Help Center/ Data Security Center/ User Guide/ Data Asset Protection/ Data Watermarking/ Injecting or Extracting Image Watermarks
Updated on 2025-08-12 GMT+08:00
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Injecting or Extracting Image Watermarks

The DSC console offers a feature for injecting watermarks into JPG or JPEG files. You can refer to this section to apply customized watermarking to your cloud-stored files in OBS buckets or to images on your local device.

The content of an invisible watermark remains unseen until it is retrieved through a specialized watermark extraction tool. The DSC console facilitates this process by offering a watermark extraction feature for images. Detailed instructions on how to extract watermarks from files stored in OBS buckets or from local files are provided in this section.

Prerequisites

Constraints

  • The maximum size of an image is 20 MB.
  • The resolution of the image to be watermarked must be greater than 128 x 128 pixels.
  • The maximum length of the invisible text watermark is 32 characters.
  • Images in *.tiff, *.tif, and *.tga formats do not support watermark preview.
  • When Watermark Content is set to Image, only logo images in the digital or letter style are supported.
  • This section describes how to extract invisible watermarks from an image.
  • The invisible watermark content contains a maximum of 32 bytes.

Injecting or Extracting Image Watermarks

To inject data watermarks to or extract them from an image, perform the following operations:

  1. Log in to the DSC console.
  2. Click in the upper left corner and select a region or project.
  3. In the navigation pane on the left, choose Data Asset Protection > Image Watermarking.
  4. In the OBS Bucket Files tab, set the path in the File Settings area.

    Figure 1 File settings
    1. Click Add next to Original image path to select the cloud path of the original images. The size of the selected image cannot exceed 20 MB.
    2. Click Add next to Storage destination path to select the destination storage path.
    3. Click the Save Target File Name text box and enter the name of the watermarked image file. The file name contains a maximum of 32 characters and the file name extension is jpg, jpeg, png, bmp, tiff, tif, tga, or gif. Images in *.tiff, *.tif, and *.tga formats do not support watermark preview.

  5. Watermark type can be visible watermark and invisible watermark.

    • Visible watermark: The watermark can be displayed on the image. For details about the related parameters, see Table 1.
      Table 1 Configuring a visible watermark

      Parameter

      Description

      Watermark Content

      Select the Watermark Content from the drop-down list box.

      • Image watermark
      • Text watermark.

      Image Path

      If Watermark Content is set to Image watermark, click Add to select an image on the cloud as the watermark.

      The watermark image must be in the same area as the original image. Otherwise, the preview fails.

      Text Content

      If Watermark Content is set to Text Watermark, click the text box and enter the text watermark content. The value contains 1 to 32 characters, including only digits and case-sensitive letters.

      Watermark Position

      Select the position where the watermark is injected.

      Image Size

      Absolute size of the image to be injected. This parameter is displayed when Watermark Content is set to Image watermark. The value ranges from 0 to 100.

      Watermark Size

      Size of the text watermark to be injected. This parameter is displayed when Watermark Content is set to Text watermark. The value ranges from 1 to 100.

      Watermark Transparency

      Transparency of the watermark to be injected. The value ranges from 1 to 100.

      Horizontal Margin

      Horizontal margin of the watermark to be injected relative to the image. The value ranges from 0 to 100.

      Vertical Margin

      Vertical margin of the watermark to be injected relative to the image. The value ranges from 0 to 100.

      Font Color

      This parameter is displayed when Watermark Content is set to Text watermark. You can click the color bar to select the font color of the text watermark to be injected.

      Figure 2 Configuring a visible watermark
    • Invisible watermark: The watermark text is invisible and needs to be extracted using tools. For details about how to extract an invisible watermark, see Extracting Image Watermarks from an Image in an OBS Bucket and Extracting Watermarks from a Local Image.

      For effective watermark embedding, the resolution of the watermark image should be at least 64 x 64 pixels. Upon extraction, the watermark will be displayed as a downscaled version, resized to precisely 64 x 64 pixels.

      Table 2 Configuring an invisible watermark

      Parameter

      Description

      Watermark Content

      Select the Watermark Content from the drop-down list box.

      • Image watermark
      • Text watermark.

      Text Content

      If Watermark Content is set to Text Watermark, click the text box and enter the text watermark content. The value contains 1 to 32 characters.

