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Blind Watermark

Last updated: 2024-02-05 11:04:02

    Overview

    This document provides an overview of APIs and SDK code samples for blind watermarking.
    API
    Description
    Blind watermarking
    Adds blind watermark to or extracts blind watermark from local image and uploads it to bucket

    Blind Watermark

    Feature description

    Blind watermark is a new type of watermark based on CI.

    Method prototype

    def ci_put_object_from_local_file(self, Bucket, LocalFilePath, Key, EnableMD5=False, **kwargs)

    Sample request

    # Add a blind watermark
    watermark_url = 'http://{bucket}.cos.{region}.myqcloud.com/watermark.png'.format(bucket='examplebucket-1250000000', region=region)
    watermark_url_base64 = bytes.decode(base64.b64encode(str.encode(watermark_url)))
    print(watermark_url_base64)
    response, data = client.ci_put_object_from_local_file(
    Bucket='examplebucket-1250000000',
    LocalFilePath='sample.png',
    Key="sample.png",
    # pic operation json struct
    PicOperations='{"is_pic_info":1,"rules":[{"fileid": "format.png","rule": "watermark/3/type/1/image/' +
    watermark_url_base64 + '" }]}'
    )
    
    # Extract a blind watermark
    sample_url = 'http://{bucket}.cos.{region}.myqcloud.com/sample.png'.format(bucket='examplebucket-1250000000', region=region)
    sample_url_base64 = bytes.decode(base64.b64encode(str.encode(sample_url)))
    response, data = client.ci_put_object_from_local_file(
    Bucket='examplebucket-1250000000',
    LocalFilePath='format.png',
    Key="format.png",
    # pic operation json struct
    PicOperations='{"is_pic_info":1,"rules":[{"fileid": "watermark.png","rule": "watermark/4/type/1/image/' +
    sample_url_base64 + '" }]}'
    )

    Parameter description

    Parameter
    Description
    Type
    Required
    Bucket
    Bucket name in the format of BucketName-APPID. For more information, see Bucket Overview.
    String
    Yes
    LocalFilePath
    Path of the local image to be processed
    String
    Yes
    Key
    Object key. It can contain up to 128 bytes of letters, digits, spaces, plus signs, minus signs, underscores, equal signs, dots, colons, and slashes.
    String
    Yes
    EnableMD5
    Enables MD5 check for uploaded objects
    Bool
    No

    Response description

    This API returns the response header and body.
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