tencent cloud

PrevNext

masukan

cari berdasarkan kata kunci

Recent Pages

Dokumentasi
Cloud Object Storage
    Dokumentasi
    Download PDF

    Hybrid Watermarking

    Terakhir diperbarui:2024-03-25 15:11:19
    Unduh PDF

      Overview

      The basic image processing feature of CI enables you to add an image or text watermark to images. However, in actual business scenarios, an image may contain both a fixed logo watermark and a dynamically changing text watermark (username). For such scenarios, the following integration methods are provided. You can select an appropriate one based on your actual business scenario.

      Method Comparison

      Method
      Pros
      Cons
      1
      It is easy to integrate and implement.
      The watermark size cannot change dynamically with the image size or tiled.
      2
      It can better fit the image when the image size changes frequently.
      It is difficult to integrate and is charged processing fees twice.

      How to Use

      Method 1. Using a pipeline operator to add two types of watermarks with only one URL

      The basic image processing feature of CI allows you to use pipeline operators "|" to process an image multiple times with only one request at a one-time charge of processing and traffic fees. This method greatly reduces the latency and additional fees caused by repeated requests.

      Directions

      1. Define the image watermark parameters as instructed in Image Watermarking. If you are unfamiliar with API parameters, you can add a style in the console to generate parameters as instructed in Basic Processing.
      Below are the processing parameters:
      watermark/1/image/aHR0cDovL2V4YW1wbGVzLTEyNTgxMjU2MzguY29zLmFwLWd1YW5nemhvdS5teXFjbG91ZC5jb20vbG9nby5wbmc/dissolve/60/dx/10/dy/50/gravity/southeast
      Note:
      Here, aHR0cDovL2V4YW1wbGVzLTEyNTgxMjU2MzguY29zLmFwLWd1YW5nemhvdS5teXFjbG91ZC5jb20vbG9nby5wbmc is the URL-safe Base64-encoded URL of the image watermark (image stored in the COS bucket).
      2. Define the text watermark parameters as instructed in Text Watermarking. If you are unfamiliar with API parameters, you can add a style in the console to generate parameters as instructed in Basic Processing.
      watermark/2/text/VUlOOiAxMjM0NTY3OA/font/SGVsdmV0aWNhLmRmb250/fontsize/36/fill/IzAwMDAwMA/dissolve/50/gravity/southeast/dx/10/dy/10
      Note:
      Here, VUlOOiAxMjM0NTY3OA is the URL-safe Base64-encoded text of UIN: 12345678.
      3. Use a pipeline operator to concatenate image and text watermark parameters:
      watermark/2/text/VUlOOiAxMjM0NTY3OA/font/SGVsdmV0aWNhLmRmb250/fontsize/36/fill/IzAwMDAwMA/dissolve/50/gravity/southeast/dx/10/dy/10|watermark/1/image/aHR0cDovL2V4YW1wbGVzLTEyNTgxMjU2MzguY29zLmFwLWd1YW5nemhvdS5teXFjbG91ZC5jb20vbG9nby5wbmc/gravity/southeast/dx/10/dy/50/dissolve/60
      4. Add the concatenated parameters to the end of the image download URL:
      https://examples-1258125638.cos.ap-guangzhou.myqcloud.com/preview.png?watermark/2/text/VUlOOiAxMjM0NTY3OA/font/SGVsdmV0aWNhLmRmb250/fontsize/36/fill/IzAwMDAwMA/dissolve/50/gravity/southeast/dx/10/dy/10|watermark/1/image/aHR0cDovL2V4YW1wbGVzLTEyNTgxMjU2MzguY29zLmFwLWd1YW5nemhvdS5teXFjbG91ZC5jb20vbG9nby5wbmc/gravity/southeast/dx/10/dy/50/dissolve/60
      To shorten the URL, you can add the part of the image watermark (unchanged) as the watermark1 style in the console as instructed in Basic Processing.
      In this way, the URL can be shortened to:
      https://examples-1258125638.cos.ap-guangzhou.myqcloud.com/preview.png/watermark1?watermark/2/text/VUlOOiAxMjM0NTY3OA/font/SGVsdmV0aWNhLmRmb250/fontsize/36/fill/IzAwMDAwMA/dissolve/50/gravity/southeast/dx/10/dy/10
      If you need to change the text content later, you only need to replace VUlOOiAxMjM0NTY3OA in the URL with the updated Base64 code; for example, UIN: 88888888 is encoded into VUlOOiA4ODg4ODg4OA, so you only need to change the URL to the following content to replace the text:
      https://examples-1258125638.cos.ap-guangzhou.myqcloud.com/preview.png/watermark1?watermark/2/text/VUlOOiA4ODg4ODg4OA/font/SGVsdmV0aWNhLmRmb250/fontsize/36/fill/IzAwMDAwMA/dissolve/50/gravity/southeast/dx/10/dy/10

