Image patents
Linh Pham
question at closedsrc.org
Mon Apr 26 22:11:55 UTC 2004
On 2004-04-27 00:00 +0200, "Simon L. Nielsen" <simon at FreeBSD.org> wrote:
# I think that's the only one, so I think we can live with loosing that.
I agree. I'm not much of a fan when it comes to animated images, mostly
because they tend to eat up extra bandwidth (which is something that I
don't have a lot of at home).
# I'm rather sure .png images support transparency.
It does, though IE and potentially Netscape 4.x have some issues with
alpha transparency... but it may not be something to worry about.
# Hmm, some .png images are much larger than their .jpg counterparts.
# E.g. :
#
# getstarb.jpg 26-Apr-2004 12:24 20k
# getstarb.png 26-Apr-2004 12:24 171k
#
# That seems a bit exessive, but can hopefully fixed by using another
# program for the conversion (or tuning some parameters).
#
# How much space does the .png images use compared to the .gif/.jpg
# versions ?
Since PNG is a lossless format, you can crank up the compression level
and not lose any details in the image (I think it just requires a bit
more CPU cycles to decompress the image... but I could be really wrong
there).
For instance, I've converted a copy of the "Powered by FreeBSD" GIF to
PNG and the PNG version is a bit smaller:
-rw-r--r-- 1 question wheel 5279 Jan 20 2003 powerlogo.gif
-rw-r--r-- 1 question wheel 4957 Jan 20 2003 powerlogo.png
IIRC, I used the gif2png port to do the conversion. The only JPEG file
that I have for my site that I converted to PNG was done through GIMP.
I'm not sure if or what port(s) are available for the JPEG->PNG
conversion.
# If a browser doesn't support .png today... well, I can live with not
# supporting that browser then :-).
heh... yeah, I wouldn't worry about many people browsing the FreeBSD
websites using Sun's Java web browser that they had a while ago :)
# Hmm, well if it's only the powerani.gif image that needs to be converted
# then it sounds like MNG is better than nothing.
<nods /> At least it will show that the project continues to push for
open standards and open formats :)
# At first I though it would be a bad idea to rename the diretory... but
# the I had a look at the content of the diretory :
#
# [simon at zaphod:gifs] du -ck . | tail -n 1
# 3680 total
# [simon at zaphod:gifs] du -ck *.jpg *.gif | tail -n 1
# 3256 total
# [simon at zaphod:gifs] du -ck *.png | tail -n 1
# 250 total
#
# So it's the main part of the directory that needs to be replaced anyway,
# so it wouldn't really hurt much (in wasted repository space) to rename
# the directory at the same time as we convert the images. So, I'm also
# for renaming the directory and 'img' seems as good a name as any to me.
I was a bit nervous after I wrote the directory rename bit and after I
sent out the message :D
I like and use "img" since it's fairly neutral.
--
Linh Pham question at closedsrc.org
Webmaster and FreeBSD Geek http://closedsrc.org
Apprentice Manager Editor and Writer http://www.daemonnews.org
C++ is to C, as lung cancer is to lung | There is always one more bug.
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