Brightness

Adjust the brightness and contrast of the image using a polynomial tone curve.

Syntax

Command	Argument Format
brightness	<brightness>x<contrast>

Behavior

This command applies a tone curve.

• <brightness> controls the image's midpoint intensity.
  • Value is -100 and 100. 0 is no change, 100 is maximum brightness (effectively all white image).
• <contrast> controls the slope of the curve (i.e. how stretched the values are).
  • Value is -100 and 100.

Common Examples

Brighten at 5, contrast at 20:

/v5/brightness/5x20/?url=pexels-photo-1539116.jpeg

Original on the left, brightened and contrast increased on the right:

Brightness decreased, contrast increased:

/v5/brightness/-5x5/?url=pexels-photo-1539116.jpeg

tip

If you only care about brightness, you can use brightness/60x0