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Am 02.04.2017 um 06:08 schrieb Thorsten Froehlich:
> "Kenneth" <kdw### [at] gmail com> wrote:
>> That's an interesting question. Which I don't know the answer to :-P
>>
>> But I work around it in Photoshop: If I need to change an image's DPI, for
>> printing or whatever, I just go into IMAGE/IMAGE SIZE and fiddle with the
>> resolution there, then re-save it. (If the image is PNG, that's a lossless
>> re-save, quality-wise; but if JPEG, then a 2nd compression quality-loss is
>> incurred... which I usually live with.)
>>
>> That said, it would be nice to be able to specify a DPI setting in POV-Ray.
>
> You do realise that it is pointless to add some arbitrary number to an image
> file? Apart from the fact that misc image formats, JPEG included, don't have a
> standard DPI flag? - It isn't surprising either, as there is absolutely no use
> for it ... I might also add that this discussion comes up every few years. So
> maybe search the newsgroups for the many answers in that regard.
If the image is intended to be printed, there /is/ use for it. You might
argue that it's not a strong enough case, but just because you don't see
a use case doesn't mean there is none at all.
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