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Converting *.PDF files to *.bmp, *.tiff, etc.

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Converting *.PDF files to *.bmp, *.tiff, etc.

Old 07-29-2018, 09:52 AM
  #1  
MarkD
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Default Converting *.PDF files to *.bmp, *.tiff, etc.

After coming back to the hobby after a 15 year absence I have found that there are a vast number of
model plans out on the net. Most of the sites like Outerzone and AeroFred use the *.pdf format.

I need to get the files into an image format so I can vectorize them for CAD work. I have tried about
a half dozen of the freeware conversion programs but am having trouble with a high failure rate. In about
2/3 of the *.pdf files I try to convert the conversion program crashes or just outputs a blank image as the programs
don't seem to be intended for documents as large as a scanned plan. I've been using both a Windows 7 PC and a Windows 10
laptop with the same results.

Could anyone suggest a conversion program/method that is working well for them?


Thanks,

MarkD
Old 07-29-2018, 01:30 PM
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ByLoudDesign
 
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BlueBeam REVU 2017 is on cheap but it works with all your other progams to build PDF and will convert the to about any othet format you wish!!
Old 07-29-2018, 05:56 PM
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Chad Veich
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I can convert them for you Mark if you email me the PDF files. I can be reached at cwveich@cwvmodels.com if you would like to touch base.

Chad Veich
Old 08-04-2018, 07:55 AM
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Hemikiller
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GIMP works very well and is completely free.

https://gimp.org

What CAD software are you trying to import the images into?
Old 08-04-2018, 07:02 PM
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The real problem is that many pdf files are simply image files planted on a pdf format document.Therefore you cannot reduce the line widths to make vectors,usually at .0 line width.I would love to find a program that converts a image line to a Single width vector line>the image line whether jpg,tiff,bmp is usually an anti aliased line (shading intensity)of about 5 pixels wide,when you blow it up to size.
Old 08-05-2018, 06:19 AM
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Originally Posted by alex5 View Post
The real problem is that many pdf files are simply image files planted on a pdf format document.Therefore you cannot reduce the line widths to make vectors,usually at .0 line width.I would love to find a program that converts a image line to a Single width vector line>the image line whether jpg,tiff,bmp is usually an anti aliased line (shading intensity)of about 5 pixels wide,when you blow it up to size.
Wouldn't we all love that. Given that 99.9% of the plans out there on the web are scans of hand drawn originals, it's the nature of the beast. Only current way to get a good manufacturable part is to redraw in CAD by hand.

IMO, any of the current raster->vector programs are a fool's errand for any sort of CNC cutting. They were never designed to have that level of accuracy, nor will they ever have it. The vector files produced are a complete mess and while perfectly fine for their intended purpose, one spends more time cleaning them up than simply redrawing the parts in CAD. I will redraw parts in CAD and often find errors in the hand drawn parts. Some designers are better than others, but no one was infallible.

Last edited by Hemikiller; 08-05-2018 at 06:29 AM.
Old 08-05-2018, 09:23 AM
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Default inkscape

I was able to extract to dxf using inkscape , but I havent tried it out in acad yet...there is a learning curve.
Old 08-08-2018, 07:09 PM
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If you save the PDF file out as a JPG or Tiff file, most free CAD packages can use it as a background layer so you can trace over it. If you have a vector based PDF, then you might be able to get a fairly decent DXF file out of it. Lots of variables.

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