Node.js GM segment() Function

Last Updated : 31 Mar, 2023

The segment() function is an inbuilt function in the GraphicsMagick library which is used to segment an image by analyzing the histograms of the color components and identifying units that are homogeneous with the fuzzy c-means technique. The function returns the true value on success.

Syntax:

threshold( cluster threshold, smoothing threshold )

Parameters: This function accepts two parameters as mentioned above and described below:

cluster threshold: This parameter is used to specify the value of the cluster threshold.
smoothing threshold: This parameter is used to specify the value of the smoothing threshold.

Return Value: This function returns the GraphicsMagick object.

Example 1:

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 segment function
.segment(1, 0.1)
 
// Process and write the image 
.write("segment1.png", function (err) {
      if (!err) console.log('done');
});

Output:

Example 2:

Javascript

// Include gm library
const gm = require('gm');
 
// Import the image
gm('1.png')
 
// Invoke segment function with 2, 0.2
.segment(2, 0.2)
 
// Process and Write the image
.write("segment1.png", function (err) {
      if (!err) console.log('done');
});