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Nodejs | GM median() Function

  • Last Updated : 16 Apr, 2020

The median() function is an inbuilt function in the GraphicsMagick library which is used to apply a median filter to the image. The function returns the true value on success.

Note: This function does not work after composite() function.

Syntax:

median(radius)

Parameters: This function accept single parameter radius which is the radius of the pixel.

Return Value: This function returns the GraphicsMagick object.



Example 1:




// Include gm library
var gm = require('gm');
  
// Import the image
gm('1.png')
  
// Invoke Median function
.median(2)
  
// Process and Write the image
.write("median1.png", function (err) {
  if (!err) console.log('done');
});

Output:

Example 2:




// Include gm library
var 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 median function
.median(5)
  
// Process and write the image 
.write("median2.png", function (err) {
  if (!err) console.log('done');
});

Output:

Reference:




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