support knowledge base for PDF scanned copies

[winter-hand-code]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

Will it support uploading PDF scanned files to the knowledge base in the future, as a large number of PDFs are scanned in practical scenarios. Or if there are any ideas that can help me solve this problem, thank you for your answer.

2. Additional context or comments

No response

3. Can you help us with this feature?

• [x] I am interested in contributing to this feature.

[crazywoola]

Currently, the Doc Extractor node is not particularly good for scans.

[dosubot[bot]]

Hi, @winter-hand-code. I'm Dosu, and I'm helping the Dify team manage their backlog. I'm marking this issue as stale.

Issue Summary:

• You requested a feature to support uploading scanned PDF files to the knowledge base.
• Highlighted the practical necessity of this feature.
• Expressed interest in contributing to its development.
• Comment from "crazywoola" noted that the current Doc Extractor node is not well-suited for scanned documents.

Next Steps:

• Please let us know if this issue is still relevant to the latest version of the Dify repository by commenting here.
• If there is no further activity, this issue will be automatically closed in 15 days.

Thank you for your understanding and contribution!

[AnyangAngus]

Currently, the Doc Extractor node is not particularly good for scans.

@crazywoola meet same issue , any suggestions?