Debenu Quick PDF Library - PDF SDK Community Forum : Extracting images from pdf

Extracting images from pdf : Hi!You can read all about this...

Wed, 29 Apr 2009 15:06:42 +0000

Author: Ingo
Subject: 1069
Posted: 29 Apr 09 at 3:06PM

Hi!

You can read all about this case in the online-documentation at:
http://www.quickpdflibrary.com/help/quickpdf/FunctionGroups.php
in section:
"Rendering and printing"
for your job you can take the functions:
"RenderDocumentToFile" and
"RenderPageToFile".
If you don't want to write on disc you can use better
"RenderPageToStream" to go on working with the content.

Cheers, Ingo

Edited by Ingo - 29 Apr 09 at 3:09PM

Extracting images from pdf : Is there a way to convert a...

Wed, 29 Apr 2009 12:48:08 +0000

Author: Hbaloo
Subject: 1069
Posted: 29 Apr 09 at 12:48PM

Is there a way to convert a pdf to a bmp ? If so, how?
What is the diffrence between saving an img in the pdf to file if i put it there in the program, or i loaded the pdf and the picture was included?
Thanks for help!
edit:i don't really need it to save on the disk, but i have to use it in a Bitmap format, maybe it's possible to create a Bitmap variable from the selected image in the document?

Edited by Hbaloo - 29 Apr 09 at 12:57PM

Extracting images from pdf : Hi!As far as i know there isn't...

Mon, 27 Apr 2009 11:37:30 +0000

Author: Ingo
Subject: 1069
Posted: 27 Apr 09 at 11:37AM

Hi!

As far as i know there isn't a documented function for complete imageextraction. The functions have only affect to the images you've inserted yourself before.

Cheers, Ingo

Edited by Ingo - 27 Apr 09 at 11:38AM

Extracting images from pdf : I use FindImages to make sure...

Mon, 27 Apr 2009 10:40:34 +0000

Author: Hbaloo
Subject: 1069
Posted: 27 Apr 09 at 10:40AM

I use FindImages to make sure program detects the pictures, it gives me the correct number(for example this will be x).I use getimageID to get the id of pictures numbered 1 to x.(it seemes that it could get the id of the pictures, it's a quite long number as i rembeber).when i get an ID i use SelectImag, the return value is 1 indicating it's correct.Then i call ImageType, which tells me it's a bmp, which i would like to use in the future so it's perfect.Then comes SaveImagetoFile.It returns 1 , so it should be okay, but it's still just a black page. Here's my code for better understanding(altough it's a bit messy):
MentMappa = "C:\\";
for (int i = 0; i < konyvtar.QuickPDFPageCount(ID); i++)//every page consists of 1 picture,FindImages gives me the number of the images which is equal to the pagenukber so it's correct
                {
                    int kepszam = konyvtar.QuickPDFFindImages(ID);
                    Kepetment = MentMappa + "tmpkep"+(i + 1) + ".bmp";
                    int imgid = konyvtar.QuickPDFGetImageID(ID, i + 1);
                    int kepv = konyvtar.QuickPDFSelectImage(ID, imgid);
                    int keptipus = konyvtar.QuickPDFImageType(ID);
                    int sikeresmentes=konyvtar.QuickPDFSaveImageToFile(ID, Kepetment);
                   //Esetleg a k�pbol kivagom amegfelol reszt
                    BeKep = new Bitmap(Kepetment);
                   // and so on ...
}

Extracting images from pdf : Hi!Which function you're...

Sun, 26 Apr 2009 15:28:45 +0000

Author: Ingo
Subject: 1069
Posted: 26 Apr 09 at 3:28PM

Hi!
Which function you're using? Which is the imagetype? With SaveImageToFile only jpg, bmp and tiff are okay. You can test before the type with ImageType.
Cheers, Ingo

Extracting images from pdf : Hy,I have a pdf file,where every...

Sun, 26 Apr 2009 13:55:39 +0000

Author: Hbaloo
Subject: 1069
Posted: 26 Apr 09 at 1:55PM

Hy,
I have a pdf file,where every page is an image.I'm having trouble saving these images on-by-one to my hard disk. I tried getting the id of the img, selecting by id then saving it, averythin looks great, return values are OK, but the saved picture is black page.Can you help me Please?