| RGB image to 8 bit ?? [message #17035] |
Thu, 09 September 1999 00:00  |
Richard Tyc
Messages: 69
Registered: June 1999
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Member |
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I am a little confused with the following issue:
I am trying to animate a sequence of images from a IDLgrWindow. The
window image is drawn into a buffer object and then read later to
retrieve it.
ie.
oImgBuf = sState.oBuf->read()
oImgBuf->getproperty,data=animImage
At this point, the image is a bytarr[3,512,512]
In order to load it into Xinteranimate, it needs to be in
bytarr[512,512] form ?
So, how do you convert a RGB triple image into a single 8-bit image
while retaining
the colors (although lower resolution of color)
Do I have to convert each R,G,B triple into a 24 bit integer and then
bytscl it between 0-255 (then load anappropriate color table) ?
I was doing th following which produce a grey scale output (with color
table 0)
Xinteranimate, Frame = nimg, image=reform(animImage[0,*,*])
Thanks
Rich
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Attachment: richt.vcf
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| Re: RGB image to 8 bit ?? [message #17092 is a reply to message #17035] |
Mon, 13 September 1999 00:00  |
Richard Tyc
Messages: 69
Registered: June 1999
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Member |
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I ended up taking your first advice and created Xinteranimate24 which was
very simple. In the CW_Animate_Load procedure I needed to add the true
keyword (I actually created CW_ANIMATE_LOAD24 which Xinteranimate24 calls)
and change some array subscripts on image size where it was grabbing size[1]
and size[2] for xsize and ysize which now requires size[2] and size[3] since
size[1] is 3.
I'll try your idea as well.
Thanks
Rich
David Fanning wrote in message ...
> Liam Gumley (Liam.Gumley@ssec.wisc.edu) writes:
>
>> That said, I also think a 24-bit capable version of XInteranimate would
>> be useful.
>
> You know, as soon as I sent that post yesterday I started worrying
> that I may had gotten it wrong. I remember wanting to display
> 24-bit images in XInteranimate, and I remember looking at the
> code, and I remember that whatever I did was very simple, but
> I couldn't q-u-i-t-e remember what I actually did. So I went
> back this morning and looked at the code. And it turns out
> I did *nothing*!
>
> That's right. XInterAnimate is *already* 24-bit image
> compliant. [Sorry, RSI. :-(]
>
> Actually, it is the fact that XInterAnimate uses the
> Device Copy technique of transferring each image frame
> from its pixmaps to the display window that makes it
> so. This technique doesn't care *what* is in the window,
> it just transfers the "bits", if you like.
>
> So, you use XInterAnimate with 24-bit images, all you have
> to do is load them properly:
>
> XInterAnimate, /ShowLoad, Set=[512, 512, 15]
> For J=0, 14 DO BEGIN
> TV, image24[j], True=1
> XInterAnimate, Frame=j, Window=!D.Window
> EndFor
> XInterAnimate
>
> It is true that you can't use the IMAGE keyword, and that
> is a shame, but this may be the preferred solution anyway,
> since you don't have to do any COLOR_QUANing at all to use
> it.
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Fanning Software Consulting
> Phone: 970-221-0438 E-Mail: davidf@dfanning.com
> Coyote's Guide to IDL Programming: http://www.dfanning.com/
> Toll-Free IDL Book Orders: 1-888-461-0155
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| Re: RGB image to 8 bit ?? [message #17118 is a reply to message #17035] |
Fri, 10 September 1999 00:00 |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Liam Gumley (Liam.Gumley@ssec.wisc.edu) writes:
> That said, I also think a 24-bit capable version of XInteranimate would
> be useful.
You know, as soon as I sent that post yesterday I started worrying
that I may had gotten it wrong. I remember wanting to display
24-bit images in XInteranimate, and I remember looking at the
code, and I remember that whatever I did was very simple, but
I couldn't q-u-i-t-e remember what I actually did. So I went
back this morning and looked at the code. And it turns out
I did *nothing*!
That's right. XInterAnimate is *already* 24-bit image
compliant. [Sorry, RSI. :-(]
Actually, it is the fact that XInterAnimate uses the
Device Copy technique of transferring each image frame
from its pixmaps to the display window that makes it
so. This technique doesn't care *what* is in the window,
it just transfers the "bits", if you like.
So, you use XInterAnimate with 24-bit images, all you have
to do is load them properly:
XInterAnimate, /ShowLoad, Set=[512, 512, 15]
For J=0, 14 DO BEGIN
TV, image24[j], True=1
XInterAnimate, Frame=j, Window=!D.Window
EndFor
XInterAnimate
It is true that you can't use the IMAGE keyword, and that
is a shame, but this may be the preferred solution anyway,
since you don't have to do any COLOR_QUANing at all to use
it.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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| Re: RGB image [message #28783 is a reply to message #17035] |
Fri, 11 January 2002 09:18 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Dick Jackson (dick@d-jackson.com) writes:
> I may be missing something that my learned colleagues Liam and David are
> seeing, but perhaps what you want is simply:
>
> TV, /True, pic
Well, at least until you want PostScript output. :-)
Cheers,
David
--
David W. Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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| Re: RGB image [message #28784 is a reply to message #17035] |
Fri, 11 January 2002 09:03 |
Dick Jackson
Messages: 347
Registered: August 1998
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Senior Member |
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"Dominik Paul" <dpaul@ukl.uni-freiburg.de> wrote in message
news:a1kkuo$170$1@n.ruf.uni-freiburg.de...
> Hi there,
>
> I tried a lot of thinks to display an RGB picture. It is in an array
pic[3,
> 100, 100] with the 3 color channels and the size 100 square 100.
> Does somebody know a posibility to draw this 3 channels in one picture
like
> an real RGB picture.
I may be missing something that my learned colleagues Liam and David are
seeing, but perhaps what you want is simply:
TV, /True, pic
Cheers,
--
-Dick
Dick Jackson / dick@d-jackson.com
D-Jackson Software Consulting / http://www.d-jackson.com
Calgary, Alberta, Canada / +1-403-242-7398 / Fax: 241-7392
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| Re: RGB image [message #28802 is a reply to message #17035] |
Thu, 10 January 2002 12:27 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Dominik Paul (dpaul@ukl.uni-freiburg.de) writes:
> I tried a lot of thinks to display an RGB picture. It is in an array pic[3,
> 100, 100] with the 3 color channels and the size 100 square 100.
> Does somebody know a posibility to draw this 3 channels in one picture like
> an real RGB picture.
> Help would be very nice.
I would suggest one of these methods:
TVImage, picture
IMDisp, picture
PlotImage, picture
You can find them in the usual places. :-)
Cheers,
David
--
David W. Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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