Re: [Gimp-user] Opening raw images in GIMP

[Rick Kline <rick kline ms>]

Thanks, Guy. 

Ha ha. No big deal re: the job. I only did it for 30 years.

I’m capable of doing command line stuff, but not a huge fan. Ran into an error trying to install UFRaw and 
ground pretty quickly to a halt.

I did send Emily an email telling her that I was able to open the Phoenix .img image with NASAview 3.18.0 and 
save as a GIF. JPEG is another NASAview save option, but I figure she’d want to go with the least lossy 
format available. 

I’ll pass the info along to her.

Best,
Rick

 * * ** *** ***** ******** ************* ********************* 
It’s better to wave at a stranger than to ignore a friend
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> On Jan 30, 2019, at 1:44 PM, Guy Stalnaker <jimmyg521 gmail com> wrote:
>
> LOL
>
> It pays to make no assumptions about folks one meets online (in forums, Twitter, etc.)
>
> Rick Kline
> Data Manager (ret.) <-- !
> Spacecraft Planetary Imaging Facility, Cornell University <-- !!!!
>
> Indeed :-)
>
> I followed Stave Liam's method and it does mostly work (using Emily Lakdawalla's test image I saw mostly 
> what she sees in her Photoshop process though there is "missing" data--you'll see what I mean if you do 
> this). Biggest issue is that GIMP, as she says, makes assumptions about data encoding and the only options 
> in the GIMP open dialog where you specify information about the image provides no options that seem 
> relevant to the way the data is encoded in the .img file.
>
> Liam mentions G'MIC and you may have more success there. It, like GIMP, is free and, more importantly, it 
> has far more options related to image data content (it's written by imaging data scientists for use in 
> manipulating scientific image data). And it's scriptable already! A steep learning curve for someone like 
> me with no background in such things, but for you and your background it may be just what you're looking 
> for (and I can attest that G'MIC developers are veyr nice people who are approachable if you have 
> questions). If you're comfortable with a command line (and I can't imagine you are not given your 
> background) G'MIC may save you a fair bit of time.
>
> Regards,
>
> GuyS
>
> Guy Stalnaker
> jimmyg521 gmail com <mailto:jimmyg521 gmail com>
>
> On Wed, Jan 30, 2019 at 12:18 PM Rick Kline <rick kline ms <mailto:rick kline ms>> wrote:
> Thanks, Liam,
>
> I like the “change the file type” method best, because there’s no messing with the contents. Easy enough to 
> find header size (offset) - look at the file info, Lines x Samples x bytes (16 bit image = 2 bytes). 
> Subtract result from actual file size and you have the header size.
>
> In PDS images, the ^image (“hat image”) parameter tells what byte the image starts on. I used to use that 
> in P’shop when importing uncompressed (.img) PDS images. Even wrote some scripts for P’shop and NIH Image 
> (now Image J) to import Viking Orbiter, Viking Lander, and Magellan images that used ^image. Those scripts 
> are probably long gone, and I’m retired from the Astro job. May have to contact my also retired work friend 
> known as Dr. Bithead to get some help with script writing for GIMP.
>
> I’ll give the .data trick a try.
>
> Best,
>
> Rick Kline
> Data Manager (ret.)
> Spacecraft Planetary Imaging Facility, Cornell University
>
>  * * ** *** ***** ******** ************* ********************* 
> It’s better to wave at a stranger than to ignore a friend
>  * * ** *** ***** ******** ************* ********************* 
>
>
>
> > On Jan 29, 2019, at 9:42 PM, Liam R E Quin <liam holoweb net <mailto:liam holoweb net>> wrote:
> >
> > On Tue, 2019-01-29 at 11:43 -0500, Rick Kline wrote:
> > > Hi,
> > >
> > > Some folks working with planetary data would like to use raw PDS 
> >
> > http://areo.info/gimp/ <http://areo.info/gimp/> may help. It needs to be updated to handle 16-
> > bit images now that GIMP can open them.
> >
> > it’s also possible to use ImageMagick or g'mic to conver the VICAR/PDS
> > raw images to PNG, although you may need to use a hex (or octal) editor
> > to work out where the image starts exactly. You can also name the image
> > something.data and open it in GIMP, and the pop-up window will ask you
> > for an offest and the format.
> >
> > Hope this helps,
> >
> > slave liam
> >
> >
> > -- 
> > Liam Quin - web slave for https://www.fromoldbooks.org/ <https://www.fromoldbooks.org/>
> > with fabulous vintage art and fascinating texts to read.
> > Click here to have the slave beaten.
>
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