Learn to enhance an image in Photoshop with ease
Open your file.
Press control+j to duplicate the layer. Change the layer mode to ‘Screen’.
Go to filter>noise>Median and give these values :-
Image after applying Median filter.
Click on Add mask button to create a layer mask.
Go to Image>Apply Image and apply these values :-
Image after applying ‘Apply Image’.
Go to filter>others>High Pass and give maximum radius value.
Group and merge all the layers. Our new image is ready. Compare the original and enhanced image.
Before 
After 
