From cgohlke at uci.edu  Fri Mar  2 15:57:54 2012
From: cgohlke at uci.edu (Christoph Gohlke)
Date: Fri, 02 Mar 2012 06:57:54 -0800
Subject: [Image-SIG] Problem installing PIL
In-Reply-To: <CAFFWVEyAUTNLgWwuJ6khwgDGjixJ2mJvueKpntq2-XEWTHQkwA@mail.gmail.com>
References: <CAFFWVEyAUTNLgWwuJ6khwgDGjixJ2mJvueKpntq2-XEWTHQkwA@mail.gmail.com>
Message-ID: <4F50DFF2.7070600@uci.edu>



On 2/26/2012 5:41 AM, David Craig wrote:
> Hi, I recently installed basemap and python imaging library on my
> laptop. I have an i686 machine with fedora 16 on it. I just tried some
> test plots and basemap seems to work fine but according to the
> documentation to use the bluemarble(), etopo(), shadedrelief() and
> warpimage() instance methods I need PIL. SO I installed it via yum,
>
> $ sudo yum install python-imaging.i686
>
> however only the bluemarble method works. If I try any of the others I
> get the following error.
>
> AttributeError                            Traceback (most recent call last)
> /usr/lib/python2.7/site-packages/IPython/utils/py3compat.pyc in
> execfile(fname, *where)
>      173             else:
>      174                 filename = fname
> --> 175             __builtin__.execfile(filename, *where)
>
> /home/davcra/Desktop/python_scripts/blue_marble.py in <module>()
>       10
>       11
> ---> 12 m.shadedrelief()
>       13 plt.show()
>
> AttributeError: 'Basemap' object has no attribute 'shadedrelief'
>
> Anyone know what I did wrong????
> Thanks
> David
>
>

There's a reply to your question on the matplotlib-users list: 
<http://sourceforge.net/mailarchive/message.php?msg_id=28892563>

Christoph

From rowen at uw.edu  Mon Mar  5 20:52:06 2012
From: rowen at uw.edu (Russell E. Owen)
Date: Mon, 05 Mar 2012 11:52:06 -0800
Subject: [Image-SIG] How do you install PIL?
References: <5B130E73-2B05-4BBE-8BC0-FD72CCE61399@mac.com>
Message-ID: <rowen-B0621B.11520605032012@news.gmane.org>

In article <5B130E73-2B05-4BBE-8BC0-FD72CCE61399 at mac.com>,
 Barry Barnett <b.family at mac.com> wrote:

> Hi. I'm trying to install pyTivo on my Mac and it says it needs the PIL for 
> publish photos on my TIvo. Which version do I download and how do I install 
> it? I'm running a Macbook Pro with Intel core i7 processor. Thanks. 

There is a binary installer fpr PIL available here:
<http://www.astro.washington.edu/users/rowen/python/>
but it is only compatible with python.org's 32-bit Python 2.7 (the one 
that is backward compatible back to Mac OS X 10.3, not the one that is 
10.6-or-later).

Other options:
- Build it from source (not a lot of fun, but quite doable)
- Use python from some other source, such as fink, MacPorts or 
Enthought. I suspect most or all of those have a PIL available, but 
check first!

-- Russell


From alec.taylor6 at gmail.com  Wed Mar 14 11:25:48 2012
From: alec.taylor6 at gmail.com (Alec Taylor)
Date: Wed, 14 Mar 2012 21:25:48 +1100
Subject: [Image-SIG] PIL fails to install in virtualenv of one volume
Message-ID: <CAO+9iGemrjd3=WSYPouX6chqj_5fMyP0o6QMY1hApsZph6iShQ@mail.gmail.com>

For some reason I cannot get PIL to install in a virtualenv on my F:
drive, but it works fine on my C: drive.

#########

F:\Users\Alec Taylor\Projects>virtualenv env_PIL && env_PIL\Scripts\activate
New python executable in env_PIL\Scripts\python.exe
Installing setuptools................done.
Installing pip....................done.
(env_PIL) F:\Users\Alec Taylor\Projects>pip install PIL
Output: http://pastebin.com/VNR6rjLh
[Failure]

#########
So I thought it might've erred due to spaces in the path, since this worked:
#########

C:\workingdir>virtualenv env_PIL && env_PIL\Scripts\activate
New python executable in env_PIL\Scripts\python.exe
Installing setuptools................done.
Installing pip....................done.
(env_PIL) C:\workingdir>pip install PIL

Output: http://pastebin.com/D1exTTCU
[Success]

#########
But when trying with spaces in the path on the C: it worked fine:
#########

C:\workingdir>mkdir "dir space\a" && cd "dir space\a"

C:\workingdir\dir space\a>virtualenv env_PIL && env_PIL\Scripts\activate
New python executable in env_PIL\Scripts\python.exe
Installing setuptools................done.
Installing pip....................done.
(env_PIL) C:\workingdir\dir space\a>pip install PIL

Output: http://pastebin.com/8iZpEkum
[Success]

#########

Also, PIL is the only thing which can't install in a virtualenv on the
other volume, other things which need to link+compile; such as
pycrypto, install without issue.

