The white_threshold() function is an inbuilt function in the Python Wand ImageMagick library which is used to force all pixels above the threshold into white while leaving all pixels below the threshold unchanged.
Syntax:
white_threshold(color)Parameters: This function accepts single parameters as mentioned above and defined below:
- color: This parameter stores the value of the color as string like ‘green’, ‘white’, ‘red’.
Return Value: This function returns the Wand ImageMagick object.
Original Image:
Example 1:
Python3
# Import library from Image from wand.image import Image
# Import the image with Image(filename = '../geeksforgeeks.png' ) as image:
# Clone the image in order to process
with image.clone() as white_threshold:
# Invoke white_threshold function with "Green" color
white_threshold.white_threshold( "green" )
# Save the image
white_threshold.save(filename = 'white_threshold1.jpg' )
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Output:
Example 2:
Python3
# Import libraries from the wand from wand.image import Image
from wand.drawing import Drawing
from wand.color import Color
with Drawing() as draw: # Set Stroke color the circle to black
draw.stroke_color = Color( 'black' )
# Set Width of the circle to 2
draw.stroke_width = 1
# Set the fill color to 'White (# FFFFFF)'
draw.fill_color = Color( 'white' )
# Invoke Circle function with center at 50, 50 and radius 25
draw.circle(( 200 , 200 ), # Center point
( 100 , 100 )) # Perimeter point
# Set the font style
draw.font = '../Helvetica.ttf'
# Set the font size
draw.font_size = 30
with Image(width = 400 , height = 400 , background = Color( '# 45ff33' )) as pic:
# Set the text and its location
draw.text( int (pic.width / 3 ), int (pic.height / 2 ), 'GeeksForGeeks !' )
# Draw the picture
draw(pic)
# Invoke white_threshold function with "red" color
pic.white_threshold( "red" )
# Save the image
pic.save(filename = 'white_threshold2.jpg' )
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Output: