Delete Image signatures from documents

GroupDocs.Signature provides ImageSignature class to manipulate image signatures and delete them from the documents over delete method.
Please be aware that delete method modifies the same document that was passed to constructor of Signature class.

Here are the steps to delete Image signature from the document with GroupDocs.Signature:

  • Create new instance of Signature class and pass source document path as a constructor parameter;
  • Instantiate ImageSearchOptions object with desired properties;
  • Call search method to obtain list of ImageSignature;
  • Select from list ImageSignature object(s) that should be removed from the document;
  • Call Signature object delete method and pass one or several signatures to it.

This example shows how to delete Image signature that was found using search method.

Signature signature = new Signature("signed.pptx");
    ImageSearchOptions options = new ImageSearchOptions();
    // search for image signatures in document
    List<ImageSignature> signatures =, options);
    if (signatures.size() > 0)
        ImageSignature imageSignature = signatures.get(0);
        boolean result = signature.delete("signed-output.pptx",imageSignature);
        if (result)
            System.out.print("Image signature at location "+imageSignature.getLeft() + "x"+imageSignature.getTop()+" and Size "+imageSignature.getSize()+" was deleted from document [signed-output.pptx].");
            System.out.print("Signature was not deleted from the document! Signature at location "+imageSignature.getLeft()+"x"+imageSignature.getTop()+" and Size "+imageSignature.getSize()+" was not found!");
} catch (Exception e) {
    throw new GroupDocsSignatureException(e.getMessage());

More resources

Advanced Usage Topics

To learn more about document eSign features, please refer to the advanced usage section.

GitHub Examples 

You may easily run the code above and see the feature in action in our GitHub examples:

Free Online App 

Along with full-featured .NET library we provide simple, but powerful free Apps.
You are welcome to eSign PDF, Word, Excel, PowerPoint documents with free to use online GroupDocs Signature App.