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Images quality (definition)

Images quality (definition)

Tuesday 01 December 2009 9:43:07 am - 5 replies

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Gaetano Giunta

Tuesday 01 December 2009 12:37:00 pm

I am sure you checked, but since you are not specifying the image variant, it might be that you are producing small-resolution images upscaled (badly) by the browser?

Principal Consultant International Business
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Catherine Mollet

Wednesday 02 December 2009 3:14:16 am

Thanks Gaetano. I didn't know, then you gave a direction to look at. I put

{attribute_view_gui attribute=$node.data_map.image image_class=articleimage}

in the template to have load a different image variation. Indeed, myimage_articleimage.jpg is loaded, but quality is still bad. Original image size is 24 ko and myimage_articleimage.jpg is 5 ko... Quite an awful compression.

Catherine Mollet

Wednesday 16 December 2009 9:01:51 am

Up...

Nicolas Pastorino

Monday 25 January 2010 10:29:49 am

Hello Catherine,

Did you make sure that the 'articleimage' transformation (defined in image.ini) is not applying quality-degrading filters ? And what image processing backend are you using ? ImageMagick or GD ?

You may want to give us the details of the 'articleimage' filter btw.

Let us know,

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Nicolas Pastorino
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Catherine Mollet

Thursday 28 January 2010 6:54:52 am

Hi Nicolas,

I guess it's GD, because in phpinfo(), I see that GD is enabled, and in settings/override/image.ini.append.php, there is

[ImageMagick]
IsEnabled=false

But, in extensions/myextension/settings/image.ini.append.php, there's

[ImageMagick]
Filters[]=centerimg=-gravity center -crop %1x%2+%3+%4

So I don't understand very well.

And for "articleimage", details are 

[articleimage]
Reference=
Filters[]
Filters[]=geometry/scaledownonly=170;350

Is that details you asked for ? I really don't know where to look at...

Thanks

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