Node.js GM randomThreshold() Function
The randomThreshold() function is an inbuilt function in the GraphicsMagick library which is used to apply a random threshold to the image. The function returns the true value of success.
Syntax:
randomThreshold( channelType, LOWxHIGH )
Parameters: This function accepts two parameters as mentioned above and described below:
- channelType: This parameter is used to specify the value of Channel Type as All, Intensity, Red, Green, Blue, Cyan, Magenta, Yellow, Black, and Opacity.
- LOWxHIGH: This parameter is used to specify the value of the level. The threshold never exceeds the specified maximum (HIGH) and is never less than the specified minimum (LOW).
Return Value: This function returns the GraphicsMagick object.
Example 1:
javascript
const gm = require( 'gm' );
gm( '1.png' )
.randomThreshold( 'All' , '10x200' )
.write( "randomThreshold1.png" , function (err) {
if (!err) console.log( 'done' );
});
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Output:
Example 2:
javascript
const gm = require( 'gm' );
gm(600, 300, 'white' )
.stroke( "green" , 3)
.font( "Helvetica.ttf" , 60)
.drawText(100, 280, "GeeksforGeeks!" )
.randomThreshold( 'Green' , '100x600' )
.write( "randomThreshold2.png" , function (err) {
if (!err) console.log( 'done' );
});
|
Output:
Reference:
Last Updated :
31 Mar, 2023
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