Determine Correct Page Orientation?

[MatthewPierce]

Is there a way to programmatically determine if a page needs to be rotated 90, 180, or 270 degrees based on the text content of the page?

I have a huge population of PDFs that need to be "fixed" by rotating the incorrectly oriented pages, and I really don't want to have to do it manually.

Thanks.

[Simon.yang]

Hello,

Thanks for your inquiry. I am sorry Spire.Pdf doesn't support to do so. But If the PDF files have been rotated before and result in the wrong orientation, you could recover it like below.

Code: Select all

            PdfDocument doc = new PdfDocument();
            doc.LoadFromFile(@"test.pdf");
            foreach (PdfPageBase p in doc.Pages)
            {
                if (p.Rotation != PdfPageRotateAngle.RotateAngle0)
                {
                    p.Rotation = PdfPageRotateAngle.RotateAngle0;
                }
            }
            doc.SaveToFile("testR.pdf");


Best regards,
Simon
E-iceblue support team

[Simon.yang]

Hello,

Greeting from E-iceblue.
How is the issue going? Is the code snippet helpful to you?
Your feedback will be greatly appreciated.

Best regards,
Simon
E-iceblue support team

[MatthewPierce]

Unfortunately, this does not solve my problem, but that bit of code may be useful for future projects. Thanks for that.

Currently I'm relying on the Adobe Acrobat Optimization feature with text recognition turned on. This achieves the goal of page rotation, but it takes a lot of processor time. When working with large document populations (100k pages or more) it is causing a bit of a bottleneck.

Thank you for your time.

~Matthew

[Simon.yang]

Hello Matthew,

Thanks for your reply. If there is any other question, welcome to contact us.

Best regards,
Simon
E-iceblue support team