I don't know what you code is doing, since you didn't post it, but Acrobat's 
Create Inventory report shows that there is one image in the lopd.pdf file.

Leonard

From: Daniel Oliveras <[email protected]<mailto:[email protected]>>
Reply-To: Post here 
<[email protected]<mailto:[email protected]>>
To: Post here 
<[email protected]<mailto:[email protected]>>
Subject: [iText-questions] Unable to locate images in a PDF document.

Hi,

We need to obtain the images included in a PDF document that another system 
generates and replace these images with signature fields. This is done this way 
because we never know the position the signature has to be placed until we 
obtain the PDF so in order to determine the position we use the images and 
replace them with the signature fields.

Attached to this mail I send two PDF documents the one named “pdf-lopd.pdf” 
works fine, Using iTextSharp we can find the images and replace them. But with 
the document named “pdf-lopd 10.7.pdf” iTextSharp find no images.

For what we know the system that generates the PDF documents have changed 
something internally, we believe they use aspose.words to convert a Word 
document into a PDF one.

NOTE: The images used are white rectangles. No image is seen if the document is 
printed.
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