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 , "w3wiki" ) # invoke draw() function im.draw(text) # invoke contrast() function im.contrast( 40 ) # invoke write function along with filename im.write( '1_b.png' ) |
Output: