how best to convert a pdf to a high-res jpg?

[Josef Lowder]

.
Well, thanks to all the helpful suggestions, I'm learning 
a lot of neat new tricks, but I still don't have the result 
that I need. 

When I use the following convert syntax, as suggested: 
> $ convert -quality 100 most.pdf most.jpg 

I get the result shown here: http://mostessential.com/mostblue.jpg
(I renamed it because of the strange colors I get as a result)

== Jeremy C. Reed suggested: 
> The tool "pdfimages" from xpdf suite can extract images from a PDF.
> Use convert or gm to convert the resulting Netpbm PPM file to JPEG

I tried that ($ pdfimages -j most.pdf most.jpg) and that worked great 
to produce an excellent, high resolution result (27.5-meg) with this 
name: most.jpg-000.ppm ... but with only part of the original pdf 
content showing. Some layers vanished. 

I used: convert most.jpg-000.ppm most2.jpg and got a result 1/10th 
the ppm file size: 2,736,590 -- great resolution, but missing parts.

== Bryan O'Neal suggested:
> A cheap trick is to print it directly to a jpg.
> Example: http://projects.cornerstonehome.com/bryan/most.jpg

I can't find any way to print a jpg from adobe acrobat reader. 
As far as I can tell, my 'reader' only gives the option to print
a pdf file to a printer, not to a file as a jpg. 

== Daniel Stasinski suggested: 
> Gimp will natively load and render a PDF file to any size specified.

I tried that and yes, it will load, but when I export from Gimp 
to a jpg file, the result I get is not a good quality image.

== Dennis Kibbe asked (and suggested):
> What exactly do you want to convert? Is there an image in the
> PDF that you want to extract? Or is it the text that you want?

I just need the complete image that I see in the pdf as a jpg. 
I do not need to extract any images or text from the pdf. 

> If the original image file is of low quality ...

The original components and the pdf are very high quality & resolution.

> You could try enlarging in 10% steps. 

Not sure what you mean by that.  I don't think I need to "enlarge" 
anything.  I just need a jpg with high enough resolution to make 
a good photo print.