Blurring the edges in a composite...

Hi

I am doing a simple photo replacement in a scene.
I have done the tracking and corner pinned the photo into the shot.

I need to blur/soften the edges of that photo to make it blend better...

Any help would be great!

Yes I am a noob...

Cheers in advance
Mat

The easy way: In Reactor, there is an EdgeBlur macro. Give it the composite in the main yellow input and the alpha for your photo in the green input. Then adjust the controls to taste.

The slightly more complex, but more rewarding way (this is exactly what's in the macro): Use a Filter node in Sobel mode to find the edges of the alpha. Use an ErodeDilate and a Blur to adjust the width and softness of the matte it creates. This matte is used as a mask on a Blur of the composite.

Hey thanks!

I will try the more complex way as I'm guessing I will be using this alot!

Cheers
Mat