On 11/20/2010 04:23 PM, bill purvis wrote:
> Hi,
> I've been using Gimp for a good while, but today I tried to edit a TIFF image
> of an old document with lots of speckles on it. No problem - use the despeckle
> tool! However, when I try to invoke it, all the enhance filters are greyed
> out. I then tried a similar file, this time a jpeg and the filters are all
> enabled. I then thought maybe it doesn't like to image type so I saved it as
> a PNG file, killed Gimp and restarted. The filters are still disabled.
> Can someone suggest why the filters are disabled for this image, and how I
> can fix it?
> Many thanks
> Bill

The image should be in RGB mode for these tools to work. Check Image -> 

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