[Tutor] more on wx and tiff

[Albert-Jan Roskam]

Hi,

Got it. Thought it would be nice to share it. What set me on the wrong foot 
completely was that writing gif files is not possible due to copyright issues.
Below is a very simple version of a conversion function for Group 4 Tif to png.

import wx, os, time

def g4TifToPng(tif, png = None):
    if png is None:
        png = os.path.splitext(tif)[0] + ".png"
    myImg = wx.Image(tif)
    if myImg.GetImageCount(tif) == 2:
        SECONDPAGE = 1
        myImg = wx.Image(tif, type = wx.BITMAP_TYPE_TIF, index = SECONDPAGE)
        # myImg = myImg.GetSubImage((0, 2338, 3304, 2338)) # offset h & w, rect 
h & w
        myImg.SaveFile(png, wx.BITMAP_TYPE_PNG)
        newW, newH = myImg.GetSize()
        print "%s:: writing file %s (%s x %s pixels)" % \
              (time.strftime("%H:%M:%S"), png, newW, newH)
        
g4TifToPng(tif = "c:/temp/somefile.tif")



 Cheers!!
Albert-Jan


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
All right, but apart from the sanitation, the medicine, education, wine, public 
order, irrigation, roads, a fresh water system, and public health, what have the 
Romans ever done for us?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~




________________________________
From: Albert-Jan Roskam <fomcl at yahoo.com>
To: Wayne Werner <waynejwerner at gmail.com>
Cc: Python Mailing List <tutor at python.org>
Sent: Fri, August 27, 2010 8:00:16 PM
Subject: Re: [Tutor] more on wx and tiff


Hi Wayne,

Yep, I considered using PIL, but that package won't read so-called Group 4 Tiffs 
[1]. They're two-page, black-and-white scanned forms. I need part of the second 
form (i.e., the backside of a certificate). The page contains some hand-written 
info which needs to be presented in a simple data entry program, which I made 
using Tkinter.

The forms are confidential so they may not leave the company network. And the IT 
droids are somewhat paranoid so it's very time-consuming to get some new 
executable 'inside' the company network. Beeeh, formalities... :-(

 
[1] http://www.digitalpreservation.gov/formats/fdd/fdd000024.shtml

Cheers!!
Albert-Jan


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
All right, but apart from the sanitation, the medicine, education, wine, public 
order, irrigation, roads, a fresh water system, and public health, what have the 
Romans ever done for us?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~




________________________________
From: Wayne Werner <waynejwerner at gmail.com>
To: Albert-Jan Roskam <fomcl at yahoo.com>
Cc: Python Mailing List <tutor at python.org>
Sent: Fri, August 27, 2010 6:44:04 PM
Subject: Re: [Tutor] more on wx and tiff


On Fri, Aug 27, 2010 at 11:25 AM, Albert-Jan Roskam <fomcl at yahoo.com> wrote:

Hi again,
>
>Some more questions about tiff conversion. 
>
>First, thanks for your previous replies. I cannot use IrfanView any time soon, 
>nor will my boss switch to Linux. 
>
>

Have you tried using the PIL?
http://www.pythonware.com/products/pil/

import Image
i = Image.open("file.tiff")
i.save(open('file.png', 'w'), filetype='png')

I don't know if that was previously suggested, but it should work on any 
platform with PIL installed. 

HTH,
Wayne



      
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