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: 

Output: 

👁 Image
 

Example 2: 

Output: 

👁 Image
 

Reference:

• http://www.graphicsmagick.org/GraphicsMagick.html#details-randomThreshold
• https://www.npmjs.com/package/gm