TM->requirements: please have a look.

I would suggest that the 159x & 97x repeated images are the 16x16 and 32x32
versions of the 'green cross on blue background' icon.
Look at: ui/default_images/sfx2/res/ command.png & ln06.png.
I assume these icons are place holders? It is possible that the other repeated
icons are 'valid', since there are multiple copies of the standard tick, cross,
etc. in different project folders within 'images.zip'... it would be nice to cut
down on some of the duplication by assembling the 'core' icons. Might also
relate to issue: 36518?
Cheers, Andrew.

To work towards optimizing OOo images, I have started an audit. It is currently
only an early draft, but I will post updates fairly regularly here:
http://students.bath.ac.uk/ea2aced/OOo/OOoIconCat.odt

Hopefully this work is of interest to developers of OOo. With 2.0.2rc1, the
'images.zip' archives now contributes *18MB* of the application size!!

Regards,
Andrew

CC sts

duplicate of issue 66690 ??

This issue is about reducing the reduncandy, not quality of images, so no, this
is not duplicate...

Kai: are you interesting to work on this?

Although I have not updated the audit document in a while, the current link is:
http://people.bath.ac.uk/ea2aced/OOo/OOoIconCat.odt
If this work is useful I will continue adding to it.

I think to make this really work, it would be great to have a combined effort
with freedesktop.org, so that a naming / icon standard can be formed for general
office / productivity suites. I'm happy to collaborate on this- with anyone!
Apparently the IconTool maintained by Sun's ArtTeam (Stella) stores contextual
information for the images- so this might allow redundancy to be reduced.

Maybe Stella could comment on the current state of the place holder icons (green
cross)- are they needed? Will icons be generated? If not, we should remove them
or at lest substitute with minimum size png images (67 bytes for 1pixel). With
current builds, one placeholder icon will now occur *8* times (default norm &
HC, industrial norm & HC, crystal norm & HC, and HiContrast norm & HC!!).

Look forward to feedback or signs of interest :-)
Andrew

An idea:

1. remove duplicates
    - either via preprocessing the images list or via postprocessing the images.zip file

2. in case that image doesn't exist in the images.zip, consult duplicates.txt file in images.zip. This file 
will contain something like:

    path/existing/file/icon.png
    <TAB>path/to/not/existing/duplicated/icon/which/was/removed/icon.png
    <TAB>path/to/another/not/existing/duplicated/icon/which/was/removed/icon.png
    ...

Do you think it could work?

cd: Added myself on CC.

Created attachment 72528

I wonder whether a cleanup already has bee done? I did some tests with very imperfect tools and did not fine "zillions" if Identical files. But nevertheless, found for "images.zip" osme possible duplicates:

(a) many imagename.png exist more than 1 time in the extracted file system.
    Examples: names_as_addressing.png 23 times, sc_underline.png 25 times
(b) A quick test with "sc_underline.png" shows that most of them have 
    different sizes, so they can't be identical. But I found several with
    identical size, let's take the ones with 408 bytes:
    ....\images\res\commandimagelist\sv\
    ....\images\res\commandimagelist\en-GB
    ....\images\res\commandimagelist\de
    ....\images\res\commandimagelist
    really look identical to me, show a capital underlined U
(c) so due to (b) there still might be some necessity for a cleanup?

(d) My test (WIN 7):
(d1) extract  "images.zip" (from "\share\config") to a new folder 
(d2) from console from folder to where "images.zip"
     has been extracted  do 'dir /s /w > dir.csv'
(d3) open "dir.csv" with calc, copy / paste all rows containing a .png
     to a new sheet
(d4) In a new column with function like "=COUNTIF(D$1:D$10000;D4745)" 
     in row 4745 list number of found files with that 
     particular name in D4745
(d5) search extracted folders for a name with duplicates, sort hits by
     file size and compare files with the same name and size
(e) may be there are more powerful tools to find duplicates?
    My tests are rather "expensive".

Created attachment 82728 [details]
count results

My file number counts for "images.zip with server installation of "AOO 4.1.0-Dev – English UI / German locale - [AOO410m1(Build:9750) - Rev. 1566800 - 2014-02-12]" on German WIN7 Home Premium (64bit)", own separate user profile. (I am not 100% sure concerning rev, meght be few days more early or later).