Wordpress images

What recomendable size should i choose when uploading an image to a worpress site, so that when i open the image on a mobile application it does not have to consume too much bandwidth but still maintain some quality.

Best Regards.
BrunoSurpriseAsked:
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dcowleyCommented:
Bruno,

were you asking what size (meaning dimensions: height and width) or size (meaning: file size)?

If you're talking file size then the answers above are probably adequate, if you mean dimensions, then it really depends on which mobile devises you're targeting.  Most phones don't have great resolution, so if the image is going to be displayed full screen on them (iPhone 4: 640x920).  But then you've got devices coming out all the time like the new iPad which is 2048x1536...

Of course the classic solution to both problems is using thumbnails of higher resolution images and allowing a user to view the higher resolution version by clicking (or other interaction).  This addresses both the issue of having enough resolution and conserving bandwidth for those not interested in seeing the higher resolution version.
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Jason C. LevineNo oneCommented:
There really isn't a good answer to this because the size of the image depends on many different things:

1) Color depth
2) DPI
3) Desired quality
4) Will the image be zoomed?

etc.

As a rule of thumb, you want the file size as small as possible while still providing good quality.  Shoot for a few hundred KB for color photos.
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Alicia St RoseOwner & Principle Developer/DesignerCommented:
And once you save the image to it's smallest file size, check out the plugin called Smush.it.
It will compress the image even more (if it's possible) and retain the quality.
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Alicia St RoseOwner & Principle Developer/DesignerCommented:
dcowley's suggestion is sound, but make sure that you don't take a high rez image and shrink it down to a thumbnail. The file info is still there lurking in the thumbnail. You have to make scaled down thumbnails.

A lot of folks end up stuffing 300px< x 300px< pngs into a postage stamp. It's still a problem..
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Jason C. LevineNo oneCommented:
Why can't we all just go back to using Lynx?  No fuss, no images.

:)
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