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Re: Just trying to import an image
*To*: mathgroup at smc.vnet.net
*Subject*: [mg44632] Re: Just trying to import an image
*From*: Bob Harris <nitlion at mindspring.com>
*Date*: Tue, 18 Nov 2003 06:42:06 -0500 (EST)
*References*: <bonnfg$h8i$1@smc.vnet.net> <bopcu5$opr$1@smc.vnet.net> <200311121301.IAA12554@smc.vnet.net> <bovev3$l04$1@smc.vnet.net> <bp22po$20t$1@smc.vnet.net>
*Sender*: owner-wri-mathgroup at wolfram.com
Howdy,
Does anyone here have additional ideas on this?
Since it appears there will be no way to get mathematica to load a .gif
image on my system, what other options do I have to load in an image so I an
try doing some image processing on it? I am capable of writing a simple C
program to convert the image into some other format. For example, I could
convert it to a one-byte per pixel gray level image, with no other
information in the file. If I did that, how might I load it into
mathematica.
I'm asking here because wolfram customer service won't help me. I really
would like to do image processing with this package. Please help me if you
can.
Bob H
> From: Bob Harris <nitlion at mindspring.com>
To: mathgroup at smc.vnet.net
> Organization: Steven M. Christensen and Associates, Inc and MathTensor, Inc.
> Newsgroups: comp.soft-sys.math.mathematica
> Date: Fri, 14 Nov 2003 08:12:40 +0000 (UTC)
> Subject: [mg44632] Re: Just trying to import an image
>
> Yas wrote:
>> Maybe put the path to the conversion executables to your path via
>>
>> AppendTo[$Path,
>> "Path_To_Conversion_Executables_in_proper_syntax_for_your_platform"]
>
> Thanks for the idea. Have now tried that, but get the same error message.
> Am patterning my path syntax after what is already in the $path variable.
> Pretty sure I specified the right path, but in case not, I moved the file
> (gif.exe) to top level of disk and tried specifying that. Same result.
>
>> I am surprised that the conversion filters can't be found.
>
> Well, that makes two of us! Am wondering if there is a customer service
> site I can post this issue for someone at wolfram.
>
> I suppose I can write a tiny app in C that will to convert my .gif image
> into something else mathematica could read without a converter. Moot point
> now though. The project was due today. I ended up doing it in another system
> on
> campus. One advantage I had hoped for, using mathematica, was that I have
> it at home and thus can accomplish something even when the school labs are
> closed from midnight to 8). Plus I'm more familiar with Mathematica than
> another system, so once I got past the image load problem I was expecting to
> make
> faster progress.
>
> Thanks, in any case,
> Bob H
>
>> From: Yasvir Tesiram <yat at omrf.ouhsc.edu>
To: mathgroup at smc.vnet.net
>> Date: Wed, 12 Nov 2003 12:43:33 -0600
>> To: mathgroup at smc.vnet.net
>> Cc: Bob Harris <nitlion at mindspring.com>
>> Subject: [mg44632] Re: Re: Just trying to import an image
>>
>> Maybe put the path to the conversion executables to your path via
>>
>> AppendTo[$Path,
>> "Path_To_Conversion_Executables_in_proper_syntax_for_your_platform"]
>>
>> If this works, you can make the change permanent in Preferences. I am
>> surprised that the conversion filters can't be found.
>>
>> Yas
>>
>>
>> On Nov 12, 2003, at 7:01 AM, Bob Harris wrote:
>>
>>> Howdy, Steven,
>>>
>>> Thanks for the idea. But it seems that the problem is that Mathematica
>>> can't find the converter. I've already figured out how to make it
>>> find the
>>> image.
>>>
>>> Bob H
>>>
>>>> From: "Steven Shippee" <slshippee at comcast.net>
To: mathgroup at smc.vnet.net
>>> To: mathgroup at smc.vnet.net
>>>> Organization: Comcast Online
>>>> Newsgroups: comp.soft-sys.math.mathematica
>>>> Date: Tue, 11 Nov 2003 01:10:29 +0000 (UTC)
>>>> Subject: [mg44632] Re: Just trying to import an image
>>>>
>>>> To make it easy to debug, try putting the file (the "image") in a root
>>>> directory somewhere (of your "c" drive or your "d" drive), and also
>>>> ensure
>>>> it has no spaces in the file name, for example, use something like
>>>> c:\practice.jpg or c:\practice.bmp.
>>>>
>>>> Then you could run the command
>>>>
>>>> myimage=Import["c:\practice.jpg"];
>>>>
>>>> and manipulate myimage from there.
>>>>
>>>> Steven
>>>>
>>>> shippee at jcs.mil
>>>>
>>>>
>>>>
>>>> "Bob Harris" <nitlion at mindspring.com> wrote in message
>>>> news:bonnfg$h8i$1 at smc.vnet.net...
>>>>> Howdy,
>>>>>
>>>>> Have an assignment in an computer vision class I'm taking. Thought
>>>>> I'd
>>>> try
>>>>> fiddling around with it in Mathematica. Have run into the second or
>>>>> third
>>>>> brick wall, just trying to bring an image into Mathematica. Am in
>>>>> need of
>>>>> help.
>>>>>
>>>>> For starters, I found Import[] in the big book and tried it:
>>>>> Import ["vl100.gif"]
>>>>> The file vl100.gif is in the same directory as the mathematica
>>>>> notebook
>>>> that
>>>>> I launched. But that seems not to be one of the places mathematica
>>>>> looks.
>>>>> So I just got a file not found error. So be it.
>>>>>
>>>>> I figured there must be a way to convince mathematica to look for
>>>>> the file
>>>>> where e file is. After stumbling around for a while in the book and
>>>>> in
>>>> the
>>>>> help browser, I finally found the SetDirectory command. So looking
>>>>> at the
>>>>> format of file paths in $Path, I did
>>>>> SetDirectory["Kablooie:ClassesS:VisionS:Project4S"]
>>>>> which is the path to the directory containing the file.
>>>>>
>>>>> So then I tried
>>>>> Import ["vl100.gif"]
>>>>> again, and I get
>>>>> Experimental`RegisterConverter::noexe: Could not find the
>>>>> executable GIF.exe in any of { <<65>>, <<74>>, <<83>>, GIF.exe}.
>>>>>
>>>>> Now, I'm running this using mathematica 4.0.1.0 for the Mac on a
>>>>> PowerMac
>>>> G3
>>>>> running OS 9.0.4. Yes, I know I haven't upgraded in a while, but it
>>>>> sure
>>>>> seems like what I'm trying to do is supposed to work on my
>>>>> configuration.
>>>>>
>>>>> The error message suggests that it doesn't have the executable code
>>>>> to
>>>>> handle gif images. I tried .pgm format and got the same result.
>>>>> Since
>>>> both
>>>>> are listed in the big book I figured it's pointless to try other
>>>>> formats.
>>>>> Those two should've worked.
>>>>>
>>>>> I did a search of my hard drive and I do find a gif.exe (and hdf.exe,
>>>>> jpeg.exe, pnm.exe, and tiff.exe) in the folder
>>>>> ... MathematicaS:SystemFiles:Converters:Binaries:PowerMac
>>>>> So it seems like it's got 'em, and it's just not looking for them.
>>>>>
>>>>> Can anyone point me toward a way to get this working?
>>>>>
>>>>> Thanks for any help,
>>>>> Bob H
>>>>>
>>>>
>>
>
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