Has DigiKam a limit on file sizes?

[Remco Viëtor]

On dimanche 22 janvier 2017 08:18:01 CET jdd wrote:
> Le 21/01/2017 à 12:01, Arran a écrit :
> > just black ink on white paper, it seems logical to me to convert the
> > original into a vector grafic (here with inkscape) after I have scanned
> 
> I think you misunderstand something (or it's me :-()
> 
> You have black and white artwork (china's ink?), not vector graphic one.
> If you scan it it can't be other than bitmap.

Well, that's what OP says now, in his original post it was crayon ...

> A printed 300 dpi scan is visually identical to the original, it's what
> photocopiers do and one can't see any scale on letters
> 
> eventually you can go as large as 600 dpi. Other definitions are for
> transparency (diapos) printed or displayed much larger than the original
> size.
> 
> If you print the drawing larger than original size, you will see the
> original paper defects, or ink bluring in the paper

That will depend on the viewing distance. Of course, blow it up 10x, you will 
see pixelisation and such, when looking from 30-50 cm. But such prints are 
usually viewed from a larger distance (have a look at a billboard print).

> you can't really make a vector from a bitmap. You can try with a draft
> of mechanical engineering, with constant thread width and the result is
> ugly. You certainly can't go from inkscape to gimp and vice-versa. The
> best you can achieve is ti have inkscape store your drawing as bitmap...

That made me cringe a bit as well: Inkscape should be able to provide print 
output at any size you want. If you are printing yourself, that's easy to 
test. If not, you'll have to talk to the print shop anyway, to see what format 
they prefer (and if it's jpg for line-art, find another shop).

> the only way to make real vector graphic is to draw with stylet and
> table directly in the computer
> 
> anyway to print post card, vector graphics is not needed

Indeed, vectoristation sounds like  a waste of time when the final size is 
smaller than the original, and even for most larger sizes, _if_ they are 
supposed to be viewed from larger distances.
 
But, this is getting away from "using Digikam". Looking for "Arranmarketing", 
I see that it's a consultancy firm. Perhaps they are better off consulting 
with professionals (artists, printers, and why not photographers) about how to 
scan and what file formats and resolutions to use. 

Remco.