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What is the image format of the images embedded in the multi-page PDFs created by DWT?

I'm attempting to extract the image information from a multipage PDF. I can get the embedded image stream, which is encoded with an LZW encoding. I can then decode the LZW byte stream, presumably into the image's bytes. But the resulting file does not seem to be a JPEG. I can't tell if the decoding process is flawed or the JPEG assumption is incorrect so I need to know please the image format in which this byte stream has been stored.

Also, can you please provide documentation on how to control the embedded image factors such as JPEG Quality in DWT?

Sorry, solved. I was not seeing the PDFCompressionType property.

Thanks.