Where is PDF image rotation information stored? -

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i trying extract images stored in pdf stream. while can easily, not able accurate image rotation information. looking specific information such mediabox, rotate , landscape/portrait mode.

when extract image, alignment not match end user sees pdf reader tool.

i binary compared 2 pdfs (where image rotated 90 in former , same image rotated 270 in latter) , found difference in particular stream object. however, not able make out stream information is.

here 2 documents talking about:

http://bit.ly/eqzgkj http://bit.ly/g43whb

the position, size , orientation of image when displayed on page determined current transformation matrix (ctm). have execute entire page content stream determine ctm in place when image displayed. it's virtual rendering of pdf page.


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