Why isn't PIL installing in any virtualenv on my other drive?

Thanks for all suggestions,

Alec Taylor

PS: In the meantime I will build all my virtualenvs on my C:

From praveenchitneedi at gmail.com  Wed Mar 14 16:35:30 2012
From: praveenchitneedi at gmail.com (praveen krishna)
Date: Wed, 14 Mar 2012 16:35:30 +0100
Subject: [Image-SIG] Unable to install Pil in windows7
Message-ID: <CAMzV_h108iLAFz1F=6Cn61Ti1wBih+3m9erQ46qtK71Avqk6gw@mail.gmail.com>

Hi,
  I tried to install pil in windows but it is not getting installed and
generating following errors which are attached to this mailing list .I have
installed Python 2.7 and I tried to perform registy by following the script
in this link http://effbot.org/zone/python-register.htm but is giving error
    *** Unable to register!
 *** You probably have another Python installation!


 can u please help me in sorting this and to install pil in my system to
run web2py application .
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From glez_b at comunidad.unam.mx  Fri Mar 16 19:52:19 2012
From: glez_b at comunidad.unam.mx (Boris Vladimir Comi)
Date: Fri, 16 Mar 2012 18:52:19 +0000
Subject: [Image-SIG] Help for to do a script
Message-ID: <BAY155-W607AF2E8CDDE2916446B1AA35F0@phx.gbl>


Hello, I am writing to request your help in the realization of a script. I am new to this and I'm just learning the wonderful world of python and this has made me a little difficult.

Briefly I commented what I intend to do:

I detect a class of atmospheric phenomena known as Mesoscale Convective Systems (MCS). To accomplish this, I have a database of satellites by 2004, every half hour. These data were downloaded from the server: unidata2.ssec.wisc.edu and data format is: 200404271515.goes12ir (Area Format)

The first thing to do is detect a convective system in the satellite data, using the following characteristics:

MCS Criteria

Minimum Size: Continuous cold cloud shield (TIR <219 K and Must Have an area> 34000 km ?)

Duration: Definition of Minimum Size Must Be A Period of Exceed or ? 3h

Initiation: Time When the Minimum Size is met

Maximum Extention: Time when the continuous cloud shield (TIR <219 K) is at its maximum size

Termination: When the Time Minimun Size is not satisfied

where: Temperature Infrarred is TIR

To achieve this, first I created a script in python to identify a MCS in my database (script in attached)

The script is run from a linux terminal ($ python TIR.py), to run it I get the following error:

File "/home/mcidasv/JYTHON/TIR.py", line 22
    count = count + 1;
        ^
SyntaxError: invalid syntax

 If anyone can help me with this script or any idea you suggest to improve it, I would greatly appreciate.



Boris Vladimir Comi Gonzalez
Universidad Nacional Aut?noma de M?xico
Grupo de Tormentas Convecivas
 		 	   		  
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From donn.ingle at gmail.com  Sat Mar 17 11:11:44 2012
From: donn.ingle at gmail.com (donn)
Date: Sat, 17 Mar 2012 12:11:44 +0200
Subject: [Image-SIG] Help for to do a script
In-Reply-To: <BAY155-W607AF2E8CDDE2916446B1AA35F0@phx.gbl>
References: <BAY155-W607AF2E8CDDE2916446B1AA35F0@phx.gbl>
Message-ID: <4F646360.90607@gmail.com>

On 16/03/2012 20:52, Boris Vladimir Comi wrote:
>                if (data[0][i][j]>  199.5 and (data[0][i][j]<  200.5
>                    count = count + 1;

Looks like the if command does not close properly. It needs a brackets 
and a colon.

Also, you don't need to use semi-colons, at all.

