Extracting Watermarks from Images

Prerequisites

• OBS asset access permissions are granted. For details, see Allowing or Disallowing Access to Cloud Assets.
• You have enabled and created assets on OBS. For details about how to enable OBS, see Enabling and Using OBS Buckets..
• Currently, the following image format is supported: .jpg, .jpeg, .jpe, .png, .bmp, .dib, .rle, .tiff, .tif, .ppm, .webp, .tga, .tpic, and .gif.
• The resolution of the original image must be greater than 128 x 128 pixels.

Constraints

• Extract invisible watermarks from a single image file.
• The maximum size of an image is 20 MB.
• The invisible watermark content contains a maximum of 32 bytes.

Extracting Watermarks from an OBS Bucket File

1. Log in to the management console.
2. Click in the upper left corner and select a region or project.
3. In the navigation tree on the left, click . Choose Security & Compliance > Data Security Center .
4. In the navigation tree on the left, choose Data Asset Protection > Document Watermarking. On the displayed page, click the OBS File tab.
5. Click the Extract Watermark tab. The Extract Watermark page is displayed.
6. 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 1 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 Target Storage Path and select the path for storing the extracted watermark image.
     3. Click the Target Storage File text box and enter the name of the image file whose watermarks are to be extracted. The file name extension must be *.jpg, *.jpeg, *.jpe, *.png, *.bmp, *.dib, *.rle, *.tiff, *.tif, *.ppm, *.webp, *.tga, *.tpic or *.gif.
     Figure 2 Extracting image content
     

7. 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.

Extracting Watermarks from a Local File

1. Log in to the management console.
2. Click in the upper left corner and select a region or project.
3. In the navigation tree on the left, click . Choose Security & Compliance > Data Security Center .
4. In the navigation tree on the left, choose Data Asset Protection > Document Watermarking. On the displayed page, click the OBS Bucket File tab.
5. On the displayed page, choose Local > Extract Watermark. The Extract Watermark page is displayed.
6. 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.

7. After the file is uploaded, click OK and view the invisible watermark content.