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[McIDAS #FIS-581939]: Geocolor enhancement table

Hi Kwan,

re:
> I have just looked into the COMBINE command.  From what I can understand,
> it is a screen/frame memory addition/subtraction method, and the resulting
> product is saved as an image graphic file (e.g. GIF).

Correct.

re:
> Can it be saved as a McIDAS AREA file?

No, not that I am aware of.

re:
> I have some McIDAS AREA files which I know are Geocolor images.  In this
> case, I would need an enhancement table in order to display the images with
> the proper geocolor map, right?

Yes, but I know of no way to store a RGB image in an AREA file.  Colorization
of images stored in any of the image formats supported in McIDAS (e.g., AREA,
GINI, NEXR, etc.) is accomplished via association with an enhancement, but
the result will not be anywhere close to the images you found on the CIRA
web site.

Back to one of your earlier questions: we do not have a "geocolor" enhancement.

Since I am not familiar with CIRA's "geocolor" technique, I did a Google (tm)
search and found a number of hits the first of which was informative:

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjQiqmhyPrMAhVIVlIKHUwpDLsQFggfMAA&url=https%3A%2F%2Fcimss.ssec.wisc.edu%2Fgoes_r%2Fproving-ground%2FCIRA_Proving_Ground_Products.pdf&usg=AFQjCNGGS9xuIPU0QohT51J_z7mAuEDcfg

> Kwan
> 
> On Thu, May 26, 2016 at 6:32 PM, Kwan yin Kong <address@hidden>
> wrote:
> 
> > Amazing concept!
> >
> > address@hidden> wrote:
> >
> >> Hi Kwan,
> >>
> >> re:
> >> > I am puzzled.  Are the colors on these images not produced using an
> >> > enhancement table at all?
> >>
> >> For the RGB images like the one depicted in the following URL, the answer
> >> is no:
> >>
> >>
> >> http://rammb.cira.colostate.edu/ramsdis/online/images/latest_hi_res/himawari-8/full_disk_ahi_true_color.jpg
> >>
> >> For the images like a couple show as links in the following URL, the
> >> answer
> >> is yes:
> >>
> >> http://rammb.cira.colostate.edu/ramsdis/online/himawari-8.asp
> >>
> >> American Samoa Band 13 (10.4 µm)
> >>
> >> http://rammb.cira.colostate.edu/ramsdis/online/images/latest/himawari-8/himawari-8_band_13_sector_07.gif
> >>
> >> The RGB images are created, for instance, by driving the red gun with an
> >> image
> >> that measured in the visible red portion of the spectrum; the green gun
> >> driven by an image in the visible green portion of the spectrum; and the
> >> blue gun driven by an image in the visible blue portion of the spectrum.
> >>
> >> I am attaching a pseudo-true color image created by the IDV from MSG 10
> >> imagery for an example (note that I took no pains to make a high
> >> resolution
> >> RGB composite, so the example looks crude).
> >>
> >>
> >> > Kwan
> >> >
> >> > address@hidden> wrote:
> >> >
> >> > > Hi Kwan,
> >> > >
> >> > > re:
> >> > > > So, do you know if these Himawari Geocolor images at Colorado States
> >> > > > created using McIDAS?
> >> > > >
> >> > > > http://rammb.cira.colostate.edu/ramsdis/online/himawari-8.asp
> >> > >
> >> > > Some of the images shown on this page were definitely produced with
> >> > > McIDAS-X.
> >> > >
> >> > > re:
> >> > > >
> >> > >
> >> http://rammb.cira.colostate.edu/ramsdis/online/images/latest_hi_res/himawari-8/full_disk_ahi_true_color.jpg
> >> > >
> >> > > It is hard to tell if this image was created with McIDAS-X, McIDAS-V
> >> or
> >> > > some
> >> > > other software package.  I would guess that it was produced with
> >> McIDAS-V.
> >> > >
> >> > > Cheers,
> >> > >
> >> > > Tom
> >> > > --
> >> > >
> >> > >
> >> ****************************************************************************
> >> > > Unidata User Support                                    UCAR Unidata
> >> > > Program
> >> > > (303) 497-8642                                                 P.O.
> >> Box
> >> > > 3000
> >> > > address@hidden                                   Boulder,
> >> CO
> >> > > 80307
> >> > >
> >> > >
> >> ----------------------------------------------------------------------------
> >> > > Unidata HomePage                       http://www.unidata.ucar.edu
> >> > >
> >> > >
> >> ****************************************************************************
> >> > >
> >> > >
> >> > > Ticket Details
> >> > > ===================
> >> > > Ticket ID: FIS-581939
> >> > > Department: Support McIDAS
> >> > > Priority: Normal
> >> > > Status: Closed
> >> > > ===================
> >> > > NOTE: All email exchanges with Unidata User Support are recorded in
> >> the
> >> > > Unidata inquiry tracking system and then made publicly available
> >> through
> >> > > the web.  If you do not want to have your interactions made available
> >> in
> >> > > this way, you must let us know in each email you send to us.
> >> > >
> >> > >
> >> > >
> >> >
> >> >
> >>
> >> Cheers,
> >>
> >> Tom
> >> --
> >>
> >> ****************************************************************************
> >> Unidata User Support                                    UCAR Unidata
> >> Program
> >> (303) 497-8642                                                 P.O. Box
> >> 3000
> >> address@hidden                                   Boulder, CO
> >> 80307
> >>
> >> ----------------------------------------------------------------------------
> >> Unidata HomePage                       http://www.unidata.ucar.edu
> >>
> >> ****************************************************************************
> >>
> >>
> >> Ticket Details
> >> ===================
> >> Ticket ID: FIS-581939
> >> Department: Support McIDAS
> >> Priority: Normal
> >> Status: Closed
> >> ===================
> >> NOTE: All email exchanges with Unidata User Support are recorded in the
> >> Unidata inquiry tracking system and then made publicly available through
> >> the web.  If you do not want to have your interactions made available in
> >> this way, you must let us know in each email you send to us.
> >>
> >
> >
> 
> 

Cheers,

Tom
--
****************************************************************************
Unidata User Support                                    UCAR Unidata Program
(303) 497-8642                                                 P.O. Box 3000
address@hidden                                   Boulder, CO 80307
----------------------------------------------------------------------------
Unidata HomePage                       http://www.unidata.ucar.edu
****************************************************************************


Ticket Details
===================
Ticket ID: FIS-581939
Department: Support McIDAS
Priority: Normal
Status: Closed
===================
NOTE: All email exchanges with Unidata User Support are recorded in the Unidata 
inquiry tracking system and then made publicly available through the web.  If 
you do not want to have your interactions made available in this way, you must 
let us know in each email you send to us.