HTH
/d

From chris.barker at noaa.gov  Mon Mar 19 22:53:08 2012
From: chris.barker at noaa.gov (Chris Barker)
Date: Mon, 19 Mar 2012 14:53:08 -0700
Subject: [Image-SIG] Help for to do a script
In-Reply-To: <BAY155-W607AF2E8CDDE2916446B1AA35F0@phx.gbl>
References: <BAY155-W607AF2E8CDDE2916446B1AA35F0@phx.gbl>
Message-ID: <CALGmxEJvg9PqWGhdzsSu8b5s9QkmW_pCW+myhgk97R9rSYinUw@mail.gmail.com>

1) please don't multi-post like this -- this is really a "tutor"
question. i.e. your problem is very basic python

On Fri, Mar 16, 2012 at 11:52 AM, Boris Vladimir Comi
<glez_b at comunidad.unam.mx> wrote:
> I detect a class of atmospheric phenomena known as Mesoscale Convective
> Systems (MCS). To accomplish this, I have a database of satellites by 2004,
> every half hour. These data were downloaded from the server:
> unidata2.ssec.wisc.edu and data format is: 200404271515.goes12ir (Area
> Format)

For this kind of work, you probably:

1) don't want to use Jython, unless there is a Java libary that will
do most of the work that you want to use

2) do want to use numpy/scipy -- and likely the ndimage package:

http://numpy.scipy.org/

http://www.scipy.org/SciPyPackages/Ndimage

> File "/home/mcidasv/JYTHON/TIR.py", line 22
> ??? count = count + 1;

debuggin hint -- when the error is not obvious, ALWAYS look at the
proceeding line(s) of code:

         for j in xrange(ad.getElements()):
              if (data[0][i][j] > 199.5 and (data[0][i][j] < 200.5
                  count = count + 1;

the "if" needs two more end-parentheses, and a colon.

Also -- don't use semi-colons at the end of line -- they will just confuse you.

Get a good Python-aware editor -- it will help catch these really
simple kinds of syntax errors for you.

Good luck,

-Chris




-- 

Christopher Barker, Ph.D.
Oceanographer

Emergency Response Division
NOAA/NOS/OR&R ? ? ? ? ? ?(206) 526-6959?? voice
7600 Sand Point Way NE ??(206) 526-6329?? fax
Seattle, WA ?98115 ? ? ??(206) 526-6317?? main reception

Chris.Barker at noaa.gov

From barnes.leo at gmail.com  Tue Mar 27 15:59:37 2012
From: barnes.leo at gmail.com (Leo Barnes)
Date: Tue, 27 Mar 2012 15:59:37 +0200
Subject: [Image-SIG] GIF bug
Message-ID: <CAAeLMUjojm6mF0SJiUDG0zGkbOG21vZTohCX+BTh37wyTjOvWg@mail.gmail.com>

Hi!

I have found a bug in how PIL handles animated GIFs. The GIF in
question contains several frames, where each new frame only overwrites
parts of the previous frame. Unless I explicitly ask PIL to load/show
each frame, PIL completely skips previous frames which means that the
extracted image will contain uninitialized data.

Steps to reproduce:
Image: http://dl.dropbox.com/u/14498565/image0006.gif

#Will show uninitialized data
from PIL import Image
i = Image.open("image0006.gif")
i.seek(1)
j = i.convert("RGBA")
j.show()

#Seems to fix problem with uninitialized data by forcing PIL to load
the previous frame
#(Works most of the time, but does not seem completely reliable. The
image buffer is probably uninitialized and #simply reused which can
work if lucky.)
from PIL import Image
i = Image.open("image0006.gif")
i.load()
i.seek(1)
j = i.convert("RGBA")
j.show()

Best regards,
//Leo

From cannon.el at gmail.com  Wed Mar 14 18:22:49 2012
From: cannon.el at gmail.com (Edward Cannon)
Date: Wed, 14 Mar 2012 10:22:49 -0700
Subject: [Image-SIG] Unable to install Pil in windows7
In-Reply-To: <CAMzV_h108iLAFz1F=6Cn61Ti1wBih+3m9erQ46qtK71Avqk6gw@mail.gmail.com>
References: <CAMzV_h108iLAFz1F=6Cn61Ti1wBih+3m9erQ46qtK71Avqk6gw@mail.gmail.com>
Message-ID: <FF86FEB2-4E46-43DA-B727-95BAD9F95DE8@gmail.com>

Do you have a 64 bit Python and 32 bit PIL? That can be a problem. 



