Tips for enhancing image resolution when converting from canvas toDataURL

After grabbing an image from a DIV with HTML2CANVAS, I noticed that the image quality is disappointingly poor and pixelated. The resolution of the captured image is only 96 dpi. Is there a way to boost the resolution for a clearer, high-quality image?

Could someone please provide assistance on achieving a good quality image with a higher resolution?

This is the code snippet I am using:

 <div style="border-style: solid; height: 15cm; width: 15cm; border-radius:25px; 
             position: relative; top: 1px;" id="DIV1">

var element = $("#DIV1");

html2canvas(element, {
  useCORS: true,
  onrendered: function (canvas) {

        var dataURL = canvas.toDataURL("image/png");
        window.open(dataURL);
      }
   }); 

I am uploading a high-resolution image above DIV1 using FileUploader. However, when html2canvas captures the image, it becomes pixelated and stuck at 96 dpi resolution. Is there a method to increase the resolution to 300 dpi?

Answer №1

The standard Windows display dpi is typically set at 96 dpi. This means that when capturing a screenshot without any form of up-scaling, the resulting image will have a similar dpi.

There has been a feature request submitted on the html2canvas GitHub repository for adding this particular capability. However, the request has been open since 2013. As a workaround, one can try scaling the element using transform: scale(2, 2), although this may not be the ideal solution.

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