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 Convert a multi-page PDF into a multi page TIF		  New Topic  Reply to Topic
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jeffp

USA
42 Posts
Posted - Nov 07 2024 :  13:42:13  Show Profile  Reply
I can load a multi page PDF into the TIEPdfViewer. Once loaded how can I then save it out to a multi-page TIF file?

TImageEnView.IO.SaveToFile only seems to save out the first page to a TIF file.


jp

xequte

38607 Posts
Posted - Nov 07 2024 :  16:20:14  Show Profile  Reply
Hi Jeff

Assuming you are dealing only with typical sized PDFs then the easiest way is to use a TIEMultiBitmap or TImageEnMView:

// Convert a PDF to a multi-page TIFF
mbmp := TIEMultiBitmap.Create();
mbmp.LoadFromFile( 'D:\input.pdf' );
mbmp.SaveToFile( 'D:\output.tiff' );
mbmp.Free;


If the PDF files are huge (e.g. 100+ pages at high resolution), then you would be better to build up the TIFF file a page at a time, e.g. using TIETIFFHandler:

http://www.imageen.com/help/TIETIFFHandler.html

Nigel
Xequte Software
www.imageen.com
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jeffp

USA
42 Posts
Posted - Nov 07 2024 :  17:09:26  Show Profile  Reply
Using TIEMultiBitmap is there a way to set the TIF Compression I want, which is LZW.

And is the the best way to convert one file type to another? For example, will it convert TIF to PDF?
jp
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xequte

38607 Posts
Posted - Nov 07 2024 :  21:20:07  Show Profile  Reply
Hi Jeff

You can do it as follows:
// Change the compression method for a TIFF file
MBitmap := TIEMultiBitmap.Create();
MBitmap.LoadFromFile( 'C:\MyImage.pdf' );
MBitmap.Params[ 0 ].TIFF_Compression := ioTIFF_LZW;
MBitmap.DuplicateCompressionInfo();
MBitmap.SaveToFile( 'C:\OutImage.tiff' );
MBitmap.Free;

http://www.imageen.com/help/TIEMultiBitmap.DuplicateCompressionInfo.html

You don't need to actively "convert" the document, it saves in whatever format you specify, e.g. here because you are saving with the extension .tiff, it saves as a TIFF file.



Nigel
Xequte Software
www.imageen.com
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HeartWare

Denmark
50 Posts
Posted - Nov 12 2024 :  04:46:43  Show Profile  Reply
Is there an easy to way to convert a PDF file to a series of PNG files in full resolution using only ImageEn ?
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xequte

38607 Posts
Posted - Nov 13 2024 :  13:46:12  Show Profile  Reply
Hi

It would be the same method as above:

// Change the compression method for a TIFF file
MBitmap := TIEMultiBitmap.Create();
MBitmap.LoadFromFile( 'C:\MyImage.pdf' );
MBitmap.SaveToFile( 'C:\OutImage.png' );
MBitmap.Free;


To improve the quality of the PDF (make the PDF files larger), set the PdfViewerDefaults.Dpi:

http://www.imageen.com/help/TIEGlobalSettings.PdfViewerDefaults.html

You will also need to include iepdf32.dll

Nigel
Xequte Software
www.imageen.com
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