On Mar 14, 2012, at 8:35 AM, praveen krishna <praveenchitneedi at gmail.com> wrote:

> Hi,
>   I tried to install pil in windows but it is not getting installed and generating following errors which are attached to this mailing list .I have installed Python 2.7 and I tried to perform registy by following the script in this link http://effbot.org/zone/python-register.htm but is giving error
>     *** Unable to register!
>  *** You probably have another Python installation!
> 
> 
>  can u please help me in sorting this and to install pil in my system to run web2py application .
> <error generated for installing pil.jpg>
> <error generated for installing pil 01.jpg>
> _______________________________________________
> Image-SIG maillist  -  Image-SIG at python.org
> http://mail.python.org/mailman/listinfo/image-sig
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From joel.goldstick at gmail.com  Fri Mar 16 19:58:44 2012
From: joel.goldstick at gmail.com (Joel Goldstick)
Date: Fri, 16 Mar 2012 14:58:44 -0400
Subject: [Image-SIG] [Tutor] Help for to do a script
In-Reply-To: <BAY155-W607AF2E8CDDE2916446B1AA35F0@phx.gbl>
References: <BAY155-W607AF2E8CDDE2916446B1AA35F0@phx.gbl>
Message-ID: <CAPM-O+y+M8PMLkKPLxWr+hJOAqe3JsoFduKqxyHuF1tXO9Qx4A@mail.gmail.com>

On Fri, Mar 16, 2012 at 2:52 PM, Boris Vladimir Comi
<glez_b at comunidad.unam.mx> wrote:
> Hello, I am writing to request your help in the realization of a script. I
> am new to this and I'm just learning the wonderful world of python and this
> has made me a little difficult.
>
> Briefly I commented what I intend to do:
>
> I detect a class of atmospheric phenomena known as Mesoscale Convective
> Systems (MCS). To accomplish this, I have a database of satellites by 2004,
> every half hour. These data were downloaded from the server:
> unidata2.ssec.wisc.edu and data format is: 200404271515.goes12ir (Area
> Format)
>
> The first thing to do is detect a convective system in the satellite data,
> using the following characteristics:
>
> MCS Criteria
>
> Minimum Size: Continuous cold cloud shield (TIR <219 K and Must Have an
> area> 34000 km ?)
>
> Duration: Definition of Minimum Size Must Be A Period of Exceed or ? 3h
>
> Initiation: Time When the Minimum Size is met
>
> Maximum Extention: Time when the continuous cloud shield (TIR <219 K) is at
> its maximum size
>
> Termination: When the Time Minimun Size is not satisfied
>
> where: Temperature Infrarred is TIR
>
> To achieve this, first I created a script in python to identify a MCS in my
> database (script in attached)
>
> The script is run from a linux terminal ($ python TIR.py), to run it I get
> the following error:
>
>
> File "/home/mcidasv/JYTHON/TIR.py", line 22
> ??? count = count + 1;
> ??????? ^
> SyntaxError: invalid syntax
>
> If anyone can help me with this script or any idea you suggest to improve
> it, I would greatly appreciate.
>
>
>
> Boris Vladimir Comi Gonzalez
> Universidad Nacional Aut?noma de M?xico
> Grupo de Tormentas Convecivas
>
> _______________________________________________
> Tutor maillist ?- ?Tutor at python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
>

Here is your code:

     for i in xrange(ad.getLines()):
          for j in xrange(ad.getElements()):
              if (data[0][i][j] > 199.5 and (data[0][i][j] < 200.5
                  count = count + 1;
      print "For file",name," count = ",count

Notice that this line is broken:

              if (data[0][i][j] > 199.5 and (data[0][i][j] < 200.5

change it to this and try running again:

              if (data[0][i][j] > 199.5) and (data[0][i][j] < 200.5)


-- 
Joel Goldstick

From joel.goldstick at gmail.com  Fri Mar 16 19:59:45 2012
From: joel.goldstick at gmail.com (Joel Goldstick)
Date: Fri, 16 Mar 2012 14:59:45 -0400
Subject: [Image-SIG] [Tutor] Help for to do a script
In-Reply-To: <CAPM-O+y+M8PMLkKPLxWr+hJOAqe3JsoFduKqxyHuF1tXO9Qx4A@mail.gmail.com>
References: <BAY155-W607AF2E8CDDE2916446B1AA35F0@phx.gbl>
	<CAPM-O+y+M8PMLkKPLxWr+hJOAqe3JsoFduKqxyHuF1tXO9Qx4A@mail.gmail.com>
Message-ID: <CAPM-O+xdHCVKSCtiH+UmKcph92fy99+X6EOWjN+VMwZm_=uyCg@mail.gmail.com>

