Hi all,
I have set the quality factor to 0.1 inside the pull requests.
Cheers,
Nicola.
2014-03-07 11:11 GMT+01:00 Nicola Lagomarsini <
nicola.lagomars...@geo-solutions.it>:
> Hi Andrea,
>
> the quality parameter can be configured inside the application context for
> the PNGEncoder inside the gwc-wms and gs-gwc modules. By setting for
> example the quality parameter to 0.1 the image size is considerably reduced.
>
> About the hints considerations I have used different hints for each
> configuration, so I think that this similarity between speed and default
> configuration could be associated to a similar hints behaviour.
>
> Below are listed the hints for each configurations.
>
> Speed:
> KEY_COLOR_RENDERING = VALUE_COLOR_RENDER_SPEED;
> KEY_ANTIALIASING = VALUE_ANTIALIAS_OFF;
> KEY_FRACTIONALMETRICS = VALUE_FRACTIONALMETRICS_OFF;
> KEY_ALPHA_INTERPOLATION = VALUE_ALPHA_INTERPOLATION_SPEED;
> KEY_INTERPOLATION = VALUE_INTERPOLATION_NEAREST_NEIGHBOR;
> KEY_RENDERING = VALUE_RENDER_SPEED;
> KEY_TEXT_ANTIALIASING = VALUE_TEXT_ANTIALIAS_OFF;
> KEY_STROKE_CONTROL = VALUE_STROKE_PURE;
>
> Default:
> KEY_COLOR_RENDERING = VALUE_COLOR_RENDER_DEFAULT;
> KEY_ANTIALIASING = VALUE_ANTIALIAS_DEFAULT;
> KEY_FRACTIONALMETRICS = VALUE_FRACTIONALMETRICS_DEFAULT;
> KEY_ALPHA_INTERPOLATION =VALUE_ALPHA_INTERPOLATION_DEFAULT;
> KEY_RENDERING = VALUE_RENDER_DEFAULT;
> KEY_TEXT_ANTIALIASING = VALUE_TEXT_ANTIALIAS_DEFAULT;
> KEY_STROKE_CONTROL = VALUE_STROKE_DEFAULT;
>
> Quality:
> KEY_COLOR_RENDERING = VALUE_COLOR_RENDER_QUALITY;
> KEY_ANTIALIASING = VALUE_ANTIALIAS_ON;
> KEY_FRACTIONALMETRICS = VALUE_FRACTIONALMETRICS_ON;
> KEY_ALPHA_INTERPOLATION = VALUE_ALPHA_INTERPOLATION_QUALITY;
> KEY_INTERPOLATION = VALUE_INTERPOLATION_BILINEAR;
> KEY_RENDERING = VALUE_RENDER_QUALITY;
> KEY_TEXT_ANTIALIASING = VALUE_TEXT_ANTIALIAS_ON;
> KEY_STROKE_CONTROL = VALUE_STROKE_NORMALIZE;
>
> Cheers,
> Nicola.
>
>
>
>
>
>
> 2014-03-07 10:32 GMT+01:00 Andrea Aime <andrea.a...@geo-solutions.it>:
>
> On Fri, Mar 7, 2014 at 10:28 AM, Nicola Lagomarsini <
>> nicola.lagomars...@geo-solutions.it> wrote:
>>
>>> Hi all,
>>>
>>> I'm going to show some images for comparing the old wmsTileFuser class
>>> and its modified version, both in *fullWMS* mode enabled.
>>>
>>> I made the *fullWMS* parameter configurable from the geowebcache.xml
>>> file by adding the <fullWMS>TRUE(or FALSE)</fullWMS> field.
>>>
>>> I added the possibility for the user to change the image quality by
>>> setting an additional WMS parameter called *hints*. The user can choose
>>> one of the 3 following values: *speed*, *default*, *quality*.
