Open In App

Node.js GM gamma() Function

Improve
Improve
Like Article
Like
Save
Share
Report

The gamma() function is an inbuilt function in the GraphicsMagick library which is used to level of gamma correction. The function returns the true value on success. 

Syntax:

gamma(red, green, blue)

Parameters: This function accepts three parameters as red, green, and blue which correct the gamma level of red, green, and blue colors respectively. 

Return Value: This function returns the GraphicsMagick object. 

Example 1: 

javascript




// Include gm library
const gm = require('gm');
 
// Import the image
gm('1.png')
 
// Invoke gamma function
.gamma(1, 3.4, 6)
 
// Process and Write the image
.write"gamma1.png", function (err) {
      if (!err) console.log('done');
});


Output:

  

Example 2: 

javascript




// Include gm library
const gm = require('gm');
 
// Import the image
gm(600, 300, 'white')
 
// set the color for the stroke
.stroke("green", 3)
 
// Set the font
.font("Helvetica.ttf", 60)
 
// Call to drawText Function
.drawText(100, 280, "GeeksforGeeks!&")
 
// Invoke borderColor() function
// and set border color to green
.borderColor("Green")
 
// Invoke border function
.border(62, 32)
 
// Invoke gamma function
.gamma(3, 45, 10)
 
// Process and Write the image
.write("gamma2.png", function (err) {
      if (!err) console.log('done');
});


Output: 

 

Reference:



Last Updated : 30 Mar, 2023
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads