Nodejs | GM sharpen() Function

The sharpen() function is an inbuilt function in GraphicsMagick library which is used to sharpen the image. It uses a Gaussian operator of the given radius and standard deviation (sigma).

Syntax:

sharpen( radius, sd )

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



  • radius: This parameter stores the radius value of the sharpness.
  • sd: It is an optional parameter which stores the standard deviation of the image.

Return Value: This function returns Gmagick sharpen image.

Original Image:

Example 1:

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// Include gm library
var gm = require('gm');
  
// Import the image
gm('1.png')
  
// Invoke sharpen function with
// radius as 10 ad standard
// deviation as 2
.sharpen(10, 2)
  
// Process and Write the image
.write("1b.png", function (err) {
    if (!err) console.log('done');
});

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Output:

Example 2:

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// Include gm library
var gm = require('gm');
  
// Import the image
gm('1.png')
  
// Set stroke color
.stroke("#fe1232")
  
// Set fill color
.fill("#1200ff")
  
// Draw Rectangle using drawRectangle function
.drawRectangle(10, 2, 130, 30, 1, 2)
  
// Invoke Sharpen Function with radius as 10 
.sharpen(10)
  
// Process and Write the image
.write("1a.png", function (err) {
    if (!err) console.log('done');
});

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Output:

Reference:




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