      Image path

      If Watermark Content is set to Image watermark, click Add to select an image on the cloud as the watermark.
      Figure 3 Configuring an invisible watermark

  6. After parameters are configured, click OK. The file with watermark injected is automatically downloaded to the specified path on the local PC.

  7. Click Preview in the lower left corner of the page and preview the watermark effect in the visible watermark preview area on the right. The invisible watermark cannot be previewed.
  8. Click OK to complete watermark injection.
  1. Log in to the DSC console.
  2. Click in the upper left corner and select a region or project.
  3. In the navigation pane on the left, choose Data Asset Protection > Image Watermarking.
  4. Click the Local File tab. The Watermark Injection page is displayed.
  5. Click Add File and select the local image file to which you want to add watermarks.
  6. Watermark type can be visible watermark and invisible watermark.

  7. Set the watermark parameters according to Table 3.

    Table 3 Watermark settings

    Watermark Type

    Parameter

    Description

    Visible watermark

    Watermark Content

    Select the watermark content from the drop-down list box.

    • Image watermark
    • Text watermark.

    Watermark Image

    When Watermark Content is set to Image watermark, click Add File to add an image as the watermark.

    The watermark image must be in the same area as the original image. Otherwise, the preview fails.

    Text Content

    This parameter is displayed when Watermark content is set to Text watermark. Click the text box to enter the text watermark content. The text watermark contains 1 to 32 characters, including only digits and case-sensitive letters.

    Watermark Position

    Select the position where the watermark is injected.

    Image Size

    Absolute size of the image to be injected. This parameter is displayed when Watermark Content is set to Image watermark. The value ranges from 0 to 100.

    Watermark Size

    Size of the text watermark to be injected. This parameter is displayed when Watermark Content is set to Text watermark. The value ranges from 1 to 100.

    Watermark Transparency

    Transparency of the watermark to be injected. The value ranges from 1 to 100.

    Horizontal Margin

    Horizontal margin of the watermark to be injected relative to the image. The value ranges from 0 to 100.

    Vertical Margin

    Vertical margin of the watermark to be injected relative to the image. The value ranges from 0 to 100.

    Font Color

    This parameter is displayed when Watermark Content is set to Text watermark. You can click the color bar to select the font color of the text watermark to be injected.

    Invisible watermark

    Watermark Content

    Select the watermark content from the drop-down list box.

    • Image watermark
    • Text watermark.

    Watermark Image

    This parameter is displayed when Watermark Content is set to Image watermark. Click Add File to select a local image as the watermark.

    Text Content

    This parameter is displayed when Watermark Content is set to Text watermark. Click the text box to enter the watermark text content.
    Figure 4 Watermark settings

  8. After parameters are configured, click OK. The file with watermark injected is automatically downloaded to the specified path on the local PC.

  1. Log in to the DSC console.
  2. Click in the upper left corner and select a region or project.
  3. In the navigation pane on the left, choose Data Asset Protection > Document Watermarking.
  4. Click the Watermark Extraction tab. The Watermark Extraction page is displayed.
  5. Select the content to be extracted.

    • If Extracted Content is set to Text, click Add to select the image from which the watermark is to be extracted.
      Figure 5 Extracting text content
    • If Extracted Content is set to Image:
      1. Click Add next to Select File and select the image from which you want to extract watermarks.
      2. Click Add next to Storage Destination Path and select the path for storing the extracted watermark image.
      3. In the Target Storage File field, enter the name of the watermark image file you want to extract. The file name extension must be jpg, jpeg, png, bmp, tiff, tif, tga or gif.
      Figure 6 Extracting image content

  6. Click OK. If the Extracted Content is Text, the invisible watermark content is displayed in the dialog box. If the Extracted Content is Image, view the image in the target storage path.
  1. Log in to the DSC console.
  2. Click in the upper left corner and select a region or project.
  3. In the navigation pane on the left, choose Data Asset Protection > Document Watermarking.
  4. On the displayed page, choose Local > Extract Watermark. The Extract Watermark page is displayed.
  5. Select the Extracted Content.

    • If the Extracted Content is Text, click Upload File to upload the local image whose invisible watermark needs to be extracted to the DSC platform.
    • If the Extracted Content is Image, click Upload File to upload the image whose invisible watermark needs to be extracted from the local host to the DSC platform.

  6. After the file is uploaded, click OK and view the invisible watermark content.
Parent Topic: Data Watermarking