[Gimp-user] 8 and 1 bit images

I have heard about Gaussian blur but not sure how it is implemented.
In my ignorance wouldn't it apply the same all over the image? What if
I want a wider section of 'graduation' than others.
For example (and what I am attempting to achieve) a coast line where
the deep water starts at the edge of the land in some areas and in
others there is a gradual deepening of water from the edge of land to
say 500 feet from the shore.
Consider the attached image of a coastline and on the left you see
deep water extending from the land and on the right side the water
gradually becoming deeper.

Gaussian blur is in Filters -> Blur -> Gausian and you get some idea of the
effect in the preview. It does apply the same over the whole image or selection
so it can be constrained that way.

Beginning to forget the original question but using a gimp layer mask as an

1. The mask painted with hard edges

2. After gaussian blur applied

3. The mask applied in Gimp.

Experiment with Gimp, there are no hard-and-fast rules. Stick with your known
procedures and try out other ways, then compare.

rich: www.gimp-forum.net

* http://www.gimpusers.com/system/attachments/703/original/blur01.jpg
* http://www.gimpusers.com/system/attachments/704/original/mask.jpg
* http://www.gimpusers.com/system/attachments/705/original/inplace.jpg

rich404 (via www.gimpusers.com/forums)

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