Images from PDF to presentation: low quality I have a PDF that has some embedded images, and for some reason I'm not able to extract them with wondershare PDF editor (they're not even seen as images). So I tried to make a screenshot with cmd+alt+4 but the captured images have a too low quality, specially when I insert them into a powerpoint presentation. This is how they are seen in the PDF:  

And this is how they appear in the presentation: 

I don't know if you can see the difference, but it's clearer when I run the presentation on my macbook. The problem is that I don't find a way to directly extract the images, so I'm looking for an alternative solution, something like a high-quality screenshot or another way to extract images from the PDF.
Preview app on 10.6.8 doesn't let you extract images except by selecting then copying and creating a new file from clipboard.

Another way is using the free unix xpdf tools. They come with a utility called pdfimages. I just used it on a PDF and it perfectly extracted the images from the file.

For example...

pdfimages -f 2 -l 2 -j 27487.pdf testname

It extracted the images starting (-f) and ending (-l) on page 2 and saved as JPG.

xpdf is available from HomeBrew.

HTH