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IRISOCR™ SDK Documentation

Create PDF with rotated pages

The IRISOCR™ SDK has the notion of original rotation angle in CPageContent2 data representation, accessible via methods Get/SetOriginalRotation() (C++) or property OriginalRotation (.NET).

That member is updated when performing automatic orientation detection via CPageRecognition methods AnalyzeLayout(), AnalyzeLayoutEx(), RecognizePage(), or RecognizePageEx(). You can also modify it directly.

A flag is available in CPdfOutputParameters via methods Get/SetUseOriginalRotation (C++) or property UseOriginalRotation (.NET), with false as default value.
When this flag is set, the pages of the created PDF are rotated according to the original page orientation as mentioned in the page content.

For instance, the PDF generated from an image scanned with 90° rotation would appear in PDF viewers in the same orientation than the image, even if OCR was performed on the correctly-oriented equivalent:

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Image 1. 90° original rotation

The original rotation value is not used by other output formats at the moment.