Duplicate the top layer twice (Layer> Duplicate Layer or Ctrl+J).

Activate the top layer and apply a Motion Blur filter (Filter> Blur> Motion Blur). Set the angle to 45º and the distance to 100 pixels.

Apply an Auto Levels (Image> Adjustments> Auto Levels or Shift+Ctrl+L).

Now we're going to do the same steps againusing a different Motion Blur angle on a different layer. Activate the layer below (Layer 1 copy 2) and apply a Motion Blur filter (Filter> Blur> Motion Blur). Simply type a "-" sign in front of the 45º and click OK.

Apply an Auto Levels (Image> Adjustments> Auto Levels or Shift+Ctrl+L).

Add a Brightness/Contrast adjustment layer (Layer> New Adjustment Layer> Brightness/Contrast) and adjust the settings to get the results you want.
