Node.js GM crop() Function

The crop() function is an inbuilt function in the GraphicsMagick library which is used to remove the unwanted areas of the image by specifying the coordinates. The function returns the true value on success.

Syntax:

crop(width, height, x, y, percentage)

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

width: This parameter is used to specify the width from which the image is to be cropped.
height: This parameter is used to specify the height from which the image is to be cropped.
x: This parameter is used to specify the width by which the image is to be cropped.
y: This parameter is used to specify the width by which the image is to be cropped.
percentage: This parameter is used to specify the boolean value if true then all the previously mentioned values are considered to be percentages else in pixels.

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 crop function

.crop(50, 50, 12, 6, true)
 
// Process and Write the image

.write("crop1.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 gaussian function

.crop(70, 40, 10, 10, true)
 
// Process and Write the image

.write("crop2.png", function (err) {

      if (!err) console.log('done');
});

Output:

Reference:

Article Tags :

Node.js

Web Technologies

Image-Processing

Node.js-GM