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Blind Watermark

Last updated: 2022-07-12 11:47:01

    Overview

    This document provides an overview of APIs and SDK code samples for blind watermarking.

    For blind watermark APIs, see Blind Watermarking.

    Adding Blind Watermark

    Feature description

    You can add a blind watermark when uploading or downloading an object.

    Sample 1: Adding a blind watermark during upload

    const filePath = "temp-file-to-upload" // Local file path
    cos.putObject({
     Bucket: 'examplebucket-1250000000',
     Region: 'COS_REGION',
     Key: 'exampleobject',
     Body: fs.createReadStream(filePath), // Uploaded file object
     Headers: {
      // CI's persistent processing API during upload
      'Pic-Operations': '{"is_pic_info": 1, "rules": [{"fileid": "desample_photo.jpg", "rule": "watermark/3/type/1/image/aHR0cDovL2V4YW1wbGVzLTEyNTEwMDAwMDQucGljc2gubXlxY2xvdWQuY29tL3NodWl5aW4uanBn"}]}'
    },
    }, function(err, data) {
     console.log(err || data);
    });
    

    Sample 2: Adding a blind watermark during download

    cos.getObject({
      Bucket: 'examplebucket-1250000000',
      Region: 'COS_REGION',
      Key: 'exampleobject',
      QueryString: 'watermark/3/type/1/image/aHR0cDovL2V4YW1wbGVzLTEyNTEwMDAwMDQucGljc2gubXlxY2xvdWQuY29tL3NodWl5aW4uanBn',
    }, function (err, data) {
     console.log(err || data);
     fs.writeFileSync('filepath', data.Body);  // Save the image locally
    });
    
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