>>>
>>> The first image represents the result of a WMS request on a vectorial
>>> layer, in image/png format. The other 3 images represent the same WMS
>>> request with the new WMS parameter.
>>>
>>> The second image value represents the result with the *speed* value
>>> which takes minor time without any care about the quality.
>>> The third image (*default* value selected) provides a better image
>>> quality but requires more time than the *speed* configuration.
>>> The last image with the *quality* value takes more time than the others
>>> but the final image has the best quality between the 4 images.
>>>
>>> From the results, in fact, it is easy to note that the image created
>>> with the *quality* hints has a better quality than that returned by the
>>> old WMSTileFuser class.
>>>
>>> I hope this could help to review the pull requests.
>>>
>>> P.S. The images are too big to be sent by mail, I add the following
>>> links for download:
>>>
>>> old wms request:
>>> https://drive.google.com/file/d/0B_H-B1p4qGi6VVgyVGJPYVV1c1hBMDMzakhPRTZlQTdzRFl3/edit?usp=sharing
>>> new wms request with speed hints:
>>> https://drive.google.com/file/d/0B_H-B1p4qGi6MEhJR1NxTkV2Tnh0Y3Zza2JJdHNtY0RhZVN3/edit?usp=sharing
>>> new wms request with default hints:
>>> https://drive.google.com/file/d/0B_H-B1p4qGi6bk5adnNYN2NjRUk/edit?usp=sharing
>>> new wms request with quality hints:
>>> https://drive.google.com/file/d/0B_H-B1p4qGi6b1RTYktBSjBtYlpOdGdFS3NVWkVIb1Rzd3g4/edit?usp=sharing
>>>
>>>
>> Hi Nicola,
>> I'm looking at the outputs, and finding something strange. The quality
>> one is definitely much better, for sure, however:
>> * the new images are ~20 times larger than the oldwms one (from 34kb to
>> 758KB), something is wrong with the png compression parameters I suppose
>> * I cannot see any difference, visually, between oldwms, new with speed,
>> and new with default
>>
>> Cheers
>> Andrea
>>
>> --
>> == Our support, Your Success! Visit http://opensdi.geo-solutions.it for
>> more information ==
>>
>> Ing. Andrea Aime
>> @geowolf
>> Technical Lead
>>
>> GeoSolutions S.A.S.
>> Via Poggio alle Viti 1187
>> 55054 Massarosa (LU)
>> Italy
>> phone: +39 0584 962313
>> fax: +39 0584 1660272
>> mob: +39 339 8844549
>>
>> http://www.geo-solutions.it
>> http://twitter.com/geosolutions_it
>>
>> -------------------------------------------------------
>>
>
>
>
> --
> ==
> Our support, Your Success! Visit http://opensdi.geo-solutions.it for more
> information.
> ==
>
> Ing. Nicola Lagormarsini
> Junior Software Engineer
>
> GeoSolutions S.A.S.
> Via Poggio alle Viti 1187
> 55054 Massarosa (LU)
> Italy
> phone: +39 0584 962313
> fax: +39 0584 1660272
>
> http://www.geo-solutions.it
> http://twitter.com/geosolutions_it
>
> -------------------------------------------------------
>
--
==
Our support, Your Success! Visit http://opensdi.geo-solutions.it for more
information.
==
Ing. Nicola Lagormarsini
Junior Software Engineer
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
http://www.geo-solutions.it
http://twitter.com/geosolutions_it
-------------------------------------------------------
------------------------------------------------------------------------------
Subversion Kills Productivity. Get off Subversion & Make the Move to Perforce.
With Perforce, you get hassle-free workflows. Merge that actually works.
Faster operations. Version large binaries. Built-in WAN optimization and the
freedom to use Git, Perforce or both. Make the move to Perforce.
http://pubads.g.doubleclick.net/gampad/clk?id=122218951&iu=/4140/ostg.clktrk
_______________________________________________
GeoTools-Devel mailing list
GeoTools-Devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geotools-devel
