Open up the image that you want to create the effect with – I’ve used a portrait in this case.
Duplicate the layer so you’ve got the original, you can always look at how it first looked that way.
I wanted to blur everything around the face so I roughly used the ellipsis tool to outline her head. I inverted the selection and then added a 5px Gaussian blur.
Now to add a curves adjustment layer, use all red, green and blue channels like the image below.
Finally I added a diagonal gradient from black to white from the left top corner to the bottom right, I changed the blending mode to Soft Light and the scale to 125%.