On 06/05/2015 10:25 PM, Johan Van de Wauw wrote:
On Thu, Jun 4, 2015 at 8:33 PM, Johan Van de Wauw
<[email protected]> wrote:
Hi all,
I've been experimenting with pngquant [1] to reduce the size of our
png images in the documentation. This implements a lossy compression
method, but all images I tried came out just fine.
In total, we could save about 36Mb by using this compression on all
files. I believe this is significant enough to do the change for most
files, especially since they are accessed also over the web by people
reading the quickstart.
I prepared a branch which contains the compressed images at:
https://github.com/johanvdw/OSGeoLive-doc/tree/compresspng
I made a single commit per image, so if we merge we can still roll
back specific images easily.
In fact, on github, you can watch the images side by side or as a slide over.
During the meeting last night I proposed fixing only those images
where the difference was most significant (>50% reduction in size and
files of at least 32Kb).
The results are here:
https://github.com/johanvdw/OSGeoLive-doc/tree/compresspng
The result can be downloaded as a package from:
https://launchpad.net/~johanvdw/+archive/ubuntu/osgeolive-docs-compressedpng
And it can be previewed at:
http://gisky.be/osgeolive-docs/en/index.html
In total we save some 34 Mb, most of which is preserved when
compressing the files.
Since I did not see any image which is not good I propose to merge this.
Kind Regards,
Johan
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First of all, thank you Johan for your excellent work on creating the
deb packaging for the documentation.
Looking at the demo site, I think that all the images are not scaled
properly (set to 100%?).
Any idea what is wrong?
Best,
Angelos
--
Angelos Tzotsos
Remote Sensing Laboratory
National Technical University of Athens
http://users.ntua.gr/tzotsos
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