Node.js GM median() Function
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 the composite() function.
Syntax:
median(radius)
Parameters: This function accepts a single parameter radius which is the radius of the pixel.
Return Value: This function returns the GraphicsMagick object.
Example 1:
javascript
// Include gm libraryconst gm = require('gm');// Import the imagegm('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:
javascript
// Include gm libraryconst gm = require('gm');// Import the imagegm(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, "w3wiki!")// 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:
- http://www.graphicsmagick.org/GraphicsMagick.html
- https://www.npmjs.com/package/gm