maxResults": 10
                }
            ]
}

如何使用 python 查询 Google Cloud Vision API 与本地图像？

How to Query the Google Cloud Vision API with a local image using python?

python

google-cloud-platform

google-cloud-vision

google-vision