PDF4me

Overview

This node operation "Add Image Watermark To Image" allows users to overlay a watermark image onto another image. It supports multiple input methods for both the main image and the watermark, including binary data from previous nodes, base64 encoded strings, or URLs. Users can customize the watermark's position, opacity, rotation, and offsets to precisely control how the watermark appears on the target image.

Common scenarios include branding images with logos, protecting photos by adding copyright marks, or visually marking images for internal use. For example, a marketing team might automatically add their company logo as a watermark to product images before publishing them online.

Properties

Output

The node outputs the watermarked image as binary data under the specified binary data output name (default is "data"). The output contains the image file with the watermark applied according to the configured settings. This binary data can be used downstream in workflows for saving, uploading, or further processing.

Dependencies

• The node requires access to image data either from previous nodes (binary), base64 strings, or URLs.
• No external API keys or services are explicitly required based on the static code analysis.
• Proper handling of binary data within n8n is necessary.
• Network access may be needed if URLs are used to fetch images or watermarks.

Troubleshooting

• Common Issues:

  • Incorrect binary property names may cause the node to fail to find the image or watermark data.
  • Invalid or inaccessible URLs will result in errors fetching the images.
  • Providing malformed base64 strings will cause decoding failures.
  • Setting opacity outside the 0.0 to 1.0 range may lead to unexpected results.
  • Using custom positions without proper coordinates may place the watermark off-canvas.

• Error Messages:

  • Errors related to missing binary data typically indicate incorrect binary field names or missing prior node outputs.
  • Network errors when fetching URLs suggest connectivity issues or invalid URLs.
  • Decoding errors for base64 inputs indicate improperly formatted strings.

• Resolutions:

  • Verify binary field names match those output by previous nodes.
  • Ensure URLs are reachable and point directly to image files.
  • Validate base64 strings before input.
  • Use the provided UI controls to set valid opacity and position values.

Links and References

• n8n Documentation on Working with Binary Data
• Image Watermarking Concepts
• Base64 Encoding Reference