Wand function() function in Python

function() function is similar to evaluate function. In function() function pixel channels can be manipulated by applis a multi-argument function to pixel channels.
Following are the list of FUNCTION_TYPES in Wand:

• ‘undefined’
• ‘arcsin’
• ‘arctan’
• ‘polynomial’
• ‘sinusoid’

Syntax :

wand.image.function(function, arguments, channel)

Parameters :

Parameter	Input Type	Description
function	collections.abc.Sequence	a sequence of doubles to apply against function
arguments	numbers.Real	Number to calculate with operator
channel	basestring	Optional channel to apply operation on.

Example 1:

Source Image:

filter_none

edit
close

play_arrow

link
brightness_4
code

# Import Image from wand.image module from wand.image import Image    frequency = 3 phase_shift = -90 amplitude = 0.2 bias = 0.7    # Read image using Image function with Image(filename ="koala.jpeg") as img:     # appying sinusoid FUCTION_TYPE     img.function('sinusoid', [frequency, phase_shift, amplitude, bias])     img.save(filename ="kl-functioned.jpeg")

chevron_right

filter_none

Output :

Example 2:

Sorce Image:

filter_none

edit
close

play_arrow

link
brightness_4
code

# Import Image from wand.image module from wand.image import Image    frequency = 3 phase_shift = -90 amplitude = 0.2 bias = 0.7    # Read image using Image function with Image(filename ="road.jpeg") as img:     # appying sinusoid FUCTION_TYPE     img.function('polynomial', [frequency, phase_shift, amplitude, bias])     img.save(filename ="rd-functioned.jpeg")

chevron_right

filter_none

Output :

Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course.

My Personal Notes arrow_drop_up

Save

Recommended Posts:

• Wand selective_blur() function in Wand python
• Python - Read blob object in python using wand library
• Wand image - Baseimage.kuwahara() function in Python
• Wand image.edge function in Python
• Wand gaussian_blur() function in Python
• Wand transform() function in Python
• Wand crop() function in Python
• Wand rotational_blur() function in Python
• Wand - blur() function in Python
• Python - Image() function in Wand
• Python - clone() function in wand library
• Python - shade() function in Wand
• Python - sharpen() function in Wand
• Wand adaptive_sharpen() function in Python
• Python - noise() function in Wand
• Python - blue_shift() function in Wand
• Python - color_matrix() function in Wand
• Wand unsharp_mask() function - Python
• Wand colorize() function - Python
• Wand fx() function - Python

---

RahulSabharwal

Hi there I am a student of CGC COE, Landran in CSE department and have a great interest in programming

---

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.