Node.js GM quality() Function Last Updated : 28 Apr, 2025 Comments Improve Suggest changes Like Article Like Report The quality() function is an inbuilt function in the GraphicsMagick library which is used for JPEG/MIFF/PNG/TIFF compression levels. If the filter type is 4 or less, the specified filter type is used for all scanlines:0: none, 1: sub, 2: up, 3: average, 4: Path. The function returns the true value on success. Syntax: quality( level ) Parameters: This function accepts a single parameter which is mentioned above and defined below: level: This parameter is used to specify the level of the quality. 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 quality function with // average parameter .quality(3) // Process and Write the image .write("quality1.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 quality function with // sub-option via 1 // 0: none // 1: sub // 2: up // 3: average // 4: Paeth .quality(1) // Process and write the image .write("quality2.png", function (err) { if (!err) console.log('done'); }); Output: Reference: http://www.graphicsmagick.org/GraphicsMagick.html#details-qualityhttps://www.npmjs.com/package/gm Comment More infoAdvertise with us Next Article NodeJS Introduction S sarthak_ishu11 Follow Improve Article Tags : Web Technologies Node.js Image-Processing Node.js-GM Similar Reads Node.js Tutorial Node.js is a powerful, open-source, and cross-platform JavaScript runtime environment built on Chrome's V8 engine. 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