Use Levels adjustment on an image
All of your image tones can be adjusted and you can also make subtle color adjustments. Apply the linear formula a * input + b
to the image to adjust image levels.
Params
A (a), B (b)
- A - Multiplier.
a
is an alias of this parameter. - B - Offset.
b
is an alias of this parameter.
The minimum parameter for A and B is 0 and the maximum is 50. 1 is the default for parameter A. 0 is the default for parameter B.