On Fri, Mar 16, 2012 at 2:58 PM, Joel Goldstick
<joel.goldstick at gmail.com> wrote:
> On Fri, Mar 16, 2012 at 2:52 PM, Boris Vladimir Comi
> <glez_b at comunidad.unam.mx> wrote:
>> Hello, I am writing to request your help in the realization of a script. I
>> am new to this and I'm just learning the wonderful world of python and this
>> has made me a little difficult.
>>
>> Briefly I commented what I intend to do:
>>
>> I detect a class of atmospheric phenomena known as Mesoscale Convective
>> Systems (MCS). To accomplish this, I have a database of satellites by 2004,
>> every half hour. These data were downloaded from the server:
>> unidata2.ssec.wisc.edu and data format is: 200404271515.goes12ir (Area
>> Format)
>>
>> The first thing to do is detect a convective system in the satellite data,
>> using the following characteristics:
>>
>> MCS Criteria
>>
>> Minimum Size: Continuous cold cloud shield (TIR <219 K and Must Have an
>> area> 34000 km ?)
>>
>> Duration: Definition of Minimum Size Must Be A Period of Exceed or ? 3h
>>
>> Initiation: Time When the Minimum Size is met
>>
>> Maximum Extention: Time when the continuous cloud shield (TIR <219 K) is at
>> its maximum size
>>
>> Termination: When the Time Minimun Size is not satisfied
>>
>> where: Temperature Infrarred is TIR
>>
>> To achieve this, first I created a script in python to identify a MCS in my
>> database (script in attached)
>>
>> The script is run from a linux terminal ($ python TIR.py), to run it I get
>> the following error:
>>
>>
>> File "/home/mcidasv/JYTHON/TIR.py", line 22
>> ??? count = count + 1;
>> ??????? ^
>> SyntaxError: invalid syntax
>>
>> If anyone can help me with this script or any idea you suggest to improve
>> it, I would greatly appreciate.
>>
>>
>>
>> Boris Vladimir Comi Gonzalez
>> Universidad Nacional Aut?noma de M?xico
>> Grupo de Tormentas Convecivas
>>
>> _______________________________________________
>> Tutor maillist ?- ?Tutor at python.org
>> To unsubscribe or change subscription options:
>> http://mail.python.org/mailman/listinfo/tutor
>>
>
> Here is your code:
>
> ? ? for i in xrange(ad.getLines()):
> ? ? ? ? ?for j in xrange(ad.getElements()):
> ? ? ? ? ? ? ?if (data[0][i][j] > 199.5 and (data[0][i][j] < 200.5
> ? ? ? ? ? ? ? ? ?count = count + 1;
> ? ? ?print "For file",name," count = ",count
>
> Notice that this line is broken:
>
> ? ? ? ? ? ? ?if (data[0][i][j] > 199.5 and (data[0][i][j] < 200.5
>
> change it to this and try running again:
>
> ? ? ? ? ? ? ?if (data[0][i][j] > 199.5) and (data[0][i][j] < 200.5):
>
>
> --
> Joel Goldstick

Sorry, also put : at end of if statements

-- 
Joel Goldstick

From wrybread at gmail.com  Fri Mar 16 20:05:02 2012
From: wrybread at gmail.com (Alec Bennett)
Date: Fri, 16 Mar 2012 12:05:02 -0700
Subject: [Image-SIG] Help for to do a script
In-Reply-To: <BAY155-W607AF2E8CDDE2916446B1AA35F0@phx.gbl>
References: <BAY155-W607AF2E8CDDE2916446B1AA35F0@phx.gbl>
Message-ID: <CACB9+z2PmKY-zJQ+FQ9vqitgkdxNdE9606dpy0rPMaetwKwBaQ@mail.gmail.com>

There's a lot wrong with it. I don't have the modules so I can't test, but
you need to chnage these two lines:

              if (data[0][i][j] > 199.5 and (data[0][i][j] < 200.5

                  count = count + 1;

To something like:

              if data[0][i][j] > 199.5 and data[0][i][j] < 200.5:

                  count = count + 1;

That's about very basic Python syntax, not the Image module, fyi.

Also, cross-posting to multiple email lists is considered very bad form.




