Fig 4. Original gray-scale picture, which is over-exposed (Camera set to +2 exposure level)
 
 
 
 

Fig 5. Corrected image using the pixel intensity curve for a photographic film
 
 
 
 
 

Fig 6. Corrected image using the pixel intensity linear curve for a digital camera
 
 
 
 
 

Fig 7. Corrected image using the pixel intensity curve fitted for the linear curve obtained for a digital camera