Canon PowerShot SX400 IS Black Manual (en)

Correcting Image Brightness (i-Contrast)
 Still Images 
Before shooting, excessively bright or dark image areas (such as 
faces or backgrounds) can be detected and automatically adjusted 
to the optimal brightness. Insufficient overall image contrast can 
also be automatically corrected before shooting to make subjects 
stand out better.
Press the [
] button, 
choose [i-Contrast] on the 
] tab, and then choose [Auto] 
Once the setting is complete, [
is displayed.
Under some shooting conditions, correction may be inaccurate or 
may cause images to appear grainy.
You can also correct existing images (