Adding more clearness to vague image is difficult. One way is ‘High Pass’.
- Choose the layer witch you want to add clearness.
- ‘Copy’ this layer.
- Change the mode of copy layer from ‘Normal’ to ‘Overlay’.
- Go to ‘Filter’
- Choose ‘Convert for Smart Filters’. By this, if you must change the setting later, you can change only the setting without making any change to the original layer.
- Go to ‘Other’ and ‘High Pass’.