What benefit .png over .jpg?

[Kevin Fries]

.PNG is not a replacement for. JPG, but instead is a replacement for. GIF.
.PNG files can have transparent backgrounds and are well optimized for
icons, clipart, or other smaller images.  JPG is better suited to pictures.

As for the thumbnails, that is probably Nautilus or a image viewer doing
that so that it can cache the preview so it does not have to calculate it
on the fly.  Making small previews is an expensive operation, so the system
caches them.  If you delete it, the system will recreate them if you
preview that directory again.

Kevin
 On Oct 4, 2012 4:43 PM, <joe at actionline.com> wrote:

> What (if anything) is the benefit of .png image files over .jpg image
> files?
>
> I can't see any difference in image quality and .png files are 10 times
> (or more) bigger than .jpg files.
>
> Also, what is the reason or benefit of having hundreds of thumbnail .png
> images in the /home/username/.thumbnails directory?  Is there any reason
> not to delete all those?
>
>
>
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