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 Tiff image squished in pdf		  New Topic  Reply to Topic
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ioan

USA
15 Posts
Posted - Nov 02 2020 :  14:41:56  Show Profile  Reply
I'm trying to make a pdf from tiff images, but the images in the pdf are squished. If I use the same tiff in imagemagick, the pdf appears fine, but the one I create with imageen is squished. Is there anything I'm doing wrong? Here is my code I'm using to create the pdf:


    tiff := TIEMultiBitmap.Create;
    try
      tiff.ParamsEnabled := True;
      tiff.Read(TiffFileName, nil, true);
      tiff.Params[0].TIFF_Compression := ioTIFF_JPEG;
      tiff.Params[0].PDF_Compression := ioPDF_JPEG;
      tiff.DuplicateCompressionInfo;
      tiff.Write(PDFFileName, ioPDF);
    finally
      tiff.Free;
    end;


Please see the attached zip for the tiff file and the example pdf

attach/ioan/2020112144027_tiff-example.zip
34.79 KB

xequte

38203 Posts
Posted - Nov 02 2020 :  16:10:13  Show Profile  Reply
Hi Ioan

The horz. DPI is 204, whereas the vert. DPI is 98.

Setting them both to the same value should resolve the issue.

https://www.imageen.com/help/TIOParams.DpiX.html
https://www.imageen.com/help/TIOParams.DpiY.html

Nigel
Xequte Software
www.imageen.com
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ioan

USA
15 Posts
Posted - Nov 02 2020 :  17:07:49  Show Profile  Reply
Hi Nigel,

Setting the DpiX and DpiY the same value doesn't seem to fix the problem.
Here is how the tiff looks like in infranview and how the pdf comes out, doesn't matter what DPI values I use.




I also attached the original tiff file here:





attach/ioan/202011217859_771B8EA2E18E4E949E613AA7A13BD0CD.zip
14.34 KB
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xequte

38203 Posts
Posted - Nov 02 2020 :  22:34:17  Show Profile  Reply
Sorry, you'll also need to scale the image to correct the unequal DPI.

With TImageEnMIO you can do this automatically using:

https://www.imageen.com/help/TImageEnMIO.AutoAdjustDPI.html


You can email me for a source update that allows you to easily do this with TIEMultiBitmap too.

// load a TIFF, fix the DPI and save it
IEGlobalSettings().AutoAdjustDPI := True;
mbmp := TIEMultiBitmap.create;
mbmp.Read('input.tiff');
mbmp.Write('output.tiff');
mbmp.free;


Nigel
Xequte Software
www.imageen.com
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ioan

USA
15 Posts
Posted - Nov 03 2020 :  12:32:08  Show Profile  Reply
Yes, TImageEnMIO with AutoAdjustDPI solves the problem.

I also sent you an email for the updated source to use TIEMultiBitmap.

Again, thank you for your help!
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