On Fri, Mar 16, 2012 at 11:52 AM, Boris Vladimir Comi <
glez_b at comunidad.unam.mx> wrote:

>  Hello, I am writing to request your help in the realization of a script.
> I am new to this and I'm just learning the wonderful world of python and
> this has made me a little difficult.
>
> Briefly I commented what I intend to do:
>
> I detect a class of atmospheric phenomena known as Mesoscale Convective
> Systems (MCS). To accomplish this, I have a database of satellites by 2004,
> every half hour. These data were downloaded from the server:
> unidata2.ssec.wisc.edu and data format is: 200404271515.goes12ir (Area
> Format)
>
> The first thing to do is detect a convective system in the satellite data,
> using the following characteristics:
>
> *MCS Criteria*
>
> *Minimum Size*: Continuous cold cloud shield (TIR <219 K and Must Have an
> area> 34000 km ?)
>
> *Duration*: Definition of Minimum Size Must Be A Period of Exceed or ? 3h
>
> *Initiation*: Time When the Minimum Size is met
> *
> Maximum Extention*: Time when the continuous cloud shield (TIR <219 K) is
> at its maximum size
>
> *Termination:* When the Time Minimun Size is not satisfied
>
> where: Temperature Infrarred is TIR
>
> To achieve this, first I created a script in python to identify a MCS in my
> database (script in attached)
>
> The script is run from a linux terminal ($ python TIR.py), to run it I get the
> following error:
>
>
> *File "/home/mcidasv/JYTHON/TIR.py", line 22
>     count = count + 1;
>         ^
> SyntaxError: invalid syntax*
>
> If anyone can help me with this script or any idea you suggest to improve
> it, I would greatly appreciate.
>
>
>
> ****Boris Vladimir Comi Gonzalez
> Universidad Nacional Aut?noma de M?xico
> Grupo de Tormentas Convecivas
>
> _______________________________________________
> Image-SIG maillist  -  Image-SIG at python.org
> http://mail.python.org/mailman/listinfo/image-sig
>
>
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From regebro at gmail.com  Fri Mar 16 20:14:59 2012
From: regebro at gmail.com (Lennart Regebro)
Date: Fri, 16 Mar 2012 20:14:59 +0100
Subject: [Image-SIG] [Python-porting] Help for to do a script
In-Reply-To: <BAY155-W607AF2E8CDDE2916446B1AA35F0@phx.gbl>
References: <BAY155-W607AF2E8CDDE2916446B1AA35F0@phx.gbl>
Message-ID: <CAL0kPAVqq=hMkA2WKGh_2E1P00B4fUEM-AU=O_Xs78jinose2w@mail.gmail.com>

This mailing list is about porting from Python 2 to Python 3. For help
with specific programming errors I recommend stackoverflow.com.

ps. the error you made is probably on the row before

On Fri, Mar 16, 2012 at 19:52, Boris Vladimir Comi
<glez_b at comunidad.unam.mx> wrote:
> Hello, I am writing to request your help in the realization of a script. I
> am new to this and I'm just learning the wonderful world of python and this
> has made me a little difficult.
>
> Briefly I commented what I intend to do:
>
> I detect a class of atmospheric phenomena known as Mesoscale Convective
> Systems (MCS). To accomplish this, I have a database of satellites by 2004,
> every half hour. These data were downloaded from the server:
> unidata2.ssec.wisc.edu and data format is: 200404271515.goes12ir (Area
> Format)
>
> The first thing to do is detect a convective system in the satellite data,
> using the following characteristics:
>
> MCS Criteria
>
> Minimum Size: Continuous cold cloud shield (TIR <219 K and Must Have an
> area> 34000 km ?)
>
> Duration: Definition of Minimum Size Must Be A Period of Exceed or ? 3h
>
> Initiation: Time When the Minimum Size is met
>
> Maximum Extention: Time when the continuous cloud shield (TIR <219 K) is at
> its maximum size
>
> Termination: When the Time Minimun Size is not satisfied
>
> where: Temperature Infrarred is TIR
>
> To achieve this, first I created a script in python to identify a MCS in my
> database (script in attached)
>
> The script is run from a linux terminal ($ python TIR.py), to run it I get
> the following error:
>
>
> File "/home/mcidasv/JYTHON/TIR.py", line 22
> ??? count = count + 1;
> ??????? ^
> SyntaxError: invalid syntax
>
> If anyone can help me with this script or any idea you suggest to improve
> it, I would greatly appreciate.
>
>
>
> Boris Vladimir Comi Gonzalez
> Universidad Nacional Aut?noma de M?xico
> Grupo de Tormentas Convecivas
>
> _______________________________________________
> Python-porting mailing list
> Python-porting at python.org
> http://mail.python.org/mailman/listinfo/python-porting
>

From glez_b at comunidad.unam.mx  Fri Mar 16 22:46:19 2012
From: glez_b at comunidad.unam.mx (Boris Vladimir Comi)
Date: Fri, 16 Mar 2012 21:46:19 +0000
Subject: [Image-SIG] Help whith script
Message-ID: <BAY155-W52E2824217D1A9C40B650AA35F0@phx.gbl>


Hello, corrected the code and it runs correctly. I run the script through a program called McIDAS-V.
I guess when i run the script (TIR.py) as follows: / home / mcidasv / McIDAS-V-System / runMcV-islfile scm.py refers to the module AreaFile.

