Wand canny() function - Python Last Updated : 19 May, 2021 Summarize Comments Improve Suggest changes Share Like Article Like Report The canny() function is an inbuilt function in the Python Wand ImageMagick library which is used to detect edges by leveraging a multi-stage Canny algorithm. Syntax: canny(radius, sigma, lower_percent, upper_percent) Parameters: This function accepts two parameters as mentioned above and defined below: radius: This parameter stores the radius of the gaussian filter.sigma: This parameter stores the standard deviation of the gaussian filter.lower_percent: This parameter which stores the normalized lower threshold.upper_percent: This parameter which stores the normalized upper threshold. 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 canny: # Invoke canny function canny.canny(3, 2, 0.2, 0.8) # Save the image canny.save(filename ='canny1.jpg') 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 canny function pic.canny(4, 2, 0.3, 0.7) # Save the image pic.save(filename ='canny2.jpg') Output: Comment More infoAdvertise with us Next Article Wand canny() function - Python S sarthak_ishu11 Follow Improve Article Tags : Python Image-Processing Python-wand Practice Tags : python Similar Reads Wand chop() function - Python The chop() function is an inbuilt function in the Python Wand ImageMagick library which is used to remove a region of an image. Syntax: chop(width, height, x, y) Parameters: This function accepts four parameters as mentioned above and defined below: width: This parameter stores the size of the regio 2 min read Wand enhance() function - Python The enhance() function is an inbuilt function in the Python Wand ImageMagick library which is used to apply digital filter to reduce noise. Syntax: enhance() Parameters: This function does not accept any parameter.Return Value: This function returns the Wand ImageMagick object. Original Image: Examp 2 min read Wand arc() function in Python arc() is a function present in wand.drawing module. arc() function draws an arc in the image. Youâll need to define three pairs of (x, y) coordinates. First & second pair of coordinates will be the minimum bounding rectangle, and the last pair define the starting & ending degree. Syntax : wa 2 min read Wand blur() function - Python The blur() function is an inbuilt function in the Python Wand ImageMagick library which is used to blur the image. Syntax: blur(radius, sigma, channel) Parameters: This function accepts three parameters as mentioned above and defined below: radius: This parameter is used to specify the value of radi 2 min read Wand flip() function - Python The flip() function is an inbuilt function in the Python Wand ImageMagick library which is used to create a vertical mirror image by reflecting the pixels around the central x-axis. Syntax: flip() Parameters: This function does not accept any parameters.Return Value: This function returns the Wand I 2 min read Like