Digital Editing of Engineering Images
Emphasizing subject and content

 

A presentation to the Department of Civil Engineering
University of Hong Kong
January 7, 1999

 

Kirk Martini
Assistant Professor of Architecture and Civil Engineering
University of Virginia

 

 

 

 

 

 

 

 

Basic Techniques

Note that all the examples in this presentation follow the CIVCAL specification for image size:
Adjust curves for more contrast in dark regions
Use overlay to restore detail to bright regions

Crop and adjust exposure

 

 

 

 

 

 

 

 

 

 

 


Use overlay to restore bleached detail

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Possibly a bit too much exposure adjustment

 

 

 

 

 

 

 

 

 

 

 

 

 


Extracted detail

 

 

 

 

 

 

 

 

 

 

 

 

 


Proper exposure depends on what detail is important.
This exposure brings out the materials on the deck.		 





 



 



 



 



 



 



 



 



 



 



 



 






  

    

    Image quality is good, but the image is rotated		
  


















 



 



 






  

    
  

  

    

    Rotate and crop to restore proper orientation		
  












 



 



 



 



 










 






  

    
    
  

  

    Note buildings in background
    Note orientation of sloped column
  














 



 



 



 













 



 



 



 



 



 






  

    

    Note the orientation of buildings in the background		
  







 



 



 



 



 



 



 



 



 






  

    

    Note that rotation blanks lower left and upper right corners		
  







 



 



 



 






  

    

    Blank corners filled in (better looking, but fasifies the
    data)		
  







 



 



 



 






  

    

    Mask can highlight image features		
  







 



 



 



 



 



 



 



 



 






Summary