New answers tagged black
Another approach would be to invert the colors (CTRL+I), then add a new layer of pure white (or the gradient @JohnnyKutnowski suggested). Reduce the white layer's opacity slightly to let the image show through. I set my white layer's opacity to 88% and this is the result:
I think your approach isn't the right one in this case. To achieve what you see in the second image, I would go for a gradient map on the original image with a gray to white gradient. I'm sure that's exactly how they got to that result. It's easy to do, just add a Gradient Map Adjustment Layer, and choose the colours in the gradient selector. That being ...
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