Importing Images: Default "incorrect" scaling of images
- From: Jay Smith <jay JaySmith com>
- To: dia-list gnome org
- Subject: Importing Images: Default "incorrect" scaling of images
- Date: Wed, 08 Dec 2010 22:57:33 -0500
I am a new user: 0.98+Git on Ubuntu Linux 8.0.4 (Hardy).
(In my last post I say I was on 97, but I am on 98, just installed
today. However, the version information both in the 'About' and by "dia
--version" is showing 97 ????)
I think I am misunderstanding Dia's concept of importing images or
missing some important feature???
I have a library of existing 300 dpi TIFF images which I wish to use in
my diagrams. The primary output target is high resolution printing,
thus the 300 dpi is preferable and they already exist in this form.
When I import an image, it is coming in tiny!! When I print the page
from Dia, the imported image is about 20 mm wide. When I print that
_same_ image from an image program such as Gimp, it prints 151 mm wide.
I understand I can drag it to whatever size I want, but I don't want to
do that. I would like to have the image come in to the page at 100%
"native resolution".
In the object properties, I see that I can keep/constrain (or not) the
aspect ratio (when dragging larger). That's great.
However, I don't see anything in the Properties (including double
clicking on the image item in the tool box) or Preferences about import
scaling.
I understand that import scaling is complicated because it gets into the
issue of what the ppi is of the imported image vs the page width however
that is measured. However, I don't see any controls available (other
than dragging) for controlling and manipulating scaling, either upon
import or after. For example, it would be really nice to be able to
numerically define the target width and/or height (depending if 'keep
aspect ratio' is on or off) both numerically (by a variety of
measurement methods (inches, cm, mm, etc.)) OR by percentage of original
native size.
===
I know that this is really for a different thread, but related to this
issue because it relates to being able to see how large the images are.
I can't make any sense of the rulers vs the display window size vs the
display percentage. I have changed the Preferences, Length Unit to
various settings and I can't see a difference in the rulers, either
dynamically, or when I create a new document, or when I close the
program and then re-open and create a new document. From the program
itself, I can't tell what measurement system the rulers are using. I
apparently am clueless about how the rulers are supposed to be used.
And, the "Help, Help" menu item says "Could not open help directory:
Error opening directory '/usr/share/dia/help': No such file or
directory" so I can't look there for info. I eventually found
http://dia-installer.de/doc/en/index.html but with no help from the program.
Looking at
http://dia-installer.de/doc/en/canvas-chapter.html#Rulers
says the rulers are in centimeters and measure the size of the "canvas".
However, I have not found a definition of "canvas" -- is that the size
of the paper (within the blue lines), or the size of the paper less the
margins? Or something else?
I have the page size set to American Letter (8.5 x 11 inches) which is
about 215 x 279 mm. On screen, the proportions look right. But, the
ruler says that it is about 16.2 cm (162 mm) wide by about 22.8 cm (228
mm) high. Those measurements are vastly different than anything I can
come up with for American Letter.
What am I not understanding?
[
Date Prev][
Date Next] [
Thread Prev][
Thread Next]
[
Thread Index]
[
Date Index]
[
Author Index]