网页检测

对文件、网址或 Cloud Storage URI 执行 Web 检测。

包含此代码示例的文档页面

如需查看上下文中使用的代码示例,请参阅以下文档:

代码示例

Python

在试用此示例之前,请按照Vision 快速入门:使用客户端库中的 Python 设置说明进行操作。 如需了解详情,请参阅 Vision Python API 参考文档

import argparse
import io

from google.cloud import vision

def annotate(path):
    """Returns web annotations given the path to an image."""
    client = vision.ImageAnnotatorClient()

    if path.startswith('http') or path.startswith('gs:'):
        image = vision.Image()
        image.source.image_uri = path

    else:
        with io.open(path, 'rb') as image_file:
            content = image_file.read()

        image = vision.Image(content=content)

    web_detection = client.web_detection(image=image).web_detection

    return web_detection

def report(annotations):
    """Prints detected features in the provided web annotations."""
    if annotations.pages_with_matching_images:
        print('\n{} Pages with matching images retrieved'.format(
            len(annotations.pages_with_matching_images)))

        for page in annotations.pages_with_matching_images:
            print('Url   : {}'.format(page.url))

    if annotations.full_matching_images:
        print('\n{} Full Matches found: '.format(
              len(annotations.full_matching_images)))

        for image in annotations.full_matching_images:
            print('Url  : {}'.format(image.url))

    if annotations.partial_matching_images:
        print('\n{} Partial Matches found: '.format(
              len(annotations.partial_matching_images)))

        for image in annotations.partial_matching_images:
            print('Url  : {}'.format(image.url))

    if annotations.web_entities:
        print('\n{} Web entities found: '.format(
              len(annotations.web_entities)))

        for entity in annotations.web_entities:
            print('Score      : {}'.format(entity.score))
            print('Description: {}'.format(entity.description))

if __name__ == '__main__':
    parser = argparse.ArgumentParser(
        description=__doc__,
        formatter_class=argparse.RawDescriptionHelpFormatter)
    path_help = str('The image to detect, can be web URI, '
                    'Google Cloud Storage, or path to local file.')
    parser.add_argument('image_url', help=path_help)
    args = parser.parse_args()

    report(annotate(args.image_url))

后续步骤

如需搜索和过滤其他 Google Cloud 产品的代码示例,请参阅 Google Cloud 示例浏览器