How to do a radial blur in Gimp

RadialBlurInGimp.md

#How to do a radial blur in Gimp

Gimp as some function to do blur effects, but it is not clear how to do a radial blur : Blur part of an image, starting from a point, with a radius, and the effect beeing less and less strong the farer we are from the central point.

Here is a sample .

Here is the solution :

• start with an unblur image.
• copy the layer
• on the top layer apply a gaussian blur : "filter -> blur -> gaussian blur". Change parameters so that the image is blurry as you want. This settings would be the blurriest of your final image.
• on the top layer , right click and "add layer mask". On the settings, choose Black
• select gradiant tool, in shape, choose radial. the tools work this way : you select center point, and then the radius. You will probably need some trial and erros before getting the exact effect you want. the Offset is a good option to play with. Still, it's porbably better not to have a big offset, and use a big radius.

Thanks for the help!

(Probably is spelled wrong in the last sentence of the last bullet)

I tried this and it works, but for other people searching for this, "Radial blur" can actually mean three slightly different things:

• A basic flat non-motion blur effect but with blur applied more heavily the further you are away from the specified point. That's what this achieves.
• A motion blur effect as if caused by rotation of the camera/object. So you get a kind of streakiness to the blurring running in circles around your specified point. This is available under the "Filters"->"Blur"->"Motion blur"->"Radial". See this video tutorial

• A motion blur effect as if caused by zoom of the camera or the object and camera moving towards/away the background scenery. So you get a kind of streakiness to the blurring running in lines towards/away radially from the specified point. This is also available under the "Filters"->"Blur"->"Motion blur"->"Zoom". Here's an example of that:

Thank you thank you! "Filters"->"Blur"->"Motion blur"->"Zoom" is exactly what I was looking for in a radial blur. The other I would call an azimuthal blur, but realize that term is quite uncommon outside of science circles .