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How to apply antialiasing in HTML5 canvas drawImage()?
For antialiasing, you need to set resampling quality.
ctx.imageSmoothingQuality = "low|medium|high"
Use an off-screen canvas to reduce the image to half −
var c = document.createElement('canvas'),
ocx = c.getContext('2d');
c.width = img.width * 0.5;
c.height = img.height * 0.5;
ocxx.drawImage(img, 0, 0, c.width, c.height);// drawing images reducing to half again and repeating it
ocx.drawImage(c, 0, 0, c.width * 0.5, cc.height * 0.5);
Updated on: 24-Jun-2020
2K+ Views
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