| Re: image size [message #9964] |
Fri, 19 September 1997 00:00 |
pit
Messages: 92
Registered: January 1996
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Member |
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In article <342128D8.195E@ndsi.ibb.ch>,
Nicolas Stern <ih6stn@ndsi.ibb.ch> writes:
> Thanks for the answer !
>
> In the meantime: the artefact must be a Paint Shop Pro - specific
> effect: the same file has the correct dimension when opened with some
> other image processing tool (AdobePhotoshop).
>
> BTW , I'm running IDL5.0 under NT4.0. The syntax specifications
> (write_tiff, []) are new in IDL5.0.
Ooops, just recognized that. Pretty way of writing not backward
compatible code :-(
FVIW, I tested again (Solaris 2.4, IDL 5.0, XV) and its OK, too.
So it's really a problem of PSP (and obviously PowerPoint, as Dave seems
to have the same problem).
Peter
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~
Peter "Pit" Suetterlin http://www.uni-sw.gwdg.de/~pit
Universitaets-Sternwarte Goettingen
Tel.: +49 551 39-5048 pit@uni-sw.gwdg.de
-- * -- * ...-- * -- * ...-- * -- * ...-- * -- * ...-- * -- * ...-- * --
Come and see the stars! http://www.kis.uni-freiburg.de/~ps/SFB
Sternfreunde Breisgau e.V. Tel.: +49 7641 3492
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| Re: image size [message #9971 is a reply to message #9964] |
Thu, 18 September 1997 00:00  |
David Foster
Messages: 341
Registered: January 1996
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Senior Member |
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Peter Suetterlin wrote:
>
> In article <34200F01.C40@ndsi.ibb.ch>,
> Nicolas Stern <ih6stn@ndsi.ibb.ch> writes:
>
>> Now, when I open the test.tif image with an image processing soft (PSP,
>> v4.0), the image size is 491*491 ! Saving a 512*512 byte array as a
>> grayscale image doesn't produce a similar artefact ! (I suppose the
>> problem does not come from IDL.)
I've noticed a similar problem saving .tif files in IDL and trying to
read them in PowerPoint (PC Windows, ugghh!). The dimensions get
screwed up. Perhaps this is a peculiarity with the .tif image
format.
Our system is Solaris 2.5, IDL 5.0 (noticed this with 4.0.1 also).
Anyone else have this problem?
Dave
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~
David S. Foster Univ. of California, San Diego
Programmer/Analyst Brain Image Analysis Laboratory
foster@bial1.ucsd.edu Department of Psychiatry
(619) 622-5892 8950 Via La Jolla Drive, Suite 2240
La Jolla, CA 92037
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| Re: image size [message #9973 is a reply to message #9971] |
Thu, 18 September 1997 00:00 |
Nicolas Stern
Messages: 2
Registered: September 1997
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Junior Member |
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Thanks for the answer !
In the meantime: the artefact must be a Paint Shop Pro - specific
effect: the same file has the correct dimension when opened with some
other image processing tool (AdobePhotoshop).
BTW , I'm running IDL5.0 under NT4.0. The syntax specifications
(write_tiff, []) are new in IDL5.0.
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| Re: image size [message #9975 is a reply to message #9971] |
Thu, 18 September 1997 00:00 |
pit
Messages: 92
Registered: January 1996
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Member |
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In article <34200F01.C40@ndsi.ibb.ch>,
Nicolas Stern <ih6stn@ndsi.ibb.ch> writes:
> Did anyone see something similar happen :
> I use write_tiff to save arrays as true color image.
>
> array_1=bytarr(512,512)
> array_2=bytarr(512,512)
> array_3=bytarr(512,512)
> array_1[*,*]=255
> array_2[*,*]=10
> array_3[*,*]=10
you mean array_?(*,*)
> WRITE_TIFF, 'test.tif',
> RED=array_1,GREEN=array_2,BLUE=array_2,PLANARCONFIG = 2
I assume you use tiff_write!?
> Now, when I open the test.tif image with an image processing soft (PSP,
> v4.0), the image size is 491*491 ! Saving a 512*512 byte array as a
> grayscale image doesn't produce a similar artefact ! (I suppose the
> problem does not come from IDL.)
Tested it (Linux, IDL 4.0, viewer XV). No problems at all, correct
sizes and correct color.
What System are you using?
Peter
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~
Peter "Pit" Suetterlin http://www.uni-sw.gwdg.de/~pit
Universitaets-Sternwarte Goettingen
Tel.: +49 551 39-5048 pit@uni-sw.gwdg.de
-- * -- * ...-- * -- * ...-- * -- * ...-- * -- * ...-- * -- * ...-- * --
Come and see the stars! http://www.kis.uni-freiburg.de/~ps/SFB
Sternfreunde Breisgau e.V. Tel.: +49 7641 3492
____________________________________________________________ ______________
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