4 StampAnnotations in place of 2 opening a specific document

Aspose.PDF Product Family
1

Hello,

We are using Aspose.PDF.Drawing 25.2

When opening the attached document in Adobe or Wondershare PDFElement, we see 2 stamp annotations.

When opening the same document with Aspose, there are 4 StampAnnotation. Note that when opening another document with Stamp annotations, the number of annotations is correct.

var doc = new Document(“ADOBE Stempeltest (1).pdf”, null);
var cnt = doc.Pages[1].Annotations.Count;
//cnt has value 4 and All annotations are StampAnnotations.

ADOBE Stempeltest.pdf (50.6 KB)

2

@tfipsrd

It seems that you are encountering an issue where Aspose.PDF is detecting 4 StampAnnotations in your document, while other PDF viewers like Adobe and Wondershare PDFElement show only 2. This discrepancy can occur due to how different PDF libraries interpret and render annotations.

To troubleshoot this issue, you can try the following steps:

  1. Check for Duplicate Annotations: It’s possible that the document contains overlapping or duplicate annotations that Aspose.PDF is interpreting as separate entities. You can iterate through the annotations and check their properties (like position and size) to see if they are indeed duplicates.

  2. Update Aspose.PDF: Ensure that you are using the latest version of Aspose.PDF. Sometimes, bugs are fixed in newer releases, and updating might resolve the issue.

  3. Extract and Analyze Annotations: You can use the following code snippet to extract and analyze the annotations in your document. This will help you understand why Aspose is counting more annotations than expected:

    var doc = new Document("ADOBE Stempeltest (1).pdf", null);
foreach (var annotation in doc.Pages[1].Annotations)
{
    if (annotation is StampAnnotation stampAnnotation)
    {
        Console.WriteLine($"Stamp Annotation: {stampAnnotation.Subject}, Position: {stampAnnotation.Rect}");
    }
}

  4. Compare with Other Tools: If possible, compare the output of your Aspose code with the output from other PDF libraries or tools to see if they yield the same number of annotations.

If the issue persists after trying these steps, consider reaching out to Aspose support with the specific document and details of your findings for further assistance.

Sources:
No specific sources were referenced in this response.

3

Hello,

This suggestion of filtering annotations according to position and size is not acceptable because it might be that these overlapping annotations have other different properties, such as color or replies. In these case, what will be the criteria to filter out an annotation and not the other one? It might be also the criteria of keeping one overlapping annotation will not be the same as the one of another application.

5

@tfipsrd

Why did you decide that they are all Stamp?
If I run the code, it will output 2 Stamp and 2 Popup

var doc = new Document(dataDir + "ADOBE Stempeltest.pdf");
var cnt = doc.Pages[1].Annotations.Count;

foreach (Annotation ann in doc.Pages[1].Annotations)
    Console.WriteLine(ann.AnnotationType);

When I look at the contents of the attached document page in Acrobat Pro, it also shows 4 annotations - 2 Stamp and 2 Popup.
1.png (40.6 KB)

6

Yes indeed.
After deeper investigation, we noticed the issue is on our side.
Sorry for inconvenience.

7

@tfipsrd
Write to us if you have any questions.