Ok, that makes sense. Which part are you having a problem with? — John
> On 12 Aug 2015, at 07:31, Kirk, Kenneth <kk...@ilsos.net> wrote: > > I'm doing both. I provide a service that takes tiff files from one of the > various processes we use to generate official documents and converts them to > PDFs so they can be stored in a document management system. Then for > archival purposes I have to take selected documents from the document > management system and convert them back to tiff so they will run through the > software/hardware that converts them to microfilm for a disaster recovery > policy requirement. > > -----Original Message----- > From: John Hewson [mailto:j...@jahewson.com] > Sent: Tuesday, August 11, 2015 9:11 PM > To: users@pdfbox.apache.org > Subject: Re: Rendering PDImageXObject > > >> On 11 Aug 2015, at 08:19, Kirk, Kenneth <kk...@ilsos.net> wrote: >> >> John >> >> How would I know what DPI the image was drawn with? Some of the PDF pages >> come from source outside of my control but I have to extract them just the >> same. > > I’m confused, you said you were converting TIFFs to PDF but now you mention > PDF pages from external sources? Are you reading the PDFs or writing them? > Did you mean that the TFF images come from an external source? > > — John > >> -----Original Message----- >> From: John Hewson [mailto:j...@jahewson.com] >> Sent: Monday, August 10, 2015 1:38 PM >> To: users@pdfbox.apache.org >> Subject: Re: Rendering PDImageXObject >> >> >>> On 10 Aug 2015, at 05:58, Kirk, Kenneth <kk...@ilsos.net> wrote: >>> >>> I have a situation that maybe someone has already solved in a more >>> efficient manner. When converting a tiff image to PDF I use the drawImage >>> method of the PDPageContentStream. The tiff image has a resolution of 200 >>> DPI which is 1700x2200. When PDFRenderer renders this image from the >>> resulting PDF page it does so at the PDF default of 72 DPI which logically >>> translates to page 23 inches by 30 inches when applied to the original >>> iamge size of 1700x2200. Since I don't know after the fact what DPI a >>> image object on PDF page was drawn at I came up with down scaling the image >>> at PDF creation time to 72 DPI. I'm sure there must a better way one of >>> you computer science PHDs have come up with. >>> >> >> You can draw the image with a scale of 72 / 200, in other words: >> >> double dpi = 200; // you’ll want to fetch this from the tiff >> content.drawImage(image, x, y, image.getWidth() * 72 / dpi, >> image.getHeight() * 72 / dpi; >> >> — John >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscr...@pdfbox.apache.org >> For additional commands, e-mail: users-h...@pdfbox.apache.org >> >> >> >> >> >> >> >> >> >> ************************************************ >> Disclaimer - This email and any files transmitted with it are confidential >> and contain privileged or copyright information. You must not present this >> message to another party without gaining permission from the sender. 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