My database is composed of monthly and is the Following:

 200406010000.goes10ir
 200406010000.goes10vis
 200406010000.goes10wv
 200406010000.goes12ir
 200406010000.goes12vis
 200406010000.goes12wv

 Each has 3 channels: ir(infrarred), vis (visible), wv(water vapor) with four variables: raw, radiance, brightness and temperature .
 I actually only interested in data format  .goes12ir and variable temperature. 
How I can make that filter data and where in the code could add that filter ?

After filtering the database, how could calculate the area of ??the cloud shield whose temperature is <219 K (see purple line in attached)?

Note: when I deploy a data(200406010000.goes12ir) in the McIDAS-V, I get a satellite image that represents different values ??of brightness temperatures associated with the cloud that appears in the satellite image (see image in attached)

Boris Vladimir Comi Gonzalez
Universidad Nacional Aut?noma de M?xico
Grupo de Tormentas Convecivas
 		 	   		  
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From david at d-austin.net  Wed Mar 21 01:33:48 2012
From: david at d-austin.net (David Austin)
Date: Wed, 21 Mar 2012 11:33:48 +1100
Subject: [Image-SIG] BUG: convert to greyscale errors
Message-ID: <CAAqcurRQQnY9bB3urcJt+7oh42GfHDTd7cAb_u55VEujNDZnVQ@mail.gmail.com>

Hi all,

I've found an incorrect dependency upon neighbouring pixels in conversion
to
greyscale.  Running this simple script (against attached images):

import Image
im1 = Image.open('a.png')
im2 = Image.open('b.png')
pt = (301, 72)
print "Before", im1.getpixel(pt), im2.getpixel(pt)
im1 = im1.convert("P")
im2 = im2.convert("P")
print "After", im1.getpixel(pt), im2.getpixel(pt)

Gives:

Before (63, 73, 50) (63, 73, 50)
After 60 59

i.e. before conversion the RGB values are identical, after the greyscale
values are not.

Regards,
David
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From b.canatan at student.rug.nl  Mon Mar 26 01:20:19 2012
From: b.canatan at student.rug.nl (B.Canatan)
Date: Mon, 26 Mar 2012 01:20:19 +0200
Subject: [Image-SIG] PIL on Python 2.7?
Message-ID: <7610a32e8be1b.4f6fc453@rug.nl>

?Hi all,

Will PIL work on Python 2.7 (on a Linux machine)?

Sincerely,
Baris
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From olt at bogosoft.com  Wed Mar 28 07:57:14 2012
From: olt at bogosoft.com (Oliver Tonnhofer)
Date: Wed, 28 Mar 2012 07:57:14 +0200
Subject: [Image-SIG] BUG: convert to greyscale errors
In-Reply-To: <CAAqcurRQQnY9bB3urcJt+7oh42GfHDTd7cAb_u55VEujNDZnVQ@mail.gmail.com>
References: <CAAqcurRQQnY9bB3urcJt+7oh42GfHDTd7cAb_u55VEujNDZnVQ@mail.gmail.com>
Message-ID: <6F6E7F5A-64E2-4048-A2AB-8B42380BEAE3@bogosoft.com>

Hi,

On 21.03.2012, at 01:33, David Austin wrote:
> I've found an incorrect dependency upon neighbouring pixels in conversion to 
> greyscale.  Running this simple script (against attached images):
> 
> import Image
> im1 = Image.open('a.png')
> im2 = Image.open('b.png')
> pt = (301, 72)
> print "Before", im1.getpixel(pt), im2.getpixel(pt)
> im1 = im1.convert("P")
> im2 = im2.convert("P")

This will convert the image to a paletted image.

> Before (63, 73, 50) (63, 73, 50)
> After 60 59

And this is not the gray-value but an index to the color palette. This palette will look different if the images differ.


