The clahe() function is an inbuilt function in the Python Wand ImageMagick library which is used to contrast limited adaptive histogram equalization.
Syntax:
clahe(width, height, number_bins, clip_limit)
Parameters: This function accepts four parameters as mentioned above and defined below:
- width: This parameter stores the size of the region.
- height: This parameter stores the size of the region.
- number_bins: This parameter stores the histogram bins.
- clip_limit: This parameter stores the contrast limit.
Return Value: This function returns the Wand ImageMagick object.
Original Image:
Example 1:
# 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 clahe:
# Invoke clahe function
clahe.clahe(300, 200, 3.4, 2.7)
# Save the image
clahe.save(filename ='clahe1.jpg')
Output:
Example 2:
# 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 clahe function
pic.clahe(300, 200, 3.4, 2.7)
# Save the image
pic.save(filename ='clahe2.jpg')
Output:
