Details Ticket 2311


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Serial Number 2311
Subject Tutorial picture too big
Area none
Queue freegis
Requestors bernhard@intevation.de
Owner jan
Status open
Last User Contact Fri Feb 6 18:24:07 2004 (9 yr ago)
Current Priority 35
Final Priority 70
Due No date assigned
Last Action Tue Mar 22 15:13:54 2005 (8 yr ago)
Created Fri Feb 6 17:37:13 2004 (9 yr ago)

Transaction History Ticket 2311


Fri, Feb 6 2004 17:37:13    Request created by bernhard  
Subject: Tutorial picture too big

http://www.freegis.org/freegis_tutorial/online/title.png
is too big.  424851 Byte !!!!

Should be ~35K Byte
Fri, Feb 6 2004 18:24:07    Mail sent by guest  
I reduced the image to 200x200 pixels (Browsers will scale it to 400x400) and
32 colors which gives an file size of about 15K. 400x400 pixels will always be
above 50K with PNG. JPG helps here (35K), but then the html files have to be
changed.

The original file is saved in title-big.png.

Reassigning to Jan, because the latex2html configuration for generating this
image has to be changed.
Fri, Feb 6 2004 18:24:41    Owner changed to jan by thomas  
Fri, Feb 6 2004 18:47:19    Comments added by bernhard  
Is the size of an index png also so big?
We should reduce the size of the image
and stop the scaling.
The scaled image looks ugly.
Mon, Feb 9 2004 07:00:28    Comments added by hbowman  
May I recommend 'pngcrush' for getting those PNGs as small as they can be.

http://pmt.sourceforge.net/pngcrush/

on debian:
 apt-get install pngcrush



use:
 pngcrush -brute infile.png outfile.png


note reducing the size of the color table is the most dramatic way to shrink
the file size..


have fun,
Hamish
Thu, Feb 26 2004 18:05:00    Comments added by bernhard  
pngcrush does not reduce the 15k image anymore (except for 12 Bytes). :) 
Tue, Mar 22 2005 15:13:54    Comments added by bernhard  
Cc: jan@intevation.de

Jan: Did you actually change the latex creation for this image, so we can
solve this issue?
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