We're sorry Aspose doesn't work properply without JavaScript enabled.

Free Support Forum - aspose.com

Images in pdf (DocuSign signatures) are turning black after optimization

We are using aspose pdf 22.12 for java and using the recommended process to optimize the size of the pdf. (https://docs.aspose.com/pdf/java/optimize-pdf/) When we perform the optimization all of the DocuSignature blocks turn black. It looks like the background is changing from transparent to black but I don’t know for sure. This issue also happens on the aspose website https://products.aspose.app/words/compress/pdf

While testing I also noticed that using a PdfExtractor causes the same issue with the image. The background is black as well.

I think this is a bug and if not is there a recommended fix?
Original Document: source_file.pdf (170.6 KB)

Optimized Document: reduce.pdf (164.5 KB)

Extracted Png: extracted_image.jpg (23.5 KB)


We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): PDFJAVA-42521

You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.

Wanted to note here I just tested on the latest version 23.2 and the issue is still happening after updating. Still seeing it on the online compress tool provided by aspose as well.


The ticket has just been logged and it is not yet investigated. That is why you are still noticing this issue in the latest release. We will let you know as soon as this issue is fixed and fix-in version is available for use. Please spare us some time. We are sorry for the inconvenience.

1 Like