Pgmagick contrast() method – Python

The contrast() function is an inbuilt function in the Pgmagick library which is used to enhance or reduce the contrast of the image. The function returns the true value on success. 

Syntax:

contrast(multiplier)

Parameters: This function accepts a single parameter multiplier which is the factor by which the contrast of image should increase or decrease.
Return Value: This function returns the Pgmagick object with image added. 

Input Image:

Example 1:

Python3

from pgmagick import Image, DrawableCircle, DrawableText
from pgmagick import Geometry, Color

# draw the image of dimension 600 * 600
img = Image('input.png')

# invoke contrast() function
img.contrast(27)

# invoke write function along with filename
img.write('2_a.png')

Output:

Example 2: 

Python3

# import library
from pgmagick import Image, DrawableCircle, DrawableText
from pgmagick import Geometry, Color

# Draw image of dimension 600 * 600 having background green
im = Image(Geometry(600, 600), Color("# 32CD32"))

# invoke DrawableCircle() function
circle = DrawableCircle(100, 100, 300, 20)

# invoke draw() function
im.draw(circle)

# set font size to 40px
im.fontPointsize(40)

# invoke DrawableText() function
text = DrawableText(250, 450, "GeeksForGeeks")

# invoke draw() function
im.draw(text)

# invoke contrast() function
im.contrast(40)

# invoke write function along with filename
im.write('1_b.png')

Output: