[poppler] Question about setting PPI when generating image from pdftoppm

[Adrian Johnson]

On 22/07/17 06:48, Jason Crain wrote:
> On Fri, Jul 21, 2017 at 01:52:16PM -0700, Min Su wrote:
>> I'm trying to set PPI when generating image from pdftoppm,but it seems like
>> we only have parameters to set DPI "-r". I think the "r" here means
>> resolution and the value should be a DPI. Since DPI is different from PPI,
>> what if I want to set resolution by using PPI? Is there a way to translate
>> them or there's another parameter which can take PPI?
> 
> Probably the manpage and --help text are inaccurate and should say PPI
> instead of DPI, since pdftoppm is outputting to an image and not a
> printer.

Yes it should be changed to PPI. The pdftocairo manpage and --help text
uses PPI.