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Adjusts the lightness or 

darkness of an image.  The 

higher the value, the brighter 

the image. 

   Contrast 

Adjusts the range between 

the darkest and the lightest 

shades in the image.  The 

higher the contrast, the 

bigger the different grayscale.  

 

 

 

 

 

 

 

Decrease Brightness 

Normal 

Increase Brightness 

 

 

 

 

Decrease Contrast 

Normal 

Increase Contrast