Wand threshold() function – Python
Last Updated :
04 Oct, 2021
The threshold() function is an inbuilt function in the Python Wand ImageMagick library which is used to modify the image such that any pixel’s intensity value greater than the threshold is assigned the maximum intensity (white), or otherwise is assigned the minimum intensity (black).
Syntax:
threshold(threshold, channel)
Parameters: This function accepts four parameters as mentioned above and defined below:
- threshold: This parameter stores the threshold amount between 0 to 1.0.
- height: This parameter stores the height of the thumbnail image.
Return Value: This function returns the Wand ImageMagick object.
Original Image:
Example 1:
Python3
from wand.image import Image
with Image(filename = '../geeksforgeeks.png' ) as image:
with image.clone() as threshold:
threshold.threshold( 0.3 , 'green' )
threshold.save(filename = 'threshold1.jpg' )
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Output:
Example 2:
Python3
from wand.image import Image
from wand.drawing import Drawing
from wand.color import Color
with Drawing() as draw:
draw.stroke_color = Color( 'black' )
draw.stroke_width = 1
draw.fill_color = Color( 'white' )
draw.circle(( 200 , 200 ),
( 100 , 100 ))
draw.font = '../Helvetica.ttf'
draw.font_size = 30
with Image(width = 400 , height = 400 , background = Color( '# 45ff33' )) as pic:
draw.text( int (pic.width / 3 ), int (pic.height / 2 ), 'GeeksForGeeks !' )
draw(pic)
pic.threshold( 0.5 , 'green' )
pic.save(filename = 'threshold2.jpg' )
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Output:
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