The local_contrast() function is an inbuilt function in the Python Wand ImageMagick library which is used to increase light-dark transitions within the image.
Syntax:
local_contrast(radius, strength)Parameters: This function accepts two parameters as mentioned above and defined below:
- radius: This parameter is used to store the size of the Gaussian operator. Default value is 10.0
- strength: This parameter is used to store the percentage of blur mask to apply. Default value is 12.5 and it can range from 0 to 100.
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 imagewith Image(filename ='../neveropen.png') as image: # Clone the image in order to process with image.clone() as local_contrast: # Invoke local_contrast function with radius 12 and sigma 3 local_contrast.local_contrast(12, 3) # Save the image local_contrast.save(filename ='local_contrast1.jpg') |
Output:
Example 2:
Python3
# Import libraries from the wand from wand.image import Imagefrom wand.drawing import Drawingfrom wand.color import Colorwith 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 local_contrast function with radius 15 and sigma 78 pic.local_contrast(15, 78) # Save the image pic.save(filename ='local_contrast2.jpg') |
Output:
