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Best Way to Create Blur

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topher944Best Way to Create Blur
by on May 18, 2007 at 11:08:35 pm

I've got to blur some unwanted names/logos form Tshirts. What's the most efficient way to create a specific area blur. Is it in Boris or AE. Could you list the steps as I'm about to resort to drooling and thumb sucking from this recently imposed deadline. Haven't needed diapers yet! Thanks for your time and knowledge. Kind Regards, Chris K.

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Kieran MatthewRe: Best Way to Create Blur
by on May 19, 2007 at 1:11:46 am

Hi Chris,

I do this regularly in Boris RED, but you could use FX.

This is how I do it in RED,

1. Create a composition in the gfx layer above your clip
2. Edit the composition (i.e. launch RED)
3. create a new track as a spline primitive, I usually use the oval shape.
4. Using the scale controls make the shape the right size to cover the offending logo/face/sweat mark (I kid you not)
5. apply Basic Blur from the filters menu to give the shape a soft edge, adjust to taste.
6. create a new track as video 1, apply Basic Blur
7. move the spline primitive track into the MASK track of the blurred video track
8. You should now have blurred video in the shape of your spline primitive over the top of your clean video.
9. Adjust the blur of the video to taste.
10. Use the motion tracker to track the shape(rather than the blured video track) to the thing you are covering up.

Now, you can also use the painting tools in RED to paint the shape you want, or you can create the shape in say photoshop and import it as a still image with an alpha channel - useful if you have only FX rather than RED. Hell, you can even use a big full stop from the text generator, all you need is the shape.

Of course you can do all this in AE if you want and probably in broadly the same way.


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topher944Thanks! Worked Perfect!
by on May 22, 2007 at 4:11:12 pm

Thanks! Worked Perfect!

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tankboyRe: Best Way to Create Blur
by on May 24, 2007 at 1:00:42 am

Hi Kieran,

this was a very timely post for me because I happen to be doing abit of this for the first time myself.

Thanks for your instructions. Evreything works really well. Except I think there must be a alpha chanel box I forgot to tick or something because the blurred area is black and doesn't seem to carry the alpha video through it. If you know what I mean?

I tried decreasing the opacity in the FX layer but that exposes the face I'm trying to blur.
Any hints as to what I might have missed?

I'm using FX to do this. Thanks in advance for any advice you can give.


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Kieran MatthewRe: Best Way to Create Blur
by on May 24, 2007 at 10:29:20 am

Hi Tankboy,

I've responded on your other thread.



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