Related Articles

# Wand function() function in Python

• Difficulty Level : Easy
• Last Updated : 19 Jul, 2021

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 :

Example 1:
Source Image: ## Python3

 `# 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:``    ``# applying sinusoid FUCTION_TYPE``    ``img.function(``'sinusoid'``, [frequency, phase_shift, amplitude, bias])``    ``img.save(filename ``=``"kl-functioned.jpeg"``)`

Output : Example 2:
Sorce Image: ## Python3

 `# 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:``    ``# applying sinusoid FUCTION_TYPE``    ``img.function(``'polynomial'``, [frequency, phase_shift, amplitude, bias])``    ``img.save(filename ``=``"rd-functioned.jpeg"``)`

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. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course

My Personal Notes arrow_drop_up