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How do I invert the lens blur effect

I have a very crisp photo of a long narrow room, taken at an angle with the far corner in the centre of the image with a very narrow aperture.

I want to use it as a back drop for a green screen video where the speaker is sharp, centre of the image.

That means I need the sides slightly in focus, but the centre blurred because it is much farther away.

Every tutorial is about getting the centre in focus, and the sides blurry. I need the opposite.

What’s the way I do this?

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解決に役立った回答 davescm

Try the Lens Blur filter with a depth map

To do that :

Add a layer mask revealing the areas you want to blur - remember a layer mask can be a gradient not just black or white

Go to Filter > Lens Blur

In depth map select "layer mask"

Adjust the blur

Hit OK

Disable the layer mask

Dave

Inspiring

Excellent Dave, right answer, perfect.

If you want to see it in action in all its graduated beauty you can see it in the background here: Mutiny Interview Nick Fawbert February 2018 1080p on Vimeo

解決！

Community Expert

Try the Lens Blur filter with a depth map

To do that :

Add a layer mask revealing the areas you want to blur - remember a layer mask can be a gradient not just black or white

Go to Filter > Lens Blur

In depth map select "layer mask"

Adjust the blur

Hit OK

Disable the layer mask

Dave

Inspiring

Thanks Dave

That gradient layer mask sound interesting - I shall try and find a tutorial

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