      Method 2. Printing the text and image watermarks onto a transparent image and using the output image as the final image watermark

      1. Upload a 400x400 px transparent PNG image to the bucket as instructed in File Management. For example: https://examples-1258125638.cos.ap-guangzhou.myqcloud.com/transparent.png
      2. Generate and concatenate image and text watermark parameters as instructed in steps 1–3 of method 1.
      3. Add the concatenated parameters at the end of the download URL of the transparent PNG image:
      https://examples-1258125638.cos.ap-guangzhou.myqcloud.com/transparent.png?watermark/2/text/VUlOOiAxMjM0NTY/font/SGVsdmV0aWNhLmRmb250/fontsize/48/fill/IzAwMDAwMA/dissolve/60/gravity/south/dx/0/dy/60|watermark/1/image/aHR0cDovL2V4YW1wbGVzLTEyNTgxMjU2MzguY29zLmFwLWd1YW5nemhvdS5teXFjbG91ZC5jb20vbG9nby5wbmc/gravity/center/dx/0/dy/0/dissolve/71
      4. Use the transparent image as the image watermark and add the watermark to the original image:
      https://examples-1258125638.cos.ap-guangzhou.myqcloud.com/preview.png?watermark/1/image/aHR0cDovL2V0ZXJuYXV4LTEzMDE0NTM1NTAuY29zLmFwLWd1YW5nemhvdS5teXFjbG91ZC5jb20vdHJhbnNwYXJlbnQucG5nP3dhdGVybWFyay8yL3RleHQvVlVsT09pQXhNak0wTlRZL2ZvbnQvU0dWc2RtVjBhV05oTG1SbWIyNTAvZm9udHNpemUvNDgvZmlsbC9JekF3TURBd01BL2Rpc3NvbHZlLzYwL2dyYXZpdHkvc291dGgvZHgvMC9keS82MHx3YXRlcm1hcmsvMS9pbWFnZS9hSFIwY0RvdkwyVjBaWEp1WVhWNExURXpNREUwTlRNMU5UQXVZMjl6TG1Gd0xXZDFZVzVuZW1odmRTNXRlWEZqYkc5MVpDNWpiMjB2Ykc5bmJ5NXdibWMvZ3Jhdml0eS9jZW50ZXIvZHgvMC9keS8wL2Rpc3NvbHZlLzcx/gravity/southeast/dx/0/dy/0/dissolve/90
      You can also use the scatype parameter to scale the image watermark proportionally to the image size and use the batch parameter to tile the image watermark.
      https://examples-1258125638.cos.ap-guangzhou.myqcloud.com/preview.png?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
      
      Hubungi Kami

      Hubungi tim penjualan atau penasihat bisnis kami untuk membantu bisnis Anda.

      Hubungi Kami
      Dukungan Teknis

      Buka tiket jika Anda mencari bantuan lebih lanjut. Tiket kami tersedia 7x24.

      Kirim Tiket
      Dukungan Telepon 7x24
      Copyright © 2013-2024 Tencent Cloud. All Rights Reserved.
      Kebijakan PrivasiLegalKebijakan Cookie