[scribus] TIFF problem and 1-bit images

[Flem]

Le 08/07/2012 20:53, Jussi Pakkanen a écrit :
> On Sun, Jul 8, 2012 at 5:04 PM, john Culleton <John at wexfordpress.com> wrote:
>
>> The png files are big because they are not lossy. But it is
>> possible to compress them when they are created.
>
> The issue is not with the source images, but rather what Scribus does with them.
>
> The original 1 bit TIFF is ~550 KB.
> The converted 1 bit PNG is ~470 KB.
>
> Note that the PNG is actually smaller. When exported from Scribus:
>
> PDF size with TIFF: 11 MB.
> PDF size with PNG: 21 MB.
>
> What could be the cause of this massive difference in size?

Probably the same cause of bigger PDF files exported from 
Scribus than those exported from Adobe software?

In fact Scribus seems to use very few compression when 
exporting.

Beside that, if Scribus could handle 1 bit TIFF like 
InDesign does, you shouldn't have to set them to multiply 
mode to get the result you're attending to.

The question is then: does Scribus keep 1 bit images as is 
when exporting to PDF or does it convert them to RGB or CMYK?

-- 
Flem