True - I needed logo a silkscreen for a Rockwell Collins device I was designing. Needed the color seps of a vector based artwork for a rack unit I was having machined.
The only place I could find one in the short term (after asking corporate for one who had no clue waht I meant by "vector" ) was in their Stockholders Quarterly Report... I used Corel to rip it out of the PDF and was able to give a preflight that was close to the artwork guys at the machine shop for the silkscreen dude...
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On 7/31/2017 2:30 PM, Ryan Daughtry rayanth@... [7x12minilathe] wrote:
"actually a .PDF is an image file."
I am intimately familiar with the 1200+ page PDF Specification, as I write
programs to read PDFs. They are not image files. They can contain images,
but they are not images themselves, they are a descriptive language, with
roots in the same PostScript language that your computer uses to tell your
printer how to print a document. PDF Language defines all of the constructs
needed to generate vector graphics, basic geometric shapes, text, embedded
pictures, and with proper extensions, even multimedia such as sound,
videos, 'virtual 3d graphics', etc.
Due to the overhead of the PDF language, a PDF containing only embedded
imagess will almost always be larger in disk size than the image files
themselves. (Exception being if the image file was a low-compression jpeg,
or uncompressed image like GIF or BMP, as PDF may manage to compress it
more)
As for why an image file might be needed over a PDF, many image sharing
sites will only let you share image files, and not PDFs. Since the
discussion devolved from where to host images to share, I presume there's
still consideration for using image sharing sites, rather than generic
cloud storage, which would let you store and share anything - and be more
likely to compromise other personal files and information if hacked.
-- Ryan
On Mon, Jul 31, 2017 at 11:16 AM, rhulslander@... [7x12minilathe] <
7x12minilathe@...> wrote:
actually a .PDF is an image file.
If you have a .pdf why do you need a image.
Just put it somewhere on the web and do a link to it.
.PDF readers are free.
Ralph
