[scribus] Lighten dark colors

[Bert Driehuis]

If your printer is an offset outfit, chances are they are using
Fogra39. You probably don't have a cheap way to do a trial print, do
you?

Don't know an answer to your question, but using ImgeMagick to fix up
jpg colors will significantly reduce image quality, so figuring out
the ICC profile is your best bet.


With kind regards,

Bert Driehuis

On Fri, Jul 10, 2020 at 10:09 AM JLuc <jluc at no-log.org> wrote:
>
> Le 10/07/2020 à 09:56, JLuc a écrit :
> > My new printer didnt provide an ICC profile file when asked (said it's not required afaicr).
> >
> > Printed photos are not too bad but are quite often too contrasted
> > and dark areas appear flattened and shifted to the very dark.
> > Sometimes also the light areas appear also flattened and shifted to the very light
> > but most issues are with darker areas.
> >
> > I've asked some advices to the printer but i'm afraid i wont get usefull answer.
> > (Do you sometime get any usefull answers from your printers ?)
> >
> > As for now i'm thinking of bash-editing all images so as to curve the dark colors lighter.
> > How could i best bash achieve this on linux ?
>
> After trying a few parameters it looks like this command could do :
> convert cheval.jpg -level -0%,100%,1.5 cheval-level0,100,1.5.jpg
> My other questions remain open.
>
> > What should i care do to avoid worsening the print ?
>
> JL
>
>
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