Back in the day 2006? I think gradients and other things were rasterized by adobe (and maybe other) tools. 
I would suggest trying a gauss blur, with an unsharp mask to get back some edges. But I think once it's been rasterized, you'd have to reconstruct the gradients by sampling/math.
 
HTH
 
Sent: Monday, April 15, 2019 at 9:28 AM
From: "Tyler Durden" <8thrule@...155...>
To: "Inkscape User Community" <inkscape-user@lists.sourceforge.net>
Subject: Re: [Inkscape-user] Repairing a pixellated drop-shadow gradient
Hi Peter,
 
I examined the file.  It looks very much like it was processed as a pdf prior to re-conversion to SVG.
 
You can select the largest group, then ungroup a number of times to get the objects completely separated (watch the information area in the status bar at the bottom of the screen). You can also see an inventory of all objects in the Objects dialog (Menu: Object>Objects). Once you ungroup repeatedly until there are no more groups, you can proceed.
 
You will find a number of embedded images used as clipping objects; they can be deleted without issue.
 
Chime back and keep us posted.
 
Have a nice day.
TD
 
On Mon, Apr 15, 2019 at 9:01 AM Peter Flynn <peter@...2714...> wrote:
On 15/04/2019 01:13, brynn wrote:
>> If I could actually select the drop-shadow it would be a start.

The file is at http://xml.silmaril.ie/downloads/xmlss-cropped.svg

> It should be selectable.  You would not be able to select the pixels. 

Surely if the drop-shadow was a bitmap I *would* be able to select the
pixels?

> But you should be able to select the object - the raster image.   

Nope...clicking on any part just selects the entire thing.

> (Status bar will say "Image....")  Just move the whole thing to the
> side, temporarily.  After you get the color from it, you can delete it.
>
> If you can't select it alone, check the status bar.  I would guess it
> says "Group....".  So Ungroup, deselect everything, and try to select it
> again.

Useful, thanks. But Ungroup has no effect.

It's weird. I've used Inkscape on and off for years to fix vector
graphics, and never had this problem.

Thanks so much for all your help.

///Peter


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