Wand gamma() function in Python

gamma() allows us to adjust the luminance of an image. Resulting pixels are defined as pixel^(1/gamma). The value of gamma is typically between 0.8 & 2.3 range, and value of 1.0 will not affect the resulting image.

Parameters :

Parameter	Input Type	Description
adjustment_value	numbers.Real	value to adjust gamma level.
channel	basestring	optional channel to apply gamma correction.

Example:

Source Image:

# Import Image from wand.image module
from wand.image import Image

# Read image using Image function
with Image(filename ="koala.jpeg") as img:
    img.gamma(1.35)
    img.save(filename ="kl-gamma.jpeg")

Output :

Example 2: Increasing adjustment_value to 1.75.

# Import Image from wand.image module
from wand.image import Image

# Read image using Image function
with Image(filename ="koala.jpeg") as img:
    img.gamma(1.75)
    img.save(filename ="kl-gamma2.jpeg")

Output :