When using get_serving_url(user.photoBlobKey) to return an image URL from the GAE Blobstore, the Google Images API returns a JPEG image with quality = 70 and size = 512px as default.
Is there any way to increase the default JPEG quality returned by get_serving_url()?
There's an undocumented URL parameter l, you can add it to the end of the image URL like so: =l100 (or =s640-l70 if you have another param before it) that should modify the output quality of the JPEG. Seems to be =l1 to =l100.
See also: List of all the App Engine images service get_serving_url() URI options
No there is not.
If you think it's a useful feature you can add an item to the issue tracker, from there the team will assess the demand for implementing it.
you can't control the output quality but by requesting
get_serving_url(user.photoBlobKey, size=0)
you will get the original size of the image up to 1600px height and width.
the returned url will be automatically postfixed with =s0 which you could add also before rendering the image in the template for example.
