Re: Rotate image without perspective change?


"Michael J. Mahon" <mjmahon@xxxxxxx> wrote in message
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spamlet wrote:
"ric" <publicmail@xxxxxxxxxxxxxxxx> wrote in message
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On Oct 2, 3:06 am, "Yves Alarie" <rd50@@pitt.edu> wrote:

You cannot set your monitor for the x and y scales to be the same.
But, as you wrote, let us know if you can.

"spamlet" <spam.mores...@xxxxxxxxxxxxxxx> wrote in message

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Thanks for the feedback Yves (and apologies to John for sounding
ungrateful),

Actually, the print is rotated but still the right perspective:
I scanned it in landscape to reduce scanning time and file size; then
rotated it on pc to its proper upright position, whereupon it looked
too
tall. Then printing it, it came out in the corrected upright position,
with the right perspective.

So I would say the monitor needs adjusting so that the x & y scales are
the same.
Another alternative is that, say Photo Editor, has an underlying grid
which is not square (Which seems to be the way Word comes by the way -
and, boy does the setting take some finding!).

I have not looked into the screen set up yet, but will let you know.
Thanks again,

S

"Yves Alarie" <rd50@@pitt.edu> wrote in message
news:uvzPdl4AIHA.4612@xxxxxxxxxxxxxxxxxxxxxxx

The answer is simple.
You are right, the print will be the right size and perspective.
However, look at the print, it is not rotated. You rotate the print by
hand to see the picture.
You can do the same thing if you have a monitor with a pivot. You
rotate
the monitor, not the picture. Same as rotating a print!
If you can't rotate the monitor, you rotate the picture. The viewing
software must now fit the same aspect ratio from the long side (width)
to
the short side (height) of your monitor. So, in effect it "zooms in"
but
still keeps everything in the picture in proportion.
The only time you can rotate and not have this change in size or
perspective is if you have a camera or scan a picture with and aspect
ratio of 1.0, that is a perfect square.
"spamlet" <spam.mores...@xxxxxxxxxxxxxxx> wrote in message
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"John Inzer" <oo...@xxxxxxxxxx> wrote:

Yes, the page is rotated. I think you are
expecting all images to be Landscape
orientation (wider that they are tall) but
that is just not the reality of digital images.
You will find that you always have an
assortment of both.

Er, obviously I'm not expecting all my pics to have the same
orientation
or I would not have been needing to rotate them on the pc to
compensate
for me turning the camera! I would just like them not to appear
longer/taller when they are turned.

Since you are not experiencing distortion...
the "different issue does not apply.

So you are saying that things are meant to look distorted when one
rotates the page!

Don't worry, I'll look into it myself: discovering that the print is
the
right size, gives me something to go on.

Cheers,

S- Hide quoted text -

- Show quoted text -

I might be missing something here, but isn't the obvious answer that
it's a problem with the resolution of your monitor? E.g. if the
native res is something like 1440x768, and you have it set to 1024x768
or similar?
Find out the native resolution of your monitor (or post make/model
here) and check your desktop settings are correct...

Ric


Hi Ric,

The Dell E171FP monitor came with our Dell system.

The settings buttons on the front, have toggles for centring the screen
and
for moving the settings menu about, but not, apparently, a simple picture
height adjustment - which would probably have done the job!

The menu furnishes me with the info that I am running it at 1024 x 768
and
refresh at 75Hz; whereas it says the 'optimum' is 1280 x 1024 at 60Hz. A
quick dividing, gives the different aspect ratios of .75 v .8 - which
seems
remarkably similar to the difference I am noting in the pictures. So it
looks like you are on the case.

Going into the desktop properties menus I find that one tag on the
advanced
properties has the title 'Can't find requested string'. This looks like
the
one that should have had the monitor information on it...

The XP monitor resolution settings slider gives me the option of
1280x1024,
and this would give me oodles of desktop room, but tiny icons, and dinky
windows with tiny writing in. There does not seem to be another setting
with the same ratio as this 'optimum' (Or is there somewhere to specify
measurements not on the graduated scale?) - though I do discover that I
can
have the same ratio as current, but with more room, and only a small loss
of
size, with the 1152 x 864 setting. But this would, presumably still give
me
the distortion on rotation.

Further delving and I found the DPI settings with an option to increase
from 96 to 120 if my icons are 'too small' with the optimum, screen
resolution. Anti intuitive as this is - I would have expected more pixels
to the inch to make things even smaller! - I gave it a go, but there was
still no way I could get all the windows and dialogues a decent size and
with legible text on, no matter how much I tweaked the customise desktop
settings. Had to system restore in the end...

What would have been wrong with having a simple TV type picture height
screw,
one has to ask!

These are the days of digital displays, and, although they can resample
from one size to another, the best results are always obtained by using
the "native" resolution of the monitor--in your case 1280x1024.

The XP desktop "Properties" box (right-click on an empty space on the
desktop), under the tab marked "Appearance", has a "Font size" selection
box offering "Normal", "Large Fonts", and "Extra Large Fonts". If you
select either of the latter two selections you should get a readable
desktop display.

BTW, native resolution will *almost always* be perfectly square pixels.

-michael

NadaPong: Network game demo for Apple II computers!
Home page: http://members.aol.com/MJMahon/

"The wastebasket is our most important design
tool--and it's seriously underused."


Thanks Michael, but I've been through all that:

Every different programme responds differently to changes in text size, and
this is not related to accompanying changes in window size. Increasing the
font size makes some fonts more legible and some fonts less. The trouble
with the 'optimum' is that the letters are all very fine and difficult to
resolve unless one boldens them, or makes them much too big for the windows
in which they run. The 'advanced' options do not provide any facility for
adjusting all the various window sizes when one adjusts the text either.

On the face of it, upping the DPI setting ought to do the job for
everything; and increasing to 150% does roughly duplicate the original
window sizes, but then all the text looks awful and much too crowded in the
windows - for example: messages in O or OE are all crammed together.

I've tried quite a few hours of experiments on this, and always end up
having to do a system restore.
Shame, because the only things that do behave themselves at the 'optimum'
are the pictures, which do indeed then maintain their perspective on
rotation!

I did discover that the dedicated Dell monitor driver had not been loaded at
system set up. But adding this has unfortunately, made no difference.

Nevertheless: thanks for your interest.

Cheers,

S


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