OptiPNG file type plugin (November 30, 2008)

I Like Pi · **Joined:** Wed Jun 20, 2007 2:23 am **Posts:** 185

This plugin integrates OptiPNG with Paint.NET. It optimizes PNG to make them smaller, which is good for web use.

Compiled DLL:

Attachment:

OptiPNG plugin.zip [105.29 KiB]
Downloaded 8524 times

Both the DLL and optipng.exe need to be in the FileTypes directory.

November 30 - updated to OptiPNG 0.62, some minor changes suggested by antond
October 24 - updated to OptiPNG 0.61, no changes in my code
June 20 - updated to OptiPNG 0.6, no changes in my code

Source Code:
License: GNU General Public License (GPL) v3

Attachment:

File comment: This is SOURCE CODE. Most of you want the compiled program above.

Source Code.zip [119.65 KiB]
Downloaded 573 times

Myrddin · **Posted:** Sat Oct 06, 2007 11:17 pm

Original - 57.2 KB

Attachment:

PNG_transparency_demonstration_1.png

OptiPNG file type plugin; RGB with alpha, compression 7 (basically the defaults which appeared) - 58.8 KB

Attachment:

PNG_transparency_demonstration_1 v2.png

(The black backgrounds are fully transparent).

Andrew D · **Posted:** Sat Oct 06, 2007 11:24 pm

Myrddin wrote:

Original - 57.2 KB

Attachment:

PNG_transparency_demonstration_1.png

OptiPNG file type plugin; RGB with alpha, compression 7 (basically the defaults which appeared) - 58.8 KB

Attachment:

PNG_transparency_demonstration_1 v2.png

(The black backgrounds are fully transparent).

Your kidding me, it makes it larger

I Like Pi · **Joined:** Wed Jun 20, 2007 2:23 am **Posts:** 185

Lots of Wikipedia's images are already optimized :wink:

Quote:

17:58, 17 August 2007 JeffyP 320×240 57 KB revert
17:39, 17 August 2007 JeffyP 320×240 44 KB Compressed even further
08:03, 15 October 2005 Txuspe 320×240 57 KB Compressed with PNGOUT.
00:45, 12 July 2005 Daniel G. 320×240 62 KB 24bit PNG with 8bit alpha layer Rendered in POV-Ray by user:ed_g2s. See also: Image:PNG transparency demonstration 1.png {{GFDL}}

Fisherman's Friend · **Posted:** Sat Oct 06, 2007 11:44 pm

Maybe we should do a little benchmark with new pictures.

Would be interesting to compare it with HD Photo, too.

I would do it, but I will not be here again until Monday, so please don't wait for me.

And thanks for the plugin, at least this is a good step.

Myrddin · **Posted:** Sat Oct 06, 2007 11:49 pm

Fair comment I Like Pi...

Original - 33.7 KB

OptiPNG file type plugin; RGB with alpha, compression 7 - 26.1 KB

--------------------------------------------

Original - 651 KB

Click for larger

OptiPNG file type plugin; RGB, compression 7, transparency threshold 0 - 394 KB

Click for larger

Well done, it works! Thank you very much, this will save considerable time. The slow speed I'll attribute to OptiPNG as all the PNG optimisers I've tried are reasonably slow, however, is there anything you can do about speed, especially when dealing with larger images?

I Like Pi · **Joined:** Wed Jun 20, 2007 2:23 am **Posts:** 185

Small update:

Changed default optimization level to 2 because it's OptiPNG's default
Added some more tooltips
Interlacing on/off

In the future, I may expose more of OptiPNG's command line options so users who know what they're doing can eshew OptiPNG's preset levels (which basically brute force a bunch of settings for the smallest size).
Problem is I don't fully understand the options.

Mr Frojo · **Posted:** Sun Oct 07, 2007 4:31 pm

Nice. This might be really usefull. Ive been using OptiPNG for a while now, and its great to see it integrated into Pdn.

Blooper · **Joined:** Fri Sep 14, 2007 11:09 pm **Posts:** 1953

Erm, it's an empty folder?

Bob · **Posted:** Mon Oct 08, 2007 7:46 pm

Working here.
Just redownload.

david.atwell · **Posted:** Mon Oct 08, 2007 9:15 pm

This is quite cool! I like it a lot, and it will certainly come in handy! Thanks!

Fisherman's Friend · **Posted:** Mon Oct 08, 2007 10:07 pm

I Like Pi wrote:

In the future, I may expose more of OptiPNG's command line options so users who know what they're doing can eshew OptiPNG's preset levels (which basically brute force a bunch of settings for the smallest size).
Problem is I don't fully understand the options.

If possible, it would be very nice to see this brute force thing (PNGauntlet has something similar) available. If you have problems you could make a beta, I'm sure you would find a lot of "testers", and maybe this would be a help.

Blooper · **Joined:** Fri Sep 14, 2007 11:09 pm **Posts:** 1953

Ok, it works now. Thanks to you, and to Bob

I Like Pi · **Joined:** Wed Jun 20, 2007 2:23 am **Posts:** 185

Fisherman's Friend wrote:

If possible, it would be very nice to see this brute force thing (PNGauntlet has something similar) available. If you have problems you could make a beta, I'm sure you would find a lot of "testers", and maybe this would be a help.

It already uses brute force. The defaults tell OptiPNG to brute force a bunch of filters and stuff. (This is what the "x trials" means.)
From OptiPNG documentation (the -ox corresponds to what this plugin uses):

Code:

Optimization level presets:
    -o0  <=>  -nz
    -o1  <=>  [apply libpng heuristics]         (1 trial)
    -o2  <=>  -zc9 -zm8 -zs0-3 -f0,5            (8 trials)
    -o3  <=>  -zc9 -zm8-9 -zs0-3 -f0,5          (16 trials)
    -o4  <=>  -zc9 -zm8 -zs0-3 -f0-5            (24 trials)
    -o5  <=>  -zc9 -zm8-9 -zs0-3 -f0-5          (48 trials)
    -o6  <=>  -zc1-9 -zm8 -zs0-3 -f0-5          (120 trials)
    -o7  <=>  -zc1-9 -zm8-9 -zs0-3 -f0-5        (240 trials)

(If anyone wants to improve anything, feel free to download the source code.)

Fisherman's Friend · **Posted:** Tue Oct 09, 2007 12:53 pm

I Like Pi wrote:

It already uses brute force. The defaults tell OptiPNG to brute force a bunch of filters and stuff. (This is what the "x trials" means.)

I see. I thought brute force would mean that it automatically detects the best settings for the picture. When I use PNGauntlet it displays something like "image doesn't fit into 256 color space, try RGB instead". Maybe I'm wrong and this isn't what brute force actually means...? Well, the reason why I asked was that PNGauntlet produced in some tests I made in a bunch of cases files that were around 10 KB smaller, and I thought that would be related to this brute force stuff. Using the file type plugin, you can select many options (like grayscale, RGB with alpha and so on), and my idea was that I used bad settings and as a consequence I got better results with PNGauntlet cause it searched for the best settings... To be honest I haven't looked if the settings of the file type plugin are chosen automatically or if it remebers the previous settings...?

If someone wants to make tests with PNGauntlet (rather useless for 10 poor KB, I think), please note that the release I got came with an outdated version of pngout (the commandline exe which PNGauntlet uses) and I had to download the actual version seperately.

Another question: Can there be a checkbox to disable the preview? I don't know how much the speed impact actually would be...?

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OptiPNG file type plugin (November 30, 2008)

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