From gdr at garethrees.org  Sat Mar 31 18:22:59 2012
From: gdr at garethrees.org (Gareth Rees)
Date: Sat, 31 Mar 2012 17:22:59 +0100
Subject: [Image-SIG] BUG: PNG files with zTXt chunk can't be read
	incrementally
Message-ID: <9E4707CF-339D-4C99-A0C9-3C7F56C18981@garethrees.org>

SUMMARY

A PNG file containing a compressed text (zTXt) chunk prior to the first IDAT chunk cannot reliably be read by feeding it in chunks to an ImageFile.Parser object.


STEPS TO REPRODUCE

Create a PNG image with a zTXt chunk prior to the first IDAT chunk:

    from PngImagePlugin import _MAGIC, putchunk
    import struct, zlib

    with open('bug2.png', 'wb') as f:
        f.write(_MAGIC)
        putchunk(f, 'IHDR', struct.pack('>IIBBBBB', 1, 1, 1, 0, 0, 0, 0))
        putchunk(f, 'zTXt', 'key\0\0' + zlib.compress('value'))
        putchunk(f, 'IDAT', zlib.compress(struct.pack('>BB', 0, 0)))
        putchunk(f, 'IEND', '')

The image (and its zTXt chunk) loads correctly via Image.open:

    >>> Image.open('bug2.png')
    <PngImagePlugin.PngImageFile image mode=1 size=1x1 at 0x10CDA0D88>
    >>> _.info
    {'key': 'value'}

But if you feed a chunk of this image to an ImageFile.Parser then you can get a ValueError:

    >>> ImageFile.Parser().feed(open('bug.png', 'rb').read(41))
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "ImageFile.py", line 402, in feed
        im = Image.open(fp)
      File "Image.py", line 1965, in open
        return factory(fp, filename)
      File "ImageFile.py", line 91, in __init__
        self._open()
      File "PngImagePlugin.py", line 331, in _open
        s = self.png.call(cid, pos, len)
      File "PngImagePlugin.py", line 115, in call
        return getattr(self, "chunk_" + cid)(pos, len)
      File "PngImagePlugin.py", line 291, in chunk_zTXt
        k, v = string.split(s, "\0", 1)
    ValueError: need more than 1 value to unpack

or a zlib.error:

    >>> ImageFile.Parser().feed(open('bug.png', 'rb').read(50))
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "ImageFile.py", line 402, in feed
        im = Image.open(fp)
      File "Image.py", line 1965, in open
        return factory(fp, filename)
      File "ImageFile.py", line 91, in __init__
        self._open()
      File "PngImagePlugin.py", line 331, in _open
        s = self.png.call(cid, pos, len)
      File "PngImagePlugin.py", line 115, in call
        return getattr(self, "chunk_" + cid)(pos, len)
      File "PngImagePlugin.py", line 296, in chunk_zTXt
        self.im_info[k] = self.im_text[k] = zlib.decompress(v[1:])
    zlib.error: Error -5 while decompressing data: incomplete or truncated stream


HISTORY

This bug was previously reported by Eddie Bishop in June 2011
<http://mail.python.org/pipermail/image-sig/2011-June/006782.html>


ANALYSIS

The immediate cause of the error is that PngStream.chunk_zTXt in PngImagePlugin.py gets called with an incomplete chunk. The method looks like this:

    def chunk_zTXt(self, pos, len):
        s = ImageFile._safe_read(self.fp, len)
        k, v = string.split(s, "\0", 1)
        comp_method = ord(v[0])
        if comp_method != 0:
            raise SyntaxError("Unknown compression method %s in zTXt chunk" % comp_method)
        import zlib
        self.im_info[k] = self.im_text[k] = zlib.decompress(v[1:])
        return s

When feeding the data to the parser, the _safe_read may return a short chunk (fewer than len bytes), and so either the call to string.split may fail (because the chunk ended mid-key), or else the call to zlib.decompress may fail.


WORKAROUND

I think the simplest workaround is for chunk_zTXt to abort if the read is short. The IOError will be caught by ImageFile.Parser.feed.

    def chunk_zTXt(self, pos, length):
        s = ImageFile._safe_read(self.fp, length)
        if len(s) != length:
            raise IOError
        # rest of function unchanged

(Note that I've had to change the argument name "len" to "length" to avoid shadowing the built-in.)


RELATED BUGS

I have not attempted to make test cases for any of the other chunk types, but from reading the code it looks as if tRNS, gAMA, and pHYs chunks could also fail in similar ways if there is a short read. (tEXt chunks appear to be safe, but I think that's by luck rather than good planning.) These related bugs could all be worked around in the same way (that is, by raising an IOError in the event of a short read). If you need me to make test cases, let me know.

-- 
Gareth Rees