# [texhax] Achieving the optimum quality of rendering

Tue Mar 4 12:57:55 CET 2014

On Mar 3, 2014, at 11:20 PM, William F Hammond wrote:

> For pdf output I think it's a bit more complicated than that.
>
> It depends on what is the original format for the image.  You
> want both the image used for pdf output and the image used for
> dvi output to be as close as possible to the original image.
>
> For example, if the original is eps, then "epstopdf" (found on
> CTAN or in many TeX distributions) will make good pdf for use
> with \includegraphics toward pdf output.
>
> But if the original image is png or jpeg, then
> \includegraphics will use that with pdflatex (so long as no
> pdf file with the same stem name is present).

That's why I said:

>> there's no reason not to just make good quality
>> .pdf files for inclusion into your pages

A .pdf will be included and won't have its quality diminished by inclusion into a .pdf generated directly by pdflatex.

It's more efficient, it's more direct, it's simpler and it's elegant (in the sense of scientific correctness).

When you make a .pdf from a pixel file, set the compression appropriate to the file's content --- that's part and parcel of making ``a good quality file''.

When you make a .pdf from a vector image, ensure that the vectors / Bézier curves are preserved (and that the image is not converted into a pixel file)  --- that's part and parcel of making ``a good quality file